Qualification: 
Ph.D
Email: 
k_mini@cb.amrita.edu

Dr. Mini K. M. has joined Amrita School of Engineering, Coimbatore in the year 1996. She received her Ph. D. from Anna University and her research area was focused on the Application of Soft Computing in Structural Engineering.

She was the principal investigator of the All - India Council for Technical Education (AICTE) funded project, “Development and Scale - up of Plunging Hollow Jet and Venturi Aerator.” The aerator developed based on the project was successfully installed in the effluent treatment plant of Amrita Vishwa Vidyapeetham, Coimbatore. Apart from this, she also completed the Department of Science & Technology (DST) funded project, “Investigation of Compatibility between Portland Pozzolana Cement and Admixtures in High Performance Concrete.”as the principal investigator.

Presently Dr. Mini is the principal investigator for the project, “Development of High Volume Flyash Foam Concrete Wall Panel Using Rice Straw as Thermal Insulation Material” Initiative to Promote Habitat Energy Efficiency (I-PHEE) by Department of Science & Technology (DST). The project focuses on the development of an eco-friend and sustainable wall panel which can be used for thermal insulation in buildings.

She has several publications in referred international and national journals and in various conferences. She serves as reviewer for various referred international journals such as Construction and Building Materials , Journal of Sustainable Cement Based Materials, Structural Engineering and Mechanics, Steel & Composite Structures, Materials in Civil Engineering etc.

She authored a book titled Analysis and Assessment of Behavior of Infilled Frames using Artificial Neural Networks, published by Lambert Academic Publishing (LAB), ISBN – 978-3-8443-1068-9.

Dr. Mini’s areas of interest include Concrete Technology, Soft Computing, Structural Optimization and Composite Structures.

Projects and Consultancies

  • “Development of boron carbide cement concrete for neutron shielding”, BRNS, Sanction No: 51/14/03/2020-BRNS – Principal Investigator
  • “Development of High Volume Flyash Foam Concrete Wall Panel Using Rice Straw as Thermal Insulation Material” Initiative to Promote Habitat Energy Efficiency (I-PHEE) – Department of Science & Technology (DST) – 2017-21 – Principal Investigator
  • “Treatment of Pharmaceutical and personal care products (PPCPs) using Advanced Oxidation Process” (Amrita Vishwa Vidyapeetham) – Co-Investigator
  • “Influence of Boron Carbide Addition on Performance and Neutron Shielding Ability of Cement Mortar Mix” (Amrita Vishwa Vidyapeetham) -– Principal Investigator
  • “Investigation of Compatibility between Portland Pozzolana Cement and Admixtures in High Performance Concrete” Department of Science and Technology, 2012-2015  – Principal Investigator
  • “Neural network modelling for stability analysis of fibre reinforced composite laminate plates” Institution of Engineers (India) -– Principal Investigator
  • “Development and scale_up of plunging hollow jet, venturi and sudden expansion type aerators” (F.No.8021/RID-195/2002-03/Revalidated 2003-04), All India Council for Technical Education -– Principal Investigator

Publications

Publication Type: Journal Article

Year of Publication Title

2021

A. Raj, Dhanya Sathyan, Balaji K., and Dr. Mini K. M., “Heat transfer simulation across a building insulated with foam concrete wall cladding”, Materials Today: Proceedings, vol. 42, pp. 1442-1446, 2021.[Abstract]


Foam concrete is a light-weight concrete. It has high flowability, porosity, fire resistance, airborne sound insulation, good heat insulation, and a desirable compressive strength. The goal of this study is to produce thermal insulation foamed concrete cladding using cement, fly ash, and rice straw. Rice straw and fly ash were used to improve the thermal properties of foamed concrete. The present study analyses the thermal and strength properties of foam concrete. Numerical study to investigate the thermal insulation capacity using COMSOL software is also done. The w/s ratio of 0.55, fly ash cement ratio of 1:1 is fixed for all the specimens. The result shows that the mix with 1% rice straw (by weight of cement), 20% foam volume, is found to be optimum in terms of strength, thermal conductivity.

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2021

M. Harish, Dr. Jayanarayanan K., and Dr. Mini K. M., “Recent trends in utilization of plastics waste composites as construction materials”, Construction and Building Materials, vol. 271, p. 121520, 2021.[Abstract]


The rapid growth in the construction industry and the resulting environmental issues due to improper waste management leads to the formation of new construction materials from waste and its residue. This paper is a review of different research approaches that employs waste materials mixed with fillers as construction materials. A refined analysis of construction materials derived from plastic waste in concrete along with sand, clay, sawdust, rice husk, and other fillers are detailed. The different processes involved in the development of materials along with their mechanical behaviour are being discussed. The application of different coupling agents along with plastic waste and fillers which indicates its future applications as a viable material in the construction industry are also explained in detail.

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2020

R. C. Kumar, Gadekari, R. Sai, Vani, G., and Dr. Mini K. M., “Stabilization of black cotton soil and loam soil using reclaimed asphalt pavement and waste crushed glass”, Materials Today: Proceedings, vol. 24, pp. 379-387, 2020.[Abstract]


Stabilization of soil to attain required engineering properties can be done either by mechanical or chemical stabilization. Most of these methods are relatively expensive to implement in practice and the best way is the usage of locally available materials. The present paper reports the stabilization of black cotton soil and loam soil with varying percentages of Reclaimed Asphalt Pavement (RAP) and waste crushed Glass (WCG). Various properties such as maximum dry density, optimum moisture content, and California Bearing Ratio (CBR) are analysed and the results are compared with red soil. Investigations are performed using percentages of Reclaimed Asphalt Pavement (RAP) at 30%, 50%, 55%, 60%, 65% and Waste Crushed Glass (WCG) at 5%. The results showed that there was an appreciable increase in strength and CBR values by the addition of RAP and WCG. The paper proved the effectiveness of proposed method for construction of pavements in village roads with reduced thickness.

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2020

N. Therese, Sruthy, S., and Dr. Mini K. M., “Vibration isolation at the level of footing using modified concrete”, Materials Today: Proceedings, vol. 24, pp. 1090-1099, 2020.[Abstract]


Isolation of vibrations from the building during a seismic event is a proven practice to reduce damage to buildings. This paper studies the effectiveness of a new technique of vibration isolation. A modified concrete layer with damping characteristics is provided around the footing to isolate the building from the vibrations during an earthquake. The modified concrete is prepared by using varying percentages of crumb rubber and steel slag as a replacement to fine aggregates. Apart from providing the modified concrete as a confining layer, modification is done to the structural material in footing itself and is investigated for its effectiveness in improving the seismic performance. A multi-storeyed building is selected, modeled in ANSYS Workbench, modified concrete is incorporated in two different ways in and around footing and the seismic responses are compared with that of a conventional building without any modifications. Accelerogram from El – Centro Earthquake is used as the input loading. The material properties required for the analysis is obtained by conducting experiments. The energy dissipation capacity of the modified concrete with various percentages of fibres is studied using the hysteresis loops generated in ANSYS. Both the techniques showed a improvement in the seismic performance, providing the modified concrete as a structural material exhibited better results. Sleel slag modified concrete has better energy dissipation capacity than crumb rubber.

