Qualification: 
Ph.D, M.Tech
smita_singh@blr.amrita.edu

Dr. Smita Singh serves as Assistant Professor at the department of Civil Engineering at Amrita School of Engineering, Bengaluru. Dr. Singh is also serving the role of Academic Coordinator at Bengaluru campus.

She completed her B.Tech. at NIT Patna with distinction in 1998, M.E. in Structural Engineering in 2008 and Ph.D. in 2019. Dr. Singh started her career as a Design Engineer at Stup Consultants Pvt. Limited and was involved in foundation, substructure and superstructure design of Bangalore Metro. During her academic career of more than 10 years till now, Dr. Singh has taught various subjects at UG levels and has edited 2 conference proceedings and organised 4 International Conferences. Her key research area is Geopolymer Technology using industrial wastes. She has published more than 10 papers in International Journals which includes paper in Construction and Building Materials with impact factor of 4.7 and 15 papers in proceedings of International / National conferences.Dr. Singh has guided several Dissertations/Projects at UG level and presently guiding one Ph.D.

Education

  • 2019: Ph.D. in Structural Engineering
    From: Visvesvaraya Technological University
  • 2008: M.Tech. in Structural Engineering
    From: Bangalore Institute of Technology
  • 1998: B.Tech.
    From: NIT Patna

Professional Appointments

Year

Affiliation

1/7/2007 to 31/3/2008

Design Engineer at Arch Noveau

20/4/2008 to 9/7/2010

Design Engineer at Stup Consultants P. Ltd

12/7/2010 till date

Amrita School of Engineering, Bengaluru

Publications

Publication Type: Conference Proceedings

Year of Publication Title

2021

Dr. Smita Singh and Dr. Amrita Thakur, “Red mud based binder: A sustainable material for removal of chromium (VI) from water”, Materials Today: Proceedings. 2021.

2016

Dr. Smita Singh, Basavanagowda, S. N., Aswath, M. U., and Ranganath, R. V., “Durability of Bricks Coated with Red mud Based Geopolymer Paste”, IOP Conference Series: Materials Science and Engineering, vol. 149. IOP Publishing, p. 012070, 2016.[Abstract]


The present study is undertaken to assess the durability of concrete blocks coated with red mud - fly ash based geopolymer paste. Concrete blocks of size 200 x 200 x 100mm were coated with geopolymer paste synthesized by varying the percentages of red mud and fly ash. Uncoated concrete blocks were also tested for the durability for comparison. In thermal resistance test, the blocks were subjected to 600°C for an hour whereas in acid resistance test, they were kept in 5% sulphuric acid solution for 4 weeks. The specimens were thereafter studied for surface degradation, strength loss and weight loss. Pastes with red mud percentage greater than 50% developed lot of shrinkage cracks. The blocks coated with 30% and 50% red mud paste showed better durability than the other blocks. The use of blocks coated with red mud - fly ash geopolymer paste improves the aesthetics, eliminates the use of plaster and improves the durability of the structure.

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2016

Dr. Smita Singh, Aswath, M. U., and Ranganath, R. V., “Durability of Red Mud Based Geopolymer Paste in Acid Solutions”, 2016 the First International Conference on Civil Engineering and Materials Science. Trans Tech Publications Ltd, 2016.[Abstract]


The present investigation is on the effect of red mud on the mechanical properties and durability of the geopolymer paste in sulphuric and acetic acid solution. Red mud and fly ash were used to form the geopolymer paste along with the alkalies. The variation of red mud in the paste composition was from 0% to 90%. Cylindrical shaped specimens of 1 inch diameter and 1 inch height were prepared. The specimens were immersed in 5% sulphuric acid and 5% acetic acid for 1, 7, 14, 28, 56 and 84 days and tested for weight loss, visual deformation, strength loss and colour of the solvent, based on the procedure specified by ASTM C 267 – 01. SEM/EDX Tests were performed on the geopolymer specimens. Test results show that initially, the strength of the geopolymer increased upon the addition of red mud. The strength was maximum when the percentage of red mud was 30%. The maximum strength obtained was 38 MPa for the paste containing 30% red mud using 10M alkali solution as against 31.69 MPa, when only fly ash was used. Geopolymer paste containing 30% and 50% red mud showed better resistance to acid attack. The strength loss was minimum for the samples containing 30% red mud in both inorganic and organic acid i.e. sulphuric and acetic acid.

