Qualification: 
Ph.D
kb_anand@amrita.edu

Dr. Anand K. B. joined the Amrita School of Engineering in 2010 after a long and distinguished career at the N. S. S.College of Engineering, Palakkad. Dr. Anand received his M. Tech. and Ph. D. degrees from Building Technology & Construction Management division of IIT Madras. He worked at N. S. S. College of Engineering in Palakkad, where he rose from the post of Lecturer to that of Professor. He was actively involved in projects funded by MHRD and Department of Science & Technology, Govt. of Kerala. He also contributed in the BMTPC sponsored research project on “Accelerated Masonry Construction”, at IIT Madras.

Dr. Anand has published many international and national papers. The research paper on Interlocking Block Masonry, published in the Journal of the American Society of Civil Engineers was awarded as the best paper of 2004 by Indian Society for Construction Materials & Structures. He is also in the panel of reviewers for international journals. He has given number of invited lectures on topics related to Building Environment and Climatic Design. His areas of interest include Energy efficiency in buildings, Forensic Engineering, Resource optimization in construction. He has been an examiner for doctoral dissertations and has held crucial positions in academic bodies of various universities.

He is also associated with many professional bodies. For the overall contribution to teaching profession, Dr. Anand received the Best Teacher award from University of Calicut in the academic year 2004-2005.

EDUCATION

  • Ph.D Building Technology & Construction Management Division, Dept. of Civil Engineering, IIT Madras, Chennai, India.

Experience

YEAR AFFILIATION
2013 - Present  Professor, Department of Civil Engineering, Amrita School of Engineering, Coimbatore
2010 - 2013 Chairman, Department of Civil Engineering, Amrita School of Engineering, Coimbatore
1984 - 2010 Career Progression from Lecturer to Professor, N. S. S. College of Engineering in Palakkad.
Served in positions of administrative and academic responsibility.

TECHNICAL SKILL ASSET 

  • Concrete NDT,  Primavera, Revit, SAP

AWARDS/ACHIEVEMENTS/RECOGNITION

  1. Received the Best Teacher award from University of Calicut in the academic year 2004-2005.
  2. Best Technical paper award in 2004 from the Indian Society for Construction Materials & Structures (ISCMS-ECC Award), for the paper published in ASCE Journal of Architectural Engg.

Publications

Publication Type: Journal Article

Year of Publication Title

2019

D. Sathyan and Dr. Anand K. B., “Influence of superplasticizer family on the durability characteristics of fly ash incorporated cement concrete”, Construction and Building Materials, vol. 204, pp. 864-874, 2019.[Abstract]


Nowadays, researchers are focusing on developing more durable cementitious matrices. Major durability problems are associated with sulphate attack, acid attack, chloride penetration etc. The important method to improve the durability characteristics of concrete is to reduce the permeability of concrete by giving good compaction. Superplasticizer addition is one of the methods to improve the workability and thereby reducing the porosity. A large amount of CO 2 is emitted into the atmosphere from the cement plants during the calcination of CaCO 3 and also through the burning of fuel in the kiln. The environmental pollution can be reduced by replacing the cement with the pozzolanic materials like fly ash. Portland pozzolana cement (PPC) is nowadays considered as a sustainable substitute of ordinary portland cement (OPC). The combined influence of pozzolanic and superplasticizer from four different families on the durability properties of concrete and mortar is studied is in this work by conducting laboratory tests like the sorptivity test, acid resistance test, RCPT test and sulphate resistance tests. In this study sorptivity value of the superplasticized mixes are found to be less than that of control specimen without superplasticizer. In all durability related aspects, the mixes with PCE based superplasticizer showed better performance than the control mix and that of mixes with other families of superplasticizer. Improvement in durability characteristics is observed for the mixes containing commercially available PPC compared to the mixes prepared with site blended PPC (ie OPC + 25% FA).