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2020

M. Ananthkumar, Dr. Mini K. M., Prakash, C., Sharma, S., and Krishnaa, B., “Study on the efficiency of CFRP and GFRP in corrosion resistance of rebar embedded in concrete”, IOP Conference Series: Materials Science and Engineering, vol. 872, p. 012137, 2020.[Abstract]


Efficiency of composite materials like carbon fibre reinforced polymer (CFRP) and Glass Fibre Reinforced Polymer (GFRP) in controlling rebar corrosion is not studied much. In the present study, cylinders of size 300mm height and 100 mm diameter were casted by using CFRP as a wrap and GFRP in powdered form as an admixture in concrete. Anti-corrosive rubber coating is applied all over the rebar. The concrete cylinders are subjected to accelerated corrosion using 0.5M HCl and 3% NaCl solution for a period of 60 days. The corrosion rate was calculated at regular intervals using Half-cell potential, Linear Polarisation Resistance and Tafel plot measurements. The corrosion resistance of all the specimens are compared and the results have shown that both CFRP and GFRP performed well in corrosion resistance at varying levels. The appropriate protection material from corrosion is also proposed Study on the efficiency of CFRP and GFRP in corrosion resistance of rebar embedded in concrete.

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2020

N. Krishnaan K., Hari, R., and Dr. Mini K. M., “Finite element analysis on the performance of strengthening concrete structures confined using natural and artificial fibers ”, Journal of Physics: Conference Series, vol. 1451, p. 012001, 2020.[Abstract]


In India, there is a drastic increase in the rehabilitation and retrofitting of existing structures compared to demolition. In the current paper, the performance of basalt fiber as a strengthening material in concrete structures for retrofitting application is explored using finite element method rather than the costly experimental method. The model is developed using Jhonson cook's model and is compared with the experimental results for its validation. JC model incorporated with master-slave interaction between concrete-binder and fabric -binder have been modelled as shell elements which replicate the actual scenario of tension or compression only. Analytical models have been emerged as a powerful solution for experimenting stress-strain analysis in composites.

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2020

A. Sankar, Hari, R., and Dr. Mini K. M., “Effect of micro silica and aggregate size on cracking of self-compacting concrete”, Proceedings of the Institution of Civil Engineers - Construction Materials, vol. 173, pp. 1-22, 2020.

2020

V. Ramganesh, Kumar, M., Dr. Mini K. M., Vignesh, V., and Karthikeyan, R., “Effect of nano TiO 2 -epoxy composite in bond strength and corrosion resistance of rebar embedded in micro-silica modified concrete”, Journal of Physics: Conference Series, vol. 1706, p. 012122, 2020.

2020

D. Jagan, Shankar, V., Mahalingam, T., Dhanya Sathyan, Dr. Mini K. M., and Sahai, G., “Experimental investigation on strength properties of poly - propylene fibre reinforced concrete”, IOP Conference Series: Materials Science and Engineering, vol. 872, p. 012150, 2020.

2020

S. Sharook, Dhanya Sathyan, and Dr. Mini K. M., “Thermo-mechanical and durability properties of expanded perlite aggregate foamed concrete”, Proceedings of the Institution of Civil Engineers - Construction Materials, pp. 1-9, 2020.[Abstract]


The thermal conductivity of a material is a measure of its capacity to conduct heat and is a major factor influencing heat transfer in buildings. For better thermal insulation, construction materials should possess low thermal conductivity. The feasibility of expanded perlite aggregate as a thermal insulation material in foamed concrete was examined. Mechanical, thermo-mechanical and durability properties were assessed and compared. A base mix was designed to have 1100 kg/m3 density, a water-to-solids ratio of 0.3 and a cement-to-sand ratio of 1:1. Expanded perlite aggregate was used as a substitute for fine aggregate in the foamed concrete mix at contents of 0, 10, 20 and 30% by volume. The work was extended by replacing cement with 60% by weight of fly ash to study an eco-friendly mix. The test results showed that the strength values increased with an increase in fly ash and decreased with an increase in perlite. The reverse trend was observed for thermal conductivity and durability, which was also affected by the addition of perlite. The test results showed that expanded perlite is an excellent replacement for sand as a thermal insulation material. The efficiency of the developed material was assessed by an analytical model using the Comsol Multiphysics software program.

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2020

R. R. Lakshan, Rosini, A. M., Sathiyan, K., Dhanya Sathyan, Dr. Mini K. M., and Dr. Gangadharan D., “Comparison of different dosages of PCM incorporated wallpanels”, IOP Conference Series: Materials Science and Engineering, vol. 872, p. 012119, 2020.[Abstract]


In the modern world of development and technology, sustainable development is of greater need. One of the main factors that cause global warming is due to the usage of the artificial air conditioner in buildings. This study is the development of an eco-friendly wall panel for buildings which can reduce the usage of artificial air conditioner and to improve the thermal comfort in buildings in a sustainable way. To achieve this, PCM materials is used in mortar wall panels to regulate the temperature. PCM absorbs heat at higher temperature and releases the absorbed heat at lower temperature. In this study PCM were encapsulated to prevent them from being affected by the chemical environment. The encapsulated PCM were incorporated in mortar cubes and were made into wall panels. The PCM incorporated specimens were tested for compressive strength and thermal conductivity to study the hardened property and the heat transfer. The obtained results were compared with the control specimen to conclude the effect of PCM in mortar wall panels. The PCM incorporated specimens showed improved results compared to the control specimen.

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2020

, Raj, A., Dhanya, S., and Dr. Mini K. M., “A Study on Performance of Eps Sandwich Foam Concrete Wall Panel”, Energy Efficiency, Springer, Manuscript No. ENEF_ D-19-00100, 2020.

2020

B. raj, Dhanya Sathyan, and Dr. Mini K. M., “Mechanical and Durability Properties of Hybrid Fiber Reinforced Foam Concrete”, Construction and Building materials, CONBUILDMAT-D-19-03919 , 2020.

2019

L. Suresh and Dr. Mini K. M., “Effect of Multiple Tuned Mass Dampers for Vibration Control in High-Rise Buildings”, Practice Periodical on Structural Design and Construction, vol. 24, p. 04019031, 2019.[Abstract]


Tuned mass dampers (TMDs) are one of the strategies implemented in the field of structural vibration control. Most researchers have only focused on the control of one specific mode of vibration by idealizing the structure as a single-degree-of-freedom system. From a practical point of view, the use of a single large TMD within a structure would adversely affect the architectural appeal, usable space, and ease of installation. This study introduces a multiple tuned mass damper (MTMD) system, which is simple and more effective than a conventional single TMD system. The system consists of multiple smaller dampers distributed within the structure either uniformly, varying linearly, or based on the judgment of the designer. TMDs tuned to the first, second, and third natural frequencies are used to control vibrations, thus enabling a wider bandwidth of vibration control and attaining remarkable reductions in floor displacements, floor accelerations, and base shear. A MTMD system was investigated for different base excitations, namely harmonic and seismic. A three-degrees-of-freedom frame model and three mass dampers tuned to all three natural frequencies of the system were fabricated. This building model was studied experimentally and analyzed to investigate the effect of harmonic base excitation on structures. Compared with single TMD systems, the performance of the proposed MTMDs system was found to be excellent in controlling displacements. A five-degrees-of-freedom structure was analyzed for seismic excitation to study the effect of two mass dampers tuned to first two natural frequencies with a mass ratio of 5%. The proposed system significantly reduced the displacement, acceleration, and base shear response at the next-higher-order natural frequency beyond the fundamental. The responses of the structures were compared to assess the optimal placement of dampers to attain highest performance. Vibration control by multiple TMDs was found to be more efficient when dampers are strategically placed on the floors, with the maximum amplitude in the mode shapes corresponding to the respective tuning frequencies.

