An Experimental Study on Performance of Bacteria in Concrete
C.Mohanasundharam , R.Jeevakkumar, K.Shankar
Concrete is the most commonly used building material, the cracks in concrete create problem. Cracks in concrete occur due to various mechanisms such as - shrinkage, freeze-thaw reactions and mechanical compressive and tensile forces. Cracking of the concrete surface may enhance the deterioration of embedded steel bars as ingression rate of corrosive chemicals such as water and chloride ions in to the concrete structure increased. Therefore a novel technique has been developed by using a selective microbial plugging process. One such thought has lead to the development of a very special concrete known as Bacterial Concrete where bacteria is induced in the mortars and concrete to heal up the faults. In this study, Bacillus Sphaericus bacteria of concentration 1x106 cells/ml are used. The properties of control concrete and bacterial concrete are studied by conducting various tests such as compressive strength, split tensile strength, flexural test with varying grades of concrete M20, M25, M30. This study showed a significant increase in the strength was observed due to the addition of bacteria for a cell concentration of 106 cells per ml of mixing water and therefore calcium carbonate precipitation deposited in micro cracks.
 International Journal Of Advanced Biotechnology And Research, ISSN 0976-2612, VOL 3, ISSUE 1, 2012, PP 541-544, “Potential Application Of Bacteria To Improve The Strength Of Cement Concrete”, Author: C. C. Gavimath, B. M. Mali, V. R. Hooli, J. D. Mallpur , A. B. Patil , D. P. Gaddi, C.R.Ternikar.
 “Improvement Of Concrete Durability By Bacterial Mineral Precipitation”, V. Ramakrishnan, Ramesh K. Panchalan & Sookie S. Bang.
 Concrete Repair, Rehabilitation And Retrofitting Ii, Isbn 978-0-415- 46850-3 “Crack Repair In Concrete Using Biodeposition”, N. Debelie & W. De Muynck.
 Second International Conference On Sustainable Construction Materials And Technologies, June 28-30, 2010. “Potential Of Applying Bacteria To Heal Cracks In Concrete”, J.Y. Wang, K. Van Tittelboom, N. De Belie And W. Verstraete.
 International Journal Of Engineering Science & Technology, Vol. 2(3), 2010, 270-277. “Studies On The Characterisation Of Biosealant Properties Of Bacillus Sphaericus”, Author:Kantha D.Arunachalam, K.S.Sathyanarayanan, B.S.Darshan, R.Balaji Raja.
 Asian Journal Of Civil Engineering (Building And Housing) Vol. 11, No. 1 (2010) Pages 43-55 “Performance Of Standard Grade Bacterial (Bacillus Subtilis) Concrete”, S. Sunil Pratap Reddy, M.V. Seshagiri Rao, P. Aparna And Ch. Sasikala.
 International Journal Of Advances In Engineering & Technology, March 2013. “Bio Mineralisation Of Calcium Arbonate By Different Bacterial Strains And Their Application In Concrete Crack Remediation”, Jagadeesha Kumar B G, R Prabhakara, Pushpa.
 African Journal Of Biotechnology, Vol. 10(42), Pp. 8359-8372, 8 August, 2011, “Calcium Carbonate Precipitation By Different Bacterial Strains”, Navneet Chahal, Anita Rajor And Rafat Siddique.