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2019

P. S. S, Sharma, A. K., and Dr. Anand K. B., “Comparative study on synthesis and properties of geopolymer fine aggregate from fly ashes”, Construction and Building Materials, vol. 198, pp. 359-367, 2019.[Abstract]


The growing demand for river sand has caused rapid depletion of this natural resource, and hence it is necessary to find an alternative to replace natural river sand. In this aspect, few recent studies have shown the potential of using geopolymerization reactions to produce fine aggregates using class F fly ash (FFA) to replace natural sand. In this study, an attempt has been made to utilise waste coal ash (class C and class F fly ash) to produce artificial fine aggregate by using geopolymerization reactions. The physical properties of both class C fly ash geopolymer fine aggregate (C-GFA) and class F fly ash geopolymer fine aggregate (F-GFA) were compared with the properties of natural sand and manufactured sand (M-sand). The mortar specimen using C-GFA and F-GFA gained a strength of 83% and 75% of 28-day compressive strength of natural sand mortar cubes and 89.01% and 81% of M-sand mortar cubes respectively. The concrete specimen using C-GFA and F-GFA gained 80.24% and 75% of 28 days compressive strength of natural sand concrete cubes and 83.9% and 77% of M-sand concrete cubes respectively. This study shows that both C-GFA and F-GFA can be used to synthesize alternative fine aggregates to natural sand and M-sand that are used in construction activities. © 2018 Elsevier Ltd

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2018

S. Menon, Dr. Anand K. B., and Sharma, A., “Performance evaluation of alkali activated coal ash aggregate in concrete”, Proceedings of the Institution of Civil Engineers - Waste and Resource Management, vol. 171, pp. 1-32, 2018.[Abstract]


This paper discusses the utilisation of coal-ash (CA) mixtures (bottom ash (BA) and fly ash (FA)) as aggregates for concrete. An optimised mix of BA to FA of 60:40 could produce a basic dense mix of CA suited for aggregates. The aggregates were prepared by pelletisation followed by cold bonding, using the optimised mix blended with cement as a binder. The influence of chemical activators - namely, sodium sulfate and calcium hydroxide - for enhancing, respectively, the reactivity of the CA mix and the pelletisation efficiency was explored in the study. For comparison, two types of aggregates were produced with a higher proportion of either BA or FA. Aggregates were tested for physical and mechanical properties; microstructural and mineralogical aspects were explained through scanning electron microscopy and X-ray diffraction analysis. The performance of CA aggregate concrete and normal concrete were investigated using compressive strength testing. The curing sensitivity of CA aggregate concrete was assessed under different curing regimes - namely, water, air and sealed.

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2018

N. Manomi, Dhanya Sathyan, and Dr. Anand K. B., “Coupled effect of superplasticizer dosage and fly ash content on strength and durability of concrete”, Materials Today: Proceedings, vol. 5, pp. 24033 - 24042, 2018.[Abstract]


The incorporation of fly ash in concrete enhanced the durability of portland cement concrete more effectively. Fly ash is incorporated as a mineral admixture because of its advantageous properties like pozzolanic reaction and pore refinement. At the point when fly ash is added in concrete, calcium hydroxide, liberated during cement hydration, reacts with the reactive silica present in fly ash and forms calcium silicate hydrate(C-S-H) gel. This research investigates the influence of fly ash in conjunction with four different superplasticizers (SP) namely Polycarboxylate ether (PCE), Lignosulphonate (LS), Sulphonated Melamine Formaldehyde (SMF) and Sulphonated Naphthalene Formaldehyde (SNF) and on the mechanical and durability properties of concrete. Concrete was made with different levels of class F flyash replacement (0,15, 25, and 35% by mass) of cement, the w/c ratio were maintained constant as 0.37 and the superplasticizer dosage corresponding to saturation dosage. The saturation dosage of superplasticizer is measured by conducting marsh cone and minislump tests. The mechanical and durability properties tested were compressive strength, splitting tensile strength and Sorptivity. PCE based superplasticizers are found to be more effective. Modification in the mechanical by increase in later age strength and durability properties by increase of the concrete was observed with the addition of fly ash and superplasticizer in control mix

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2018

Sreekesh U. Menon, Dr. Anand K. B., and Dr. Anil Kumar Sharma, “Performance evaluation of alkali-activated coal-ash aggregate in concrete”, Proceedings of the Institution of Civil Engineers - Waste and Resource Management, vol. 171, no. 1, pp. 4-13, 2018.[Abstract]


This paper discusses the utilisation of coal-ash (CA) mixtures (bottom ash (BA) and fly ash (FA)) as aggregates for concrete. An optimised mix of BA to FA of 60:40 could produce a basic dense mix of CA suited for aggregates. The aggregates were prepared by pelletisation followed by cold bonding, using the optimised mix blended with cement as a binder. The influence of chemical activators – namely, sodium sulfate and calcium hydroxide – for enhancing, respectively, the reactivity of the CA mix and the pelletisation efficiency was explored in the study. For comparison, two types of aggregates were produced with a higher proportion of either BA or FA. Aggregates were tested for physical and mechanical properties; microstructural and mineralogical aspects were explained through scanning electron microscopy and X-ray diffraction analysis. The performance of CA aggregate concrete and normal concrete were investigated using compressive strength testing. The curing sensitivity of CA aggregate concrete was assessed under different curing regimes – namely, water, air and sealed.