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2019

M. Ananthkumar and Dr. Mini K. M., “Effectiveness of corrosion resistance of strontium and barium coated rebars – a preliminary comparative study”, IOP Conference Series: Materials Science and Engineering, vol. 561, p. 012077, 2019.

2019

G. Kottukappalli Febin, A. J. Abhirami, A. Vineetha, V. Manisha, Ramkrishnan R., Dhanya Sathyan, and Dr. Mini K. M., “Strength and durability properties of quarry dust powder incorporated concrete blocks”, Construction and Building Materials, vol. 228, 2019.[Abstract]


Quarry dust powder is the waste generated from Manufactured Sand (M Sand) units and constitutes to 30–40% of the total quarry dust produced. When dry, it turns into fine dust that causes severe health issues to people and also causes serious threats to environment by polluting soil and water. Transportation and proper disposal of this waste is a tedious task because of its adhesive nature and high water absorption character. The present study reports the suitability of quarry dust powder in the development of concrete building blocks by evaluating its strength, durability, acoustic and thermal properties. Since the mixes showed very dry nature at higher percentages of M Sand replacement, workability was kept in a constant range to find the optimum mix. M Sand was replaced with quarry dust powder in the test specimens at varying percentages of 0, 15, 30, 45 and 60 and tests were conducted to study these properties after finalizing the optimum mix. On comparing the results, it was found that compressive and split tensile strength increased and impact strength decreased on replacing M Sand with quarry dust powder. Abrasion resistance, acoustic absorption and sorptivity properties were found to improve at 30% replacement whereas thermal conductivity was found to increase with increasing percentages of M Sand replacement. The results of the study have thus proved the effective use of quarry dust powder in developing concrete building blocks in an economic, effective and sustainable way.

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2019

A. Raj, Dhanya Sathyan, and Dr. Mini K. M., “Physical and Functional Characteristics of Foam Concrete: A Review”, Construction and Building materials , 2019.

2019

A. N. R, Dhanya Sathyan, and Dr. Mini K. M., “Rice Husk Incorporated Foam Concrete Wall Panels as a Thermal Insulating Material in Building”, Indoor and built environment, 2019.

2019

V. K. Kumar, T. Saravanan, J., Gopalakrishnan, N., and Dr. Mini K. M., “Analytical Investigations on Structural Damage Identification Using Torsional Wave Propagation”, Recent Advances in Structural Engineering, , vol. 1, 2019.[Abstract]


Damage identification of the concrete pile element through torsional wave propagation technique is studied in this paper. Concrete pile foundations are often prevalent in all engineering structures and their safety is paramount for obviating the failure. Damage detection and estimation in a substructure is difficult because the visual image of the substructure and its condition is not acknowledged and, therefore, the state of the structure or foundation can be inferred solely through its static and dynamic response which is usually carried out by using Pile Integrity Testing (PIT), includes axial wave propagation approach. This paper explores a novel idea on damage identification of the concrete pile element through torsional wave propagation technique using analytical study. Structural damage is induced in the concrete pile elements by varying the cross-sectional area along the length and the position of the damage is also varied. Analytical simulations are performed using Abaqus dynamic explicit analysis under pulse-echo configuration method. The effect of reduction of area (or an increase of area) causes a reduction in stiffness, as well as mass and thus torsional impedance, is not altered to a great extent. In the case of uniform wave propagation, the transient pulse is preserved and the response is quiet and hence the damage identification is very easy when compared to dispersive flexural wave propagation. Hence, the elapsed time of the reflected pulse can be a simple indicator of the location of the damage.

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2019

N. K. Krishnan, Hari, R., and Dr. Mini K. M., “Comparative Study on Strengthening of Concrete Structures using Natural and Artificial fibers”, Journal of Physics: Conference Series, vol. 1172, 2019.[Abstract]


In India, most of the existing buildings, bridges and historical monuments are more than 50 years old. Demolition of the entire structure and construction of new structure is not a feasible solution as it involves lot of investment, time, and effort. So there is a drastic increase in the demand for low cost and most sustainable fiber composites for strengthening/retrofitting of the existing buildings and bridges. In the present paper, the possibility of using basalt fiber as a strengthening material for retrofitting of the reinforced concrete structures is explored. Normal strength concrete cylinders were cast and wrapped with Basalt fiber fabric. The results are compared with specimens wrapped with one layer of carbon fiber and control specimen. Test results showed an improvement in compressive strength of cylinders as the number of layers of wrapping of basalt fibre fabric is increased. The load deflection performance of wrapped specimens is also found promising in terms of stiffness and ductility. © Published under licence by IOP Publishing Ltd.

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2019

R. Hari and Dr. Mini K. M., “Mechanical and Durability Properties of Sisal-Nylon 6 Hybrid Fibre Reinforced High Strength SCC”, Construction and Building Materials, vol. 204, pp. 479-491, 2019.[Abstract]


The higher paste volume in Self Compacting Concrete (SCC) makes it susceptible to have higher creep coefficient and cracking. Microcracks which are developed during the process of hardening of concrete makes the composite weak. This inherent internal flaw in concrete can be healed by blending it with fibre. A single fibre may be competent only for a narrow range of strain and crack growth rate, hence, may be ineffective for the comprehensive improvement of strength or ductility of concrete. This emanates in Hybrid Fibre Reinforced Concrete which acquires the advantages from the synergistic action of blended fibres. In this study, high strength SCC is developed with sisal-Nylon 6 mono and hybrid fibre combination proportioned at 0/100, 25/75, 50/50, 75/25 and 100/0 of total fibre volume. It is observed that hybridisation improved the flexural and tensile properties vis-à-vis mono fibre mixes. Also the stress-strain and ductility behaviour are augmented by hybridisation. The developed fibre reinforced concrete underwent acceptable water absorption and prevents chances of fibre deterioration which affect concrete durability. Even though nylon enhances mechanical properties it induces durability issues when exposure is considered. A statistical analysis using ANOVA is carried out to prove the effectiveness of hybridisation and fibre volume on mechanical properties of hybrid fiber reinforced self-compacting concrete. © 2019 Elsevier Ltd

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2019

A. Nadiger and Dr. Mini K. M., “Influence of mineral admixtures and fibers on workability and mechanical properties of reactive powder concrete”, Journal of Materials in Civil Engineering, vol. 31, 2019.[Abstract]


This paper investigates the influence of mineral admixtures and fibers on workability and mechanical properties of reactive powder concrete. Preliminary tests of materials and multiple trial mix designs are carried out to establish a proper control mix of ultrahigh-strength concrete satisfying workability and mechanical properties. Cement is replaced with silica fume and ultrafine ground granulated blast furnace slag (GGBS) in the range of 0%-15%, and sand is replaced with quartz powder in range of 0%-15%. These mixes are investigated individually and in combination for workability and mechanical properties such as compressive strength, split tensile strength, and flexure tests for various curing regimes, namely normal curing, preheat curing, and postheat curing. X-ray diffraction (XRD) analysis investigates the composition responsible for the high mechanical and durability characteristics. The study is extended to improve the ductility of reactive powder concrete by addition of various synthetic and natural fibers to investigate its mechanical properties. The best mix is selected considering the workability and mechanical properties of the reactive powder concrete developed. © 2018 American Society of Civil Engineers.