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Publication Type: Journal Article

Year of Publication Title

2020

Dr. Smita Singh, “Performance assessment of red mud based geopolymer bricks and prisms”, ,” J. Build. Eng., p. 101462, 2020.

2019

Dr. Smita Singh, Aswath, M., Biswas, R., Ranganath, R., Choudhary, H., Kumar, R., and Sahoo, B., “Role of iron in the enhanced reactivity of pulverized Red mud: Analysis by Mössbauer spectroscopy and FTIR spectroscopy”, Case Studies in Construction Materials, vol. 11, 2019.[Abstract]


Abstract The present study is carried out to investigate the contribution of iron in the hematite phase in enhancing the reactivity of red mud. Compressive strength test was performed on the binder synthesized from both unpulverized and pulverized red mud. The results indicated an increase in strength of the pulverized red mud based binder. Test results of Mossbauer Spectroscopy showed transition of metastable ferrihydrite phase to hematite phase when the red mud was processed. An increase in line-width of the Moessbauer sextet and an increase in the area of doublet of pulverized red mud based binder hinted at the increase in Fe 3+ ions which could have replaced Al 3+ ions in the geopolymer network. Results of Fourier-Transform Infrared Spectroscopy (FTIR) test validated the Mossbauer Spectroscopy results. The participation of Fe 3+ ions in geopolymerisation was confirmed from the reduction of hematite peak (wavenumber at 462 cm −1 ).

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2018

Dr. Smita Singh, Aswath, M. U., and Ranganath, R. V., “Effect of mechanical activation of red mud on the strength of geopolymer binder”, Construction and Building Materials, vol. 177, pp. 91-101, 2018.[Abstract]


<p>The growing interest in utilization of industrial waste and green construction has motivated the present work. Red mud is an industrial waste produced in the process of extraction of aluminum from bauxite by Bayer's process. The paper presents the studies conducted to assess the influence of mechanical activation of red mud and curing methods on the strength of red mud-fly ash geopolymer paste. Red mud was used in both unprocessed and pulverised form and the alkali activated paste samples were cured thermally as well as in ambient condition. The percentage of red mud varied from 0 to 90% and alkalinity from 6 M to 12 M NaOH solution. X-ray diffraction (XRD) was carried out to identify the mineral phases in pulverised and unprocessed red mud. SAED (selective area diffraction diagram) test was done on the red mud, along with SEM (scanning electron microscopy), TEM (transmission electron microscopy) and HRTEM analysis (high resolution transmission electron microscopy) to study the effect of mechanical activation and validate the experimental findings. Mechanical activation increased the reactivity of silica and the hematite phase of red mud as reflected in the silica reactivity and Fourier transform infrared spectroscopy (FTIR) test results. Use of pulverised red mud enhanced the mechanical properties of ambient cured paste and the specimens possessed maximum 7 day compressive strength of 40 MPa at 6 M alkalinity with 30% mechanically activated red mud content. © 2018 Elsevier Ltd</p>

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2017

Dr. Smita Singh, “Effect of Curing Methods on the Property of Red Mud Based Geopolymer Mortar”, International Journal of Civil Engineering and Technology (IJCIET), , vol. 8, no. 10, 2017.

Keynote Addresses/Invited Talks/Panel Memberships

Delivered an invited talk on Green buildings on the occasion of 150th birthday celebration of Sir M. Visvesvaraya at the Institution of Engineers, Bangalore chapter.

Courses Taught

  • Engineering Mechanics, Mechanics of Solids, Engineering Drawing

Student Guidance

Undergraduate Students

Sl. No.

Name of the Student(s)

Topic

Status

Year of Completion

1

G.Harsha Vardhan, B.Vamshi Krishna, Ch.Sai Naveen, B.Revanth

Design Optimisation of Bridge Pier Bearing

completed

2020

2

Arunkumar S., H. Maduvanth, Lokesh A., M. Vishnu

Purification of Water Containing Heavy Metals Using Red Mud

completed

2020

Research Scholars

Sl. No.

Name of the Student(s)

Topic

Status

Year of Completion

1.

V.S. Ch. S.G. Sastry

Under finalisation

Ongoing

-