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2018

R. C Robert, Sathyan, D., and Dr. Anand K. B., “Effect of superplasticizers on the rheological properties of fly ash incorporated cement paste”, Materials Today: Proceedings, vol. 5, pp. 23955-23963, 2018.[Abstract]


The rheology is a study of flow of matter. Rheological behavior of cement paste changes with composition of cement, amount of mineral and chemical admixtures, family of superplasticizer, temperature etc. This paper explores the influence of superplasticizer dosage, superplasticizer family and mineral admixture dosage on the rheological behavior of cement paste. For this purpose cement pastes were prepared at a water cement ratio of 0.37 using OPC and different percentage of fly ash (15, 25, 35) and different dosages of superplasticizer (one from each family). Four families of superplasticizer used for this study are polycarboxylate ether, sulphonate melamine formaldehyde, sulphonate naphthalene formaldehyde and lignosulphates. Rheological tests were performed in a coaxial cylinder viscometer (Brookfield DV-II). Saturation dosage of the superplasticizers in the cement paste mixes with different percentage of fly ash replacement were obtained through marsh cone and mini slump tests on cement paste. Cement pastes were placed in the sample chamber of coaxial cylinder viscometer and shear stress produced measured with known shear rate ranging from 30 S to 65 S-1 applied to the fluid through the spindle. Rheological parameters like yield stress and plastic viscosities were calculated using Bingham and Herschel bulkley model. Change in rheological parameters of the cement paste with fly ash replacement percentage, superplasticizers dosage and family were measured and comparison is made

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2018

S. Aparna, Dhanya Sathyan, and Dr. Anand K. B., “Microstructural and rate of water absorption study on fly-ash incorporated cement mortar”, Materials Today: Proceedings, vol. 5, pp. 23692-23701, 2018.[Abstract]


Today durability is the most concerning factor in the construction field. Durability and strength are mainly controlled by microstructure of the concrete. Dense microstructure with less interconnected pores results in good strength and durable concrete. A dense microstructure can be obtained by providing good compaction, curing and by the use of mineral admixtures. This paper deals with the study on the effect of fly ash addition and superplasticizer dosage and its family in improving the strength, microstructure and durability of mortar. For this purpose mortar is prepared at a water to cement ratio of 0.37 with ordinary portland cement, class F fly ash at different percentage replacement to cement such as 0%, 15%, 25%, and 35% and superplasticizer. The superplasticzer from four different family such as Polycarboxylate ether (PCE), Lignosulphonate (LS), Sulphonated Naphthalene Formaldehyde (SNF) and Sulphonated Melamine Formaldehyde (SMF) is also used in this study. Durability of the mortar is determined by checking the 28th day rate of water absorption in mortar specimen and also by checking the size and connectivity of the pores by means of microscopic study in hardened concrete. There is decrease in 28th day compressive strength for mortar specimen with all levels of fly-ash replacement was observed in this study. Improvement in the compressive strength of the mortar compared to control specimen were observed with the addition of superplasticizer in all levels of addition of fly-ash. A good correlation between the pore size and compressive strength were also observed in this study. © 2018 Elsevier Ltd.