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2019

A. Padanattil, Mahadevan Lakshmanan, Dr. Jayanarayanan K., and Dr. Mini K. M., “Strengthening of Plain Concrete Cylinders with Natural FRP Composite Systems”, Iranian Journal of Science and Technology, Transactions of Civil Engineering, vol. 43, no. 3, pp. 381-389, 2019.[Abstract]


This paper reports the performance of plain concrete cylinders confined externally with fiber-reinforced polymer (FRP) composites with natural sisal as the reinforcement. Strength tests are performed on plain concrete cylinders confined with different sisal FRP thicknesses such as 1, 2 and 3 layers. The results show that external confinement with sisal FRP enhanced the axial load-carrying capacity, ductility and energy absorption of concrete compared to control specimens. For predicting the ultimate strength of sisal FRP-confined concrete a new strength equation was developed based on the lateral confining pressure of sisal FRP which shows a good agreement with the experimental results. To assess the durability criteria, sisal FRP-filled concrete specimens are exposed to severe environmental factors such as variation in temperature, alternate wet and dry cycling and exposure to alkaline condition. The outcomes indicate that sisal FRP-confined specimen subjected to temperature variation has shown a remarkable increase in strength, whereas alkaline exposure has exhibited a decrease in strength.

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2018

Suganya M, Dr. Mini K. M., and Dhanya Sathyan, “Performance of Concrete Made Using Waste Fiber Reinforced Polymer (Frp) Powder as A Partial Replacement for Fine Aggregate”, Material today proceeding, vol. 5, no. 11, pp. 24114-24123, 2018.

2018

Ardra Mohan and Dr. Mini K. M., “Strength and Durability Studies of SCC Incorporating Silica Fume and Ultra Fine GGBS”, Construction and Building Materials, vol. 171, pp. 919 - 928, 2018.[Abstract]


The cost associated with the application of large volume of cement and synthetic admixtures was one of the major drawbacks of Self Compacting Concrete (SCC), which can be reduced by the use of supplementary cementitious materials (SCM). When the demand of cement reduces, the release of Carbon dioxide (CO2) from cement industries will come down, which has a positive impact on global warming. The present paper reports an attempt in this direction by experimental examination on the fresh and mechanical properties of SCC by replacing cement with SCM such as silica fume and ultra-fine Ground Granulated Blast Furnace Slag (GGBS) in varying ratios. SCC mix was obtained by fixing the water-binder ratio and changing super plasticizer (SP) dosage with respect to total cementitious content. Along with the mechanical properties, SCC mixes incorporating both alccofine and silica fume at 10% which gave the best strength were selected to assess the durability issues. Incorporating 10% silica fume gave the best result in both mechanical and durability studies in comparison with other combinations. The determination of the optimum mix containing both silica and alccofine was carried out by a statistical approach using Design of Experiments (DOE). DOE results gave optimum dosage of silica fume and alccofine as 6% and 8% respectively, which also satisfied the SCC property by changing the super plasticizer dosage. Experimentally obtained mechanical properties of the combination mix were in agreement with DOE results.

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2018

E. Parvathi, Mahadevan Lakshmanan, and Dr. Mini K. M., “Strengthening Steel Members with Holes Under Tension Using Unidirectional GFRP Sheets”, International Journal of Steel Structures, vol. 18, no. 2, pp. 496-511, 2018.[Abstract]


Steel structure sections are often connected using bolts and rivets, which necessitates the need for holes. These holes provide a zone of failure during loading. In the present work an attempt is made to strengthen the steel members under tensile loading with hole provision for bolts, using Glass Fiber Reinforced Polymer (GFRP) sheets. The performance of FRP wrapping is assessed by changing the angle of orientation of fiber. The experimental investigation is conducted for one hole, two hole and staggered hole arrangement and the results are compared with finite element analysis. The difference between experiment and finite element modeling are within allowable limits. From the study it is found that GFRP wrapping with 0° orientation of fiber is the most suitable in terms of ultimate strength for all the three hole configurations. © 2018, Korean Society of Steel Construction.

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2018

M. P. Kumar, Dr. Mini K. M., and Dr. Murali Rangarajan, “Ultrafine GGBS and calcium nitrate as concrete admixtures for improved mechanical properties and corrosion resistance”, Construction and Building Materials, vol. 182, pp. 249-257, 2018.[Abstract]


This work reports the modification of ordinary Portland cement with ultrafine ground granulated blast furnace slag (GGBS) as a mineral admixture and calcium nitrate as a chemical admixture and examines how mechanical and corrosion properties are improved by this modification. Ultrafine GGBS with average particle size of 4–6 μM was introduced as a replacement mineral admixture (10%) to ordinary Portland cement while calcium nitrate was introduced as a chemical admixture at 2% amount of cementitious material, in the preparation of concrete. X-ray diffraction studies on powdered concrete showed that the amount of silica in the concrete increases with the introduction of GGBS. Calcium hydroxide was converted to calcium silicates. Ultrafine GGBS reduced the workability and water absorption and increased the compressive strength of the concrete (18%) and the bond strength of the steel rebar (45%). Adding calcium nitrate further reduced water absorption of the concrete but improved workability, compressive strength (32%) and bond strength (131%). The pH of the concrete powdered solution became more alkaline with the replacement of ultrafine GGBS and addition of calcium nitrate. Free chloride content dropped by 39% and 65%, respectively, with the introduction of GGBS and nitrate. Corrosion behaviour of the concrete specimens were studied using measurement of open circuit potentials, linear polarization resistance and Tafel polarization in an accelerated corrosion medium of 3.5% NaCl and 1 M sulphuric acid. Corrosion potential and current of the control specimens decreased with time for 40 days after which an increase was observed. Ultrafine GGBS shifted the corrosion potential in the cathodic direction, indicating retardation of the cathodic reaction (ex. oxygen reduction). Calcium nitrate, on the other hand, shifted the corrosion potential anodically by promoting the formation of a passive film of iron(III) hydroxide on the steel surface. Corrosion currents in GGBS and nitrate-modified concrete decreased by 200-fold compared to the control specimen on the first day, and by 480-fold on the 50th day (150-times smaller than the specimen modified with GGBS alone). Finally, scanning electron microscopy images of the corroded rebar at the end of 50th day indicate that pitting and intergranular corrosion occurs, with its extent reduced significantly by the introduction of admixtures. These results demonstrate that ultrafine GGBS and calcium nitrate as admixtures enhance the mechanical properties of concrete and reduce the corrosion of rebar. © 2018

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2018

N. Kaarthik Krishna, Sandeep, S., and Dr. Mini K. M., “Study on reinforced concrete beams with helical transverse reinforcement”, IOP Conference Series: Materials Science and Engineering, vol. 310, p. 012046, 2018.[Abstract]


In a Reinforced Concrete (R.C) structure, major reinforcement is used for taking up tensile stresses acting on the structure due to applied loading. The present paper reports the behavior of reinforced concrete beams with helical reinforcement (transverse reinforcement) subjected to monotonous loading by 3-point flexure test. The results were compared with identically similar reinforced concrete beams with rectangular stirrups. During the test crack evolution, load carrying capacity and deflection of the beams were monitored, analyzed and compared. Test results indicate that the use of helical reinforcement provides enhanced load carrying capacity and a lower deflection proving to be more ductile, clearly indicating the advantage in carrying horizontal loads. An analysis was also carried out using ANSYS software in order to compare the test results of both the beams. © Published under licence by IOP Publishing Ltd.