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2018

Dhanya Sathyan, Dr. Anand K. B., and Sindu Menon M, “Temperature influence on rheology of superplasticized pozzolana cement and modeling using RKS algorithm”, Journal of Materials in Civil Engineering, vol. 30, 2018.[Abstract]


Rheology deals with flow and deformation of matter under applied force. The study of rheological response of superplasticized portland pozzolana cement pastes subjected to a stepwise loading at three levels of temperature using Herschel-Bulkley and Bingham flow models is presented here. Rheological tests were done in a temperature-controlled coaxial cylinder viscometer (Brookfield DV-II). Cement pastes were prepared at a water-cement ratio of 0.37 using four types of portland pozzolana cement (PPC) and superplasticizers (SP) of four different families. Saturation dosages of the superplasticizers were obtained through Marsh cone and mini slump tests. Rheological tests were done on superplasticized cement paste mixes for three levels of dosages viz., lower than the saturation dosage, saturation dosage, and higher than the saturation dosage. Cement paste samples were subjected to shear rates ranging from 30 to 65 S-1 in the viscometer and the resultant shear stress was measured. Rheological parameters were obtained at three test temperatures (15, 27, and 35°C) by fitting the second cycle downward flow curves using Bingham model and Herschel-Bulkley model. These parameters were analyzed and used for modeling through random kitchen sink algorithm. The variation of predicted and measured values of the rheological parameters were compared and validated. It was observed that the model could effectively predict the rheological parameters within the experimental domain. © 2018 American Society of Civil Engineers.

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2018

T. J. Chandni and Dr. Anand K. B., “Utilization of recycled waste as filler in foam concrete”, Journal of Building Engineering, vol. 19, pp. 154-160, 2018.[Abstract]


The rapid urbanization has led to the enormous increase in wastes being disposed of. This paper aims at identifying the possibility of using recycled materials such as crushed glass and plastic wastes in foam concrete as a substitute filler for fine river sand. A protein based foaming agent has been adopted for the study. The workability and strength of different mixes, made using preformed foam, at varying densities using powdered glass and plastic wastes have been investigated. Analysis of foam concrete mixes to identify air-void distribution and its relationship to strength has been done. Effect of superplasticizer inclusion and the corresponding change in the water to solids ratio on compressive strength has also been carried out. The study showed that incorporation of recycled wastes is effective to produce foam concrete of strength that will permit its use for bearing wall applications. Incorporation of PCE based superplasticizer was observed to be effective in enhancing the strength of foam concrete. © 2018 Elsevier Ltd

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2018

A. J. Prakash, Sathyan, D., Dr. Anand K. B., and Aravind, N. R., “Comparison of ANN and RKS approaches to model SCC strength”, IOP Conference Series: Materials Science and Engineering, vol. 310, p. 012037, 2018.[Abstract]


Self compacting concrete (SCC) is a high performance concrete that has high flowability and can be used in heavily reinforced concrete members with minimal compaction segregation and bleeding. The mix proportioning of SCC is highly complex and large number of trials are required to get the mix with the desired properties resulting in the wastage of materials and time. The research on SCC has been highly empirical and no theoretical relationships have been developed between the mixture proportioning and engineering properties of SCC. In this work effectiveness of artificial neural network (ANN) and random kitchen sink algorithm(RKS) with regularized least square algorithm(RLS) in predicting the split tensile strength of the SCC is analysed. Random kitchen sink algorithm is used for mapping data to higher dimension and classification of this data is done using Regularized least square algorithm. The training and testing data for the algorithm was obtained experimentally using standard test procedures and materials available. Total of 40 trials were done which were used as the training and testing data. Trials were performed by varying the amount of fine aggregate, coarse aggregate, dosage and type of super plasticizer and water. Prediction accuracy of the ANN and RKS model is checked by comparing the RMSE value of both ANN and RKS. Analysis shows that eventhough the RKS model is good for large data set, its prediction accuracy is as good as conventional prediction method like ANN so the split tensile strength model developed by RKS can be used in industries for the proportioning of SCC with tailor made property.

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2018

Dhanya Sathyan, Dr. Anand K. B., Jose, C., and Aravind, N. R., “Modelling the minislump spread of superplasticized PPC paste using RLS with the application of Random Kitchen sink”, IOP Conference Series: Materials Science and Engineering, vol. 310, 2018.[Abstract]


Super plasticizers(SPs) are added to the concrete to improve its workability with out changing the water cement ratio. Property of fresh concrete is mainly governed by the cement paste which depends on the dispersion of cement particle. Cement dispersive properties of the SP depends up on its dosage and the family. Mini slump spread diameter with different dosages and families of SP is taken as the measure of workability characteristic of cement paste chosen for measuring the rheological properties of cement paste. The main purpose of this study includes measure the dispersive ability of different families of SP by conducting minislump test and model the minislump spread diameter of the super plasticized Portland Pozzolona Cement (PPC)paste using regularized least square (RLS) approach along with the application of Random kitchen sink (RKS) algorithm. For preparing test and training data for the model 287 different mixes were prepared in the laboratory at a water cement ratio of 0.37 using four locally available brand of Portland Pozzolona cement (PPC) and SP belonging to four different families. Water content, cement weight and amount of SP (by considering it as seven separate input based on their family and brand) were the input parameters and mini slump spread diameter was the output parameter for the model. The variation of predicted and measured values of spread diameters were compared and validated. From this study it was observed that, the model could effectively predict the minislump spread of cement paste. © Published under licence by IOP Publishing Ltd.

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2018

K. Kiran and Dr. Anand K. B., “Study on identically voided pervious concrete made with different sized aggregates”, IOP Conference Series: Materials Science and Engineering, vol. 310, p. 012064, 2018.[Abstract]


Pervious concrete (PC) is also known as no fines concrete and has been found to be a reliable stormwater management tool. As a substitution for conventional impervious pavement, PC usage has been increasing during recent years. PC made with different sized aggregate shows different void ratios and changed properties. As void ratio plays a notable role on strength and permeability of PC, this study aims to focus on properties of PC at identical void ratio of 20%, made using aggregates of three size ranges, viz., 4.75-6mm, 10-12.5mm, and 10-20mm. Appropriate alternatives were used to maintain the identical void ratio. As the permeation capacity of PC gets reduced due to the clogging tendency, the life of PC will also get reduced. Hence, to make the PC to sustain for a long time it is necessary to study the clogging behavior. This study investigates the tendency of PC for clogging and the potential for regaining the permeability through de-clogging methods. Clogging tendency of PC is studied by using two sizes (coarse and fine) of clog particles and the changes in permeability are observed. Efficiency of declogging methods like pressure washing and vacuum suction on PC with different sized aggregates are also evaluated.

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2018

D. Sathyan, Dr. Anand K. B., 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

Dhanya Sathyan, Dr. Anand K. B., Aravind J. Prakash, and B. Premjith, “Modeling the Fresh and Hardened Stage Properties of Self-Compacting Concrete using Random Kitchen Sink Algorithm”, International Journal of Concrete Structures and Materials, vol. 12, 2018.[Abstract]


High performance concrete especially self compacting concrete (SCC) has got wide popularity in construction industry because of its ability to flow through congested reinforcement without segregation and bleeding. Even though European Federation of National Associations Representing for Concrete (EFNARC) guidelines are available for the mix design of SCC, large number of trials are required for obtaining an SCC mix with the desired engineering properties. The material and time requirement is more to conduct such large number of trials. The main objective of the study presented in this paper is to demonstrate use of regularized least square algorithm (RLS) along with random kitchen sink algorithm (RKS) to effectively predict the fresh and hardened stage properties of SCC. The database for testing and training the algorithm was prepared by conducting tests on 40 SCC mixes. Parametric variation in the SCC mixes were the quantities of fine and coarse aggregates, superplasticizer dosage, its family and water content. Out of 40 test results, 32 results were used for training and 8 set results were used for testing the algorithm. Modelling of both fresh state properties viz., flowing ability (Slump Flow), passing ability (J Ring), segregation resistance (V funnel at 5 min) as well as hardened stage property (compressive strength) of the SCC mix was carried out using RLS and RKS algorithm. Accuracy of the model was checked by comparing the predicted and measured values. The model could accurately predict the properties of the SCC within the experimental domain. © 2018, The Author(s).

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2018

Saranya Raj S, Dr. Anil Kumar Sharma, and Dr. Anand K. B., “Performance appraisal of coal ash stabilized rammed earth”, Journal of Building Engineering, vol. 18, pp. 51-57, 2018.[Abstract]


Rammed earth construction is an ancient technique which when combined with modern methods could bring substantial improvement in the construction of buildings. This paper presents a study on the strength and durability aspects of coal ash stabilized rammed earth intensifying on the utilization of industrial waste for a sustainable method of construction. At first, compaction studies were done with different combinations of bottom ash (BA) and fly ash (FA) mixtures to obtain an optimum content for use as binder. The optimized amount of binder was then added to soil in varying proportions along with cement to determine the compaction behavior. From the compaction results, 30% of binder content was proposed for stabilization of the rammed earth and all the further studies were carried out by adding this amount of binder. Unconfined compressive strength of the stabilized soil was determined after 7, 14, 28, 45 and 60 days which showed significant improvement in comparison to the pure soil. Microstructural and mineralogical studies were done to affirm the strength test results and to determine the effect of binders on soil stabilization. Compression tests on stabilized rammed earth were also conducted using large cylinders and masonry prisms after 28 days of curing. Durability of the stabilized soil was assessed through spray erosion test which showed their effectiveness in resistance to erosion. Coal ash stabilized soil showed promising results for their utilization in rammed earth construction. © 2018 Elsevier Ltd