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2018

Dhanya Sathyan, Dr. Anand K. B., Dr. Mini K. M., and Aparna, S., “Optimization of Superplasticizer in Portland Pozzolana Cement Mortar and Concrete”, IOP Conference Series: Materials Science and Engineering, vol. 310, p. 012036, 2018.[Abstract]


Chemical Admixtures are added to concrete at the time of mixing of its constituents to impart workability. The requirement of right workability is the essence of good concrete. It has been found that the use of optimum use of admixtures is very important since low dosage may result in loss of fluidity and over dosage could lead to segregation, bleeding, excessive air entrainment etc in concrete. Hence it is essential to find optimum dosage of superplasticizer for getting good strength and workability. But large number of trial tests are required in the field to find the saturation dosage of superplasticizer in concrete which requires more materials and consume more time. The paper deals with developing a co-relation between the quantity requirements of superplasticiser in mortar to that of cement concrete to get good workability. In this work for preparing mortar and concrete 4 brands of locally available Portland pozzolana cement (PPC) and superplasticizer (SP) belonging to 4 different families namely Polycarboxylate Ether (PCE), Lignosulphate (LS), Sulfonated Naphthalene Formaldehyde (SNF) and Sulfonated Melamine Formaldehyde (SMF) are used. Two different brands of SP's are taken from each family. Workability study on the superplasticized mortar with cement to sand ratio 1:1.5 and water cement ratio of 0.4 was performed using marsh cone and flow table test and workability study on the concrete with same cement/sand ratio and water cement ratio was done using slump cone and flow table test. Saturation dosage of superplasticizer in mortar and concrete determined experimentally was compared to study the correlation between two. Compressive strength study on concrete cubes were done on concrete mixes with a superplasticizer dosage corresponding to the saturation dosage and a comparative study were done to analyse the improvement in the compressive strength with addition of superplasticizer from different family.

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2018

Prakash Chinnaiyan, S.G. Thampi, M. Kumar, and Dr. Mini K. M., “Pharmaceutical Products as Emerging Contaminant in Water : Relevance for Developing Nations and Identification of Critical Compounds for Indian Environment”, Environmental Monitoring and Assessment, vol. 190, p. 288, 2018.[Abstract]


Pharmaceuticals and personal care products (PPCPs) are contaminants of emerging concern and have been detected worldwide in water bodies in trace concentrations. Most of these emerging contaminants are not regulated in water quality standards except a few in the developed countries. In the case of developing countries, research in this direction is at a nascent stage. For the effective management of Pharmaceutical contaminants (PC) in developing countries, the relevance of PCs as an emerging contaminant has to be analyzed followed by regular monitoring of the environment. Considering the resource constraints, this could be accomplished by identifying the priority compounds which is again region specific and dependent on consumption behavior and pattern. In this work, relevance of pharmaceutical compound as emerging contaminant in water for a developing country like India is examined by considering the data pertaining to pharmaceutical consumption data. To identify the critical Pharmaceutical Contaminants to be monitored in the Indian environment, priority compounds from selected prioritization methods were screened with the compounds listed in National List of Essential Medicine (NLEM), India. Further, information on the number of publications on the compound as an emerging contaminant, data on monitoring studies in India and the number of brands marketing the compound in India were also analyzed. It is found that out of 195 compounds from different prioritization techniques, only 77 compounds were found relevant to India based on NLEM sorting. © 2018, Springer International Publishing AG, part of Springer Nature.

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2018

Akshay Nadiger, C. Harinath Reddy C, S. Vasudevan, and Dr. Mini K. M., “Fuzzy logic modeling for strength prediction of reactive powder concrete”, Advances in Intelligent Systems and Computing (International Conference on Intelligent Computing and Applications, ICICA 2016), vol. 632, pp. 375-386, 2018.[Abstract]


Compressive strength forms the major property which ensures safety and stability in the design of any concrete structure. Addition of admixtures makes concrete of higher strength, which is based on trial-and-error combinations. In the present study, an attempt is made for developing a tool for compressive strength prediction of reactive powder concrete by Mamdani-based fuzzy logic interface system (FIS). The eight main parameters which influencing the strength of concrete were considered as input variables. Database set of 100 data was collected from different literature reviews and worked with trial permutation and combination with different order of material inputs, and 125 rules are set. Twenty-five test results are examined to check the efficiency of the proposed tool and compared with the FIS output by applying various membership functions using both centroid and bisector methods of defuzzification. The predicted results show the potential efficiency of FIS in prediction of compressive strength for reactive powder concrete. The results obtained were satisfactory with high accuracy ranging from 95 to 99%. © Springer Nature Singapore Pte Ltd. 2018.

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2017

KaVarun Kumar, Saravanan, Tbc Jothi, Sreekala, Rb, Gopalakrishnan, Nbd, and Dr. Mini K. M., “Structural damage detection through longitudinal wave propagation using spectral finite element method”, Geomechanics and Engineering, vol. 12, pp. 161-183, 2017.[Abstract]


This paper investigates the damage identification of the concrete pile element through axial wave propagation technique using computational and experimental studies. Now-a-days, concrete pile foundations are often common in all engineering structures and their safety is significant for preventing the failure. Damage detection and estimation in a sub-structure is challenging as the visual picture of the sub-structure and its condition is not well known and the state of the structure or foundation can be inferred only through its static and dynamic response. The concept of wave propagation involves dynamic impedance and whenever a wave encounters a changing impedance (due to loss of stiffness), a reflecting wave is generated with the total strain energy forked as reflected as well as refracted portions. Among many frequency domain methods, the Spectral Finite Element method (SFEM) has been found suitable for analysis of wave propagation in real engineering structures as the formulation is based on dynamic equilibrium under harmonic steady state excitation. The feasibility of the axial wave propagation technique is studied through numerical simulations using Elementary rod theory and higher order Love rod theory under SFEM and ABAQUS dynamic explicit analysis with experimental validation exercise. Towards simulating the damage scenario in a pile element, dis-continuity (impedance mismatch) is induced by varying its cross-sectional area along its length. Both experimental and computational investigations are performed under pulse-echo and pitch-catch configuration methods. Analytical and experimental results are in good agreement. © 2017 Techno-Press, Ltd.

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2017

B. L. P. Dheeraj Swamy, Raghavan, V., Srinivas, K., K Rao, N., Mahadevan Lakshmanan, Dr. Jayanarayanan K., and Dr. Mini K. M., “Influence Of Silica Based Carbon Nano Tube Composites In Concrete”, Advanced Composites Letters, vol. 26, no. 1, pp. 12-17, 2017.[Abstract]


This study focuses on the utilization of highly densified materials in cementitious composites with objectives of improving the mechanical performance and minimizing the number and size of defects. Due to their excellent mechanical properties, carbon nanotubes (CNTs) are now viewed as potential candidate for reinforcement in cement composites. The present paper reports the use of carbon nanotubes (CNTs) as reinforcement to improve the mechanical properties of portland cement paste and creating multifunctional concrete. In order to increase the bonding, and strength, a material with intermediate fineness, highly densified silica fumes, was also utilized. The densified silica fumes along with CNT are added to cement mortar in various proportions. Small-scale specimens were prepared to measure the mechanical properties as a function of nanotube concentration and distribution. Furthermore, properties like shrinkage, permeability and alkalinity of the resultant composite were also investigated. The study addresses the significance of CNT as an additive to the enhancement of properties of cement composite. More »»