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2017

Dr. Anand K. B. and S, G. K., “Performance evaluation of PVA fibre reinforced concrete”, Indian Concrete Journal, vol. 91, pp. 30-36, 2017.[Abstract]


As conventional concrete is sensitive to varying exposure conditions, this paper aims to study the effect of incorporation of Polyvinyl Alcohol (PVA) fibers at different volume fractions (Vf) of 0.15%, 0.3% and 0.45% by total volume in concrete to enhance strength, impact and abrasion resistance as well as sorption and shrinkage characteristics. Results show significant improvement of mechanical properties and remarkable reduction in sorptivity and shrinkage with moderate volume incorporation of PVA fibers. Enhanced properties indicate PVA FRC as a prospective material for rigid pavements. A relative design evaluation adopting PVA FRC as a rigid pavement slab material is also presented.

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2017

Dr. Anand K. B., “PVA fiber - Fly ash cementitious composite: Assessment of mechanical properties”, International Journal of Civil Engineering and Technology, vol. 8, no. 10, pp. 647-658, 2017.[Abstract]


Engineered cementitious composites (ECC) come under the category of high performance fiber reinforced cementitious composites (HPFRCC), exhibiting high ductility and strain hardening behavior. ECC generally consumes high volumes of cement and hence causes harmful impact on environment. This paper is aimed to highlight the mechanical behaviour of fly ash - cementitious composite incorporating Polyvinyl Alcohol (PVA) fiber. The PVA fiber volume fraction (Vf) was maintained at 1% of total volume of the composite. Though there is a reduction in compressive strength with increase in fly ash content, tensile strain capacity of about 1.2 % was achieved for 20% fly ash replacement for cement. At this flyash replacement level, higher content of fiber (1.5% and 2%) was tried and at Vf of 2%, tensile strain capacity of 2.3% could be achieved.

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2017

Sindu Menon M, Dhanya Sathyan, and Dr. Anand K. B., “Studies on Rheological Properties of Superplasticised PPC Paste”, International Journal of civil engineering and Technology, vol. 8, no. 10, pp. 939-947, 2017.[Abstract]


Rheology is the science which deals with flow and deformation of matter under applied force. The study of rheological response of superplasticised PPC pastes subjected to a stepwise loading at a constant temperature using different flow models is presented here. Rheological tests are done in temperature controlled Coaxial Cylinder Viscometer (Brookfield DV-II) to determine the parameters which in turn describe the flow behaviour. Mix prepared at water-binder ratio of 0.37 using two brands Portland Pozzolana Cement (PPC) and Superplasticisers (SP) of four different families namely Polycarboxylate Ether, Sulphonated Melamine Formaldehyde, Sulphonated Naphthalene Formaldehyde and Lignosulphates were used for the study. The tests were done on 5 mixes in each superplasticiser, one on the optimum dosage obtained and the remaining were on the dosage values lower and higher than the optimum dosage. Optimum dosage of the superplasticiser was obtained from the empirical tests like mini slump test and marsh cone tests. Cement pastes were placed in the sample chamber of coaxial cylinder viscometer and shear stress produced when a known shear rate applied to the fluid through spindle is measured at a constant temperature of 27°C. Two loading and unloading cycles were imposed by increasing, and later decreasing the shear rate. The response of downward curve of the second cycle is used for determining the rheological parameters. Rheological parameters obtained at constant test temperature by fitting the second cycle downward flow curves using Bingham model and Herschel Bulkley model are compared.

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2017

A. Suresh and Dr. Anand K. B., “Strength and Durability of Rammed Earth for Walling”, Journal of Architectural Engineering, vol. 23, 2017.[Abstract]


Earthen building construction is an energy-efficient, environmentally friendly, and sustainable approach. Even though rammed-earth construction is popular in a few countries, it is not widely practiced in many countries, including India. The broader aim of the study was to overcome skepticism toward this ecological construction method and increase the confidence level in the society for practicing the same. The quantities of cement and water needed for stabilization of locally available soil were optimized, and durability was evaluated through weathering tests and dryingshrinkage tests. The strength and elastic properties of the stabilized rammed earth were also assessed. This paper presents a preliminary investigation of finite-element modeling (FEM) of the compression behavior of a rammed-earth prism and its experimental validation. © 2017 American Society of Civil Engineers.

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2017

S. Gopinathan and Dr. Anand K. B., “Properties of cement grout modified with ultra-fine slag”, Frontiers of Structural and Civil Engineering, pp. 1-9, 2017.[Abstract]


The purpose of the study is to obtain a cement grout with improved performance. The grout mixes of the present study contain cement, ultra-fine slag (UFS), super plasticizer and water. Properties like flowability, bleeding, compressive strength and shrinkage of cement grouts have been studied. Rheological parameters were also studied in order to explain the grout workability. The results show that, cement replacement with slag in grouts could reduce bleeding substantially without affecting the workability of the mixes. Introduction of slag enhanced the compressive strength and reduced shrinkage reasonably. Ultra-fine slag can be used as a supplementary cementitious material in cementitious grouts in order to improve the grout behavior. © 2017 Higher Education Press and Springer-Verlag Berlin Heidelberg.

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2016

S. Menon.M, Dhanya Sathyan, and Dr. Anand K. B., “Rheological properties of superplasticized portland pozzolana cement paste”, ESTIS 2016, 2016.

2016

C. Jose, Dhanya Sathyan, and Dr. Anand K. B., “Modelling Marsh cone flow time of superplasticized PPC paste –using RLS with the application of RKS”, ESTIS 2016, 2016.

2016

A. .J.Prakash, Dhanya Sathyan, Dr. Anand K. B., and .B, P., “Prediction of passing ability of self compacting concrete: Regularized least square approach”, ESTIS 2016, 2016.

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.

2005

Dr. Anand K. B. and .Ramamurthy, K., “Development and evaluation of hollow concrete interlocking block masonry system”, The Masonry Society Journal, USA, pp. 11-19, 2005.

2003

Dr. Anand K. B. and .Ramamurthy, K., “Laboratory based productivity studies on alternative masonry systems”, Journal of Construction Engineering and Management, vol. 129, no. 3, 2003.[Abstract]


Masonry construction over the last century has undergone radical changes that have led to specific improvements in construction performance due to the advent of large-sized blocks, innovative methods like surface-bonded masonry, partially grouted masonry, and dry-stacked/mortarless masonry using interlocking blocks. This paper outlines relative productivity assessment of conventional and interlocking-block masonry with different construction methods. To measure the utilization of time by the members of the team, work sampling (adopting the 5 min rating technique) was used. The frequencies of occurrences of each work category, namely direct, indirect, and noncontributory, have been established. Due to the variation in the noncontributory work component for different methods of construction, the net output has been expressed as output per productive hour. Productivity enhancement of 80–120% was observed for dry-stacked masonry and 60–90% more for thin-jointed and mortar-bedded interlocking-block masonry than that of conventional masonry. More »»

2003

Dr. Anand K. B., Vasudevan, V., and .Ramamurthy, K., “Water permeability assessment of alternative masonry systems”, Building and Environment, vol. 37, pp. 947-957, 2003.[Abstract]


This paper discusses water penetration resistance studies on conventional brick/block masonry for variations in construction types and materials adopting ASTM E 514-90 procedure. The behaviour of interlocking block masonry for the influence of type of bedding (dry-stacking, thin-jointing, and mortar-bedding), surface finishes (stucco/plaster finish) have been investigated. Also the relative performance of solid as well as hollow interlocking block masonry system developed by the authors, with conventional masonry is reported. More »»

2001

Dr. Anand K. B. and Ramamurthy, K., “Influence of Construction Method on Water Permeation of Interlocking Block Masonry ”, Journal of Architectural Engineering, vol. 7, no. 2, pp. 52-56, 2001.[Abstract]