2017

Aa Padanattil, Dr. Jayanarayanan K., and Dr. Mini K. M., “Novel hybrid composites based on glass and sisal fiber for retrofitting of reinforced concrete structures”, Construction and Building Materials, vol. 133, pp. 146-153, 2017.[Abstract]


In this work an attempt has been made to assess the efficacy of hybrid composite system as a potential choice for the retrofitting of reinforced concrete structures. The combination of synthetic and natural fibers are used for the external confinement of concrete cylinders. A comparative performance analysis of hybrid sisal-glass fiber reinforced polymer (HSGFRP) confinement vis a vis carbon fiber reinforced polymer (CFRP), glass fiber reinforced polymer (GFRP) and sisal reinforced polymer (SFRP) individual confinement is carried out. The axial compressive behaviour, stress-strain response and energy absorption characteristics are studied. The inclusion of sisal fibers along with glass fiber is found to improve the energy absorption characteristics. For predicting the ultimate strength of HSGFRP confined concrete, a new equation was developed based on the lateral confining pressure which shows good agreement with the experimental results. Durability performance studies indicated that exposure to wet/dry conditions and temperature variations resulted an increase in strength for all FRP confined specimens and whereas it decreased for unconfined ones. © 2016 Elsevier Ltd

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2017

A. Padanattil, Mahadevan Lakshmanan, and Dr. Mini K. M., “Strengthening of plain concrete cylinders with natural sisal FRP composite systems”, International Journal of Earth Sciences and Engineering, 2017.

2017

V. Kumar. K and Dr. Mini K. M., “Decelerating the Corrosion of Steel Bars in Concrete by Addition of Mineral Admixtures”, International Journal of Earth Sciences and Engineering, 2017.

2017

P. .M.Mrudul, .Upender, T., Tarun, V., Dr. Meera Balachandran, and Dr. Mini K. M., “Study on Silica Infused Recycled Aggregate Concrete Using Design of Experiments”, Journal of Engineering science and Technology, vol. 12, no. 10, 2017.[Abstract]


Recycled Aggregate (RA) generated from the construction industry is used as a material for sustainable construction. The old mortar attached to these aggregates makes it porous and are generally used for low-grade applications. However, by infusing with silica fumes, the properties of recycled aggregate concrete (RAC) can be improved, as the silica fumes get infused into the pores of old mortar attached to it. In this study, the optimum percentage of recycled aggregate that can be used in fresh concrete for higher grade applications was found out. Design of experiments (DoE) was used to optimize percentage of silica fumes and recycled aggregate to achieve optimum properties of concrete. Equations to predict the properties of concrete were also modelled using regression analysis. More »»

2016

K. N Krishna, Sandeep, S., and Dr. Mini K. M., “Study on concrete with partial replacement of cement by rice husk ash”, IOP Conference Series: Materials Science and Engineering, vol. 149, p. 012109, 2016.[Abstract]


Increase in the demand of conventional construction materials and the need for providing a sustainable growth in the construction field has prompted the designers and developers to opt for ‘alternative materials’ feasible for use in construction. For this objective, the use of industrial waste products and agricultural byproducts are very constructive. These industrial wastes and agricultural by products such as Fly Ash, Rice Husk Ash, Silica Fume, and Slag can be replaced instead of cement because of their pozzolanic behavior, which otherwise requires large tract of lands for dumping. In the present investigation, Rice Husk Ash has been used as an admixture to cement in concrete and its properties has been studied. An attempt was also done to examine the strength and workability parameters of concrete. For normal concrete, mix design is done based on Indian Standard (IS) method and taking this as reference, mix design has been made for replacement of Rice Husk Ash. Four different replacement levels namely 5%, 10%, 15% and 20% are selected and studied with respect to the replacement method. More »»

2016

K. Praveen, Dhanya Sathyan, and Dr. Mini K. M., “Study on performance of concrete with over-burnt bricks aggregates and micro-silica admixture”, IOP Conference Series: Materials Science and Engineering, vol. 149, p. 012061, 2016.[Abstract]


Concrete is made by mixing cement, sand, aggregates and water in required proportion, where aggregates occupy the major volume. Addition of aggregates in concrete improves properties of concrete. With the natural resources depleting rapidly, limiting the use of natural resources and enhancing the use of waste materials is very important for sustainable development. Over-burnt bricks are a waste material which cannot be used in construction directly because of their irregular shape and dark colour. Use of over-burnt bricks helps to preserve natural aggregate source. The present study focuses on the effects of microsilica at various percentages as a partial cement replacement in concrete with over-burnt bricks as coarse aggregates. The mechanical properties of hardened concrete such as splitting tensile strength, flexural strength and compressive strength are studied and analyzed. More »»

2016

Dhanya Sathyan, Dr. Anand K. B., and Dr. Mini K. M., “Experimental Study on Portland Pozzolana Cement-Superplasticiser Compatibility in Mortar”, International Journal of Earth Sciences and Engineering, vol. 09, no. 02, pp. 539-544, 2016.

2015

B. L. P. Dheeraj Swamy, Raghavan, V., Srinivas, K., K Rao, N., Mahadevan Lakshmanan, and Dr. Mini K. M., “Study on Silica Based Carbon Nano Tube Cement Composites’ International Journal of Earth Sciences and Engineering”, International Journal of Earth Sciences and Engineering, 2015.

2014

Dr. Mini K. M., Alapatt, R. John, David, A., Radhakrishnan, A., Cyriac, M., and Ramkrishnan R., “Experimental study on strengthening of R.C beam using glass fibre reinforced composite”, Structural Engineering and Mechanics, Technopress, vol. 50, no. 3, pp. 275-286, 2014.[Abstract]


This paper reports the influence of number of layers and length of GFRP sheets wrapped onto RCC beams for strengthening. Twelve beams of size were cast and tested. Two beams without GFRP and ten beams wrapped in different lay-up patterns with one and two layers of GFRP sheets was subjected to three point loading test and ultrasonic pulse velocity test. Initial crack load, ultimate failure load and types of failure have been observed and noted. Experimental results indicate a significant increase in initial and ultimate load carrying capacity of GFRP wrapped beams compared to unwrapped beams. The failed control specimen was retrofitted using U wrap scheme and tested under three point loading.

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2012

Dr. Mini K. M. and Manne, S., “Neural network paradigms for fatigue strength prediction of fiber-reinforced composite materials”, International journal of Advanced Structural Engineering, 2012.[Abstract]


The paper presents artificial neural network models to evaluate the fatigue life of unidirectional glass fiber-reinforced epoxy-based composites under tension-tension and tension-compression loading. The fatigue behavior of the composite materials was analyzed using three parameters: fiber orientation angle, stress ratio, and maximum stress. These parameters formed the input vectors, and the number of cycles corresponding to the failure was taken as the output parameter for the assessment of the fatigue life. The architecture of the network was selected based on a detailed parametric study and it was trained and tested with data generated analytically using finite element analysis. The predicted results of the neural network model were compared with the available experimental values and were found to be in good agreement. Three different networks such as feedforward, recurrent, and radial basis function networks were used in the present investigation, and a comparative study was carried out to get the optimum network. The significance of the present work is that the same network could be used for assessing the fatigue strength of unidirectional glass/epoxy composite specimens with different fiber orientation angles tested under different stress ratios. More »»

2012

Dr. Mini K. M., Mahadevan Lakshmanan, Mathew, L., and Kaimal, G., “Effect of volume fraction on stability analysis of glass fibre reinforced composite plate”, Steel & Composite structures , vol. 12, no. 2, pp. 117-127, 2012.[Abstract]


This paper deals with an experimental investigation to study the effect of fibre content on the stability of composite plates with various aspect ratios. Epoxy based glass fibre reinforced composite plates with aspect ratio varying from 0.4 to 1 and with volume fractions of 0.36, 0.4, 0.46, 0.49 and 0.55 are used for the investigation. From the study it is observed that for plate with aspect ratio of 0.5 and 0.4 there is no buckling and the plate got crushed at the middle. As the volume fraction increases the buckling load also increases to a limit and then began to reduce with further increase in fibre content. The optimum range of fibre content for maximum stability is found between 0.49 and 0.55. Polynomial expressions are developed for the study of buckling behaviour of composite plates with different volume fractions in terms of load and aspect ratio. More »»

2012

Dr. Mini K. M., Mahadevan Lakshmanan, Mathew, L., and Mukundan, M., “Effect of fibre volume fraction on fatigue behaviour of glass fibre reinforced composite”, Fatigue & Fracture of Engineering Materials & Structures, Wiley Publishing Ltd., vol. 35, no. 12, pp. 1160–1166, 2012.[Abstract]


The aim of this paper is to study the fatigue behavior of GFRP composites manufactured by vacuum bagging process by varying the volume fraction. Constant‐amplitude flexural fatigue tests were performed at zero mean stress, i.e. a cyclic stress ratio R=−1 by varying the frequency of the testing machine. The relationship between stiffness degradation rate and fibre volume fraction, was observed, and the influence of volume fraction on the tensile strength was also investigated. The results show that, as the volume fraction increases the stiffness degradation rate initially decreases and then increases after reaching a certain limit for the volume fraction. Graph between volume fraction and Young's modulus shows that as the volume fraction increases Young's modulus also increases and reaches a limit and then it decreases with further increase in volume fraction, due to the increase in fibre content which changes the material properties of the composite material. The obtained results are in agreement with the available results.

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2010

Dr. Mini K. M. and Pillai, N. N., “Study of Venturi Aerator using Non-dimensional Parameters”, International Journal of Environmental Science and Engineering Research, vol. 1, no. 1, pp. 15-22, 2010.[Abstract]


Among the various types of aerators used for wastewater treatment, venturi aerators have some advantages of simplicity of operation, being free of aerosols and thorough mixing of the tank contents. Air gets aspired through holes at the throat and high oxygen transfer occurs due to intense turbulence in the expansion region. In the present work, tests on a venturi aerator placed above water are conducted and the performance is studied in terms of non-dimensional parameters so that a scale up is possible. KLA the overall oxygen transfer factor, Q the discharge, the oxygen transfer efficiency are expressed as (Kl A)/Q (Re) and E Hc (Re) where Hc is a length parameter and Re is a characteristic Reynolds’s number. The venturi required only a pumping device as mechanical unit and it is very suitable for small waste treatment plants. An example is given here to show how a scale up is possible. More »»

2010

Dr. Mini K. M., .G.Kaimal, M., and N Pillai, N., “Study of Plunging Hollow-jet Aerators using Non-dimensional Parameters”, Institution of Engineers (India)- EN, vol. 91, no. 1, pp. 20-26, 2010.[Abstract]


Plunging hollow jet aerators consist of a cone, which deflects water at the end of a discharging pipe through the annular opening forming a hollow jt on the water surface, thus creating high turbulence and entaring large quantities of air. The effciency E of the device was high ( .5 kg./kWh) for the small opening between the pipe and the cone. The significance of the present work is that, the results are expressed by a graph between the non-dimensional variables. the gap between the cone and the pipe; K L A, the overall transfer factor and Q is the discharge. In addition, the non-dimensuional quantity 'E s' involiving efficiency could be expressed as a function of F 1. the graphs allow the extension of results to a wide range of sizes. More »»

2010

Dr. Mini K. M. and Subramanian, K., “Analysis of Infilled Frames –A Study Using Artificial Neural Network”, International Journal of Design Engineering, vol. 3, no. 1, pp. 77-96, 2010.[Abstract]


A neural network model to determine the failure load and drift of infilled frames under lateral loading is developed in the present paper. The backpropagation neural network is used to evaluate the failure criteria on the infilled frames using the analytically generated data. Training of the network is done by considering the aspect ratio, number of bays, area of column, area of beam, grade of concrete, grade of steel used for the construction and a non-dimensional parameter λh as the input parameters. To validate the efficacy of the model, an experimental investigation was carried out and the results are compared with that obtained using the ANN model. The experimentation is carried out under the same conditions used for the generation of the analytical data. The agreement was found to be good. More »»

2007

Dr. Mini K. M. and Subramanian, K., “Neural Network Model for the Analysis of Infilled Framed Structures”, Archives of Civil Engineering, vol. 53, pp. 639-662, 2007.[Abstract]


The analysis of infilled frames is complex due to the non-linearity involved as well as the large number of variables. Artificial Neural Network (ANN) has been found to be a tool that can accommodate the large number of variables and the nonlinear behaviour of the system. The ANN model was trained using the data available on failure load for the infilled frame under various conditions, generated analytically using equivalent strut method. The so trained model was tested for different set of input and output data obtained analytically as well as experimentally [10]. The agreement between the predicted and the actual results are found to be good. The results show that if the data for training is sufficient, the performance of the network will be satisfactory. The neural network approach is versatile since the size and scope of the input and output vectors can be increased to a large extent to meet the complexities. More »»

2006

Dr. Mini K. M., “Discussion on “Exact Solutions for Sequent Depths Problem”, Journal of Irrigation and Drainage Engineering,ASCE, vol. 132, no. 3, p. 303, 2006.

2005

L. B, Dr. Mini K. M., and S, P. N., “California Bearing Ratio Behaviour of Soil Stabilized Class F Fly Ash Systems”, Journal of Testing and Evaluation, ASTM, vol. 33, pp. 406-410, 2005.[Abstract]


Fly ash is a finely divided mineral residue resulting from the combustion of coal in power plants that occupies large extents of land and also causes environmental problems. Hence, concerted attempts are being made to effectively use fly ash in an environmentally friendly way instead of dumping. Several studies have been carried out for its bulk utilization, such as its addition to improve the California bearing ratio (CBR) of soil in roads and embankments. But a thorough mixing of fly ash with soil may not be possible in the field. Hence a study has been carried out on the CBR behavior of black cotton soil and Raichur fly ash (which is class F) in layers and compared with the same in mixes. The results show that the CBR values of soil-fly ash mixes are better than layers, as expected. To improve the strength of layers, cement is used as an additive to fly ash. The results show that black cotton soil can be improved with stabilized fly ash, solving its strength problem as well as the disposal problem of fly ash. More »»

2005

K. Subramanian, Dr. Mini K. M., and S. Florence, J. Kelvina, “Neural Network Based Modeling of Infilled Steel Frames”, International Journal of Structural Engineering and Mechanics, vol. 21, no. 5, pp. 495-506, 2005.[Abstract]


A neural network based model is developed for the structural analysis of masonry infilled steel frames, which can account for the non-linearities in the material properties and structural behaviour. Using the data available from the analytical methods, an ANN model with input parameters consisting of dimension of frame, size of infill, properties of steel and infill was developed. It was found to be acceptable in predicting the failure modes of infilled frames and corresponding failure load subject to limitations in the training data and the predicted results are tested using the available experimental results. The study shows the importance of validating the ANN models in simulating structural behaviour especially when the data are limited. The ANN model was also compared with the available experimental results and was found to perform well. More »»

Publication Type: Book Chapter

Year of Publication Title

2021

Dr. Mini K. M., “Biofiber composites in building and construction”, in Sustainable Natural Fibers composite: A Green Approach in Engineering and Technology Materials Research Forum LLC (Expected publication in August 2021), 2021.

2021

Dr. Mini K. M., Dhanya Sathyan, and Dr. Jayanarayanan K., “Chapter Three - Hybrid natural fiber composites in civil engineering applications”, in Hybrid Natural Fiber Composites, A. Khan, Rangappa, S. Mavinkere, Siengchin, S., Jawaid, M., and Asiri, A. M., Eds. Woodhead Publishing, 2021, pp. 41-72.[Abstract]


This chapter is aimed to cover the recent developments in hybrid natural fiber composites used in civil engineering and construction. The replacement of synthetic fibers with natural fibers has been one of the most sought after research areas in the recent past. The attributes like the economy, low density with high specific strength and stiffness, biodegradability, renewability, and environment-friendly nature have made natural fibers a viable choice in the civil engineering sector. The application of natural fibers along with synthetic fibers in retrofitting of existing structures, strengthening of concrete and soil are reviewed in this article. The effect of fiber treatment and laying pattern, on the mechanical properties, durability, and weatherability of hybrid natural fiber composites are discussed in detail. The development of novel wood flour filled microfibrillar composites from waste plastics for building materials is also presented.

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Publication Type: Conference Paper

Year of Publication Title

2018

M Pradeep Kumar, Dr. Murali Rangarajan, and Dr. Mini K. M., “Enhancement of Mechanical Properties and Corrosion Behaviour of Concrete due to Addition of Ultrafine GGBS”, in International Conference on Advances in Construction Materials and Systems (ICACMS), RILEM Proceedings Pro118, 2018, p. 221.[Abstract]


The effects of introducing ultrafine ground granulated blast furnace slag (GGBS) on the mechanical properties and the corrosion prevention properties of concrete are examined in this preliminary study. Introducing ultrafine GGBS reduces the workability of concrete, increases the compression strength, and surface bond stress. The ability of ultrafine GGBS to reduce corrosion of the steel rebar in concrete was studied using measurements of half-cell potential, open circuit potential, linear polarization resistance, and Tafel polarization in an accelerated environment 3.5% NaCl and 1 M H2SO4. For 10% addition of ultrafine GGBS, both the half cell and open circuit potentials shifted by about 20 mV, indicating enhanced cathodic protection of the steel rebar. The linear polarization resistance increased by about 50% from 50 K to 100 K by the addition of 10% ultrafine GGBS, while the corrosion current in Tafel polarization measurements reduced by 42%.

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2014

Dr. Mini K. M., Swamy, B. P. L. Dheeraj, Srinivas, K., K Rao, N., and , “Study on CNT based cement composites”, in Paper SE01, Int.national conference on Innovations and Advances in Civil Engineering Towards Green and Sustainable Systems (INACES-2014), Coimbatore Institute of Technology,Coimbatore, 2014.

2009

S. Manne, Mathew, L., and Dr. Mini K. M., “Neural Network Model for the Fatigue Analysis of Fibre Reinforced Composite”, in International Conference on “Operations Research applications in Engineering and Management (ICOREM), ANNA University, Tiruchirappali, 2009.

2006

Dr. Mini K. M. and Subramanian, K., “Analysis of Reinforced Concrete Framed Structures Using Artificial Neural Networks”, in International Confce “Resource Utilisation and Intelligent Systems 174-177, Erode, 2006.

2005

Dr. Mini K. M. and S, P. N., “Assessment of compaction behaviour of soils using artificial neural networks”, in Indian Geotechnical Conference Vol.1, Ahmedabad, 2005.

2005

P. N. S and Dr. Mini K. M., “Institute Determination of Rock Properties for a Steel Plant”, in Case Studies in Geotechnical Engineering, 272-277, 2005.

2005

Dr. Mini K. M. and K, S., “Study of Infilled Framed Structures Using Artificial Neural Networks”, in 5th International Confce AMCM ,Paper No.2/15., Gliwice, Poland, 2005.

2004

J. Kelvina Fl S, K., S., and Dr. Mini K. M., “Analysis of Infilled Frames Using Artificial Neural Network”, in National Confce “Recent Advances in Civil Engineering”, Cochin., 2004.

2003

Dr. Mini K. M. and K., S., “Analysis of Frames Using Artificial Neural Network”, in International Confce “Digital Analysis and Modeling of Systems”, Coimbatore., 2003.

2002

Dr. Mini K. M. and K., S., “Optimal Design of RCC Infilled Frames Using Artificial Neural Network”, in National Confce “Futuristic of concrete technology and optimal design of R.C.C Structures” 193-196, Coimbatore, 2002.

Publication Type: Book

Year of Publication Title

2011

Dr. Mini K. M., Analysis and Assessment of Infilled Frames Using Artificial Neural Networks. Germany : Lambert Academic Publishers, 2011.

Patent Submission

  • “Seismic resistant composite concrete with higher ductility”, Application Number: 201641032716
  • “Process for Manufacturing Plastic Bricks”, 201941015214
  • “An Apparatus for Spraying of Construction Materials”, Patent # 202041014508

Innovation in Teaching and Learning

  • 15CVL111: Introduction to Civil Engineering
    Students are encouraged to present their views about the various specialisations in Civil Engg along with the future aspects in Construction. They were made to read the news related to the present construction techniques. Students are also exposed to "Ethics in Construction" by an experienced Civil Engineer.
    The students become more confident by knowing the vast opportunities available to them.

Invited Talks

  • Resource Person - Faculty Development Programme on “Strength of Materials” organised by Dr NGP Institute of Technology, Coimbatore on June 12-14, 2019
  • Resource Person - National Level Seven-Day Faculty Development   Programme (FDP) on “STRUCTURAL ANALYSIS—II “organised by  PSG Institute of Technology and  Applied Research, Neelambur, Coimbatore-641062 on 24th  - 30th November, 2019
  • Webinar on “Foam concrete-Thermal Insulation Material”, Date: 13-June -2020: Organised by: Amrita School of Engineering.
  • Resource Person - One Week STTP on “Recent Trends in Structural Engineering”- “Strengthening of Concrete Structures – Confinement using FRP” organised by Govt College of Technology, Coimbatore on June 18 -  2020
  • Webinar on  “Fiber reinforced foam concrete as thermal insulation material”, Date: 24- June -2020: Organised by: Baselios Mathews II College of Engineering, Kerala
  • Webinar on“Application of Foam concrete-Thermal Insulation Material”; Date: 8-January -2021: Organiser : Hindusthan College of Engineering and Technology, Coimbatore
  • Webinar on“Fly Ash based Foam Concrete Wall Panels-Thermal Insulation in Building” , Date:22nd  March 2021: Organiser: Ahalia institute of Technology, Palakkad, Kerala
  • Webinar on“Foam concrete- Sustainable Building Material”,  Date:23rd March 2021: Organiser: Karunya University, Coimbatore