This technical note discusses water penetration resistance studies on a solid interlocking block masonry system, adopting ASTM E 514-90 for the influence of the type of bedding (dry stacking, thin jointing, and mortar), surface finishes (stucco and plaster on one side or both sides), and simulated wind velocities (0, 50, and 100 km/h). Silblock masonry without a surface finish is suitable for rain protected and interior walls. Introduction of any form of mortar bedding (thin jointing or conventional) resulted in higher dampness than the dry-stacked specimens. With respect to dampness, plastered dry-stacked masonry performs better, whereas with respect to leakage, plastered thin-jointed masonry performs better. More »»

Publication Type: Conference Paper

Year of Publication Title

2018

G. Krishnan and Dr. Anand K. B., “Industrial waste utilization for foam concrete”, in IOP Conference Series: Materials Science and Engineering, 2018, vol. 310.[Abstract]


Foam concrete is an emerging and useful construction material - basically a cement based slurry with at least 10% of mix volume as foam. The mix usually containing cement, filler (usually sand) and foam, have fresh densities ranging from 400kg/m3 to 1600kg/m3. One of the main drawbacks of foam concrete is the large consumption of fine sand as filler material. Usage of different solid industrial wastes as fillers in foam concrete can reduce the usage of fine river sand significantly and make the work economic and eco-friendly. This paper aims to investigate to what extent industrial wastes such as bottom ash and quarry dust can be utilized for making foam concrete. Foam generated using protein based agent was used for preparing and optimizing (fresh state properties). Investigation to find the influence of design density and air-void characteristics on the foam concrete strength shows higher strength for bottom ash mixes due to finer air void distribution. Setting characteristics of various mix compositions are also studied and adoption of Class C flyash as filler demonstrated capability of faster setting. © Published under licence by IOP Publishing Ltd.

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2018

R. Gowri and Dr. Anand K. B., “Utilization of fly ash and ultrafine GGBS for higher strength foam concrete”, in IOP Conference Series: Materials Science and Engineering, 2018, vol. 310.[Abstract]


Foam concrete is a widely accepted construction material, which is popular for diverse construction applications such as, thermal insulation in buildings, lightweight concrete blocks, ground stabilization, void filling etc. Currently, foam concrete is being used for structural applications with a density above 1800kg/m3. This study focuses on evolving mix proportions for foam concrete with a material density in the range of 1200 kg/m3 to 1600 kg/m3, so as to obtain strength ranges that will be sufficient to adopt it as a structural material. Foam concrete is made lighter by adding pre-formed foam of a particular density to the mortar mix. The foaming agent used in this study is Sodium Lauryl Sulphate and in order to densify the foam generated, Sodium hydroxide solution at a normality of one is also added. In this study efforts are made to make it a sustainable construction material by incorporating industrial waste products such as ultrafine GGBS as partial replacement of cement and fly ash for replacement of fine aggregate. The fresh state and hardened state properties of foam concrete at varying proportions of cement, sand, water and additives are evaluated. The proportion of ultrafine GGBS and fly ash in the foam concrete mix are varied aiming at higher compressive strength. Studies on air void-strength relationship of foam concrete are also included in this paper. © Published under licence by IOP Publishing Ltd.

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2018

A. K. Joseph and Dr. Anand K. B., “Mechanical Properties and Shear Strengthening Capacity of High Volume Fly Ash-Cementitious Composite”, in IOP Conference Series: Materials Science and Engineering, 2018, vol. 310.[Abstract]


This paper discusses development of Poly Vinyl Alcohol (PVA) fibre reinforced cementitious composites taking into account environmental sustainability. Composites with fly ash to cement ratios from 0 to 3 are investigated in this study. The mechanical properties of HVFA-cement composite are discussed in this paper at PVA fiber volume fraction maintained at 1% of total volume of composite. The optimum replacement of cement with fly ash was found to be 75%, i.e. fly ash to cement ratio (FA/C) of 3. The increase in fiber content from 1% to 2% showed better mechanical performance. A strain capacity of 2.38% was obtained for FA/C ratio of 3 with 2% volume fraction of fiber. With the objective of evaluating the performance of cementitious composites as a strengthening material in reinforced concrete beams, the beams deficient in shear capacity were strengthened with optimal mix having 2% volume fraction of fiber as the strengthening material and tested under four-point load. The reinforced concrete beams designed as shear deficient were loaded to failure and retrofitted with the composite in order to assess the efficiency as a repair material under shear. © Published under licence by IOP Publishing Ltd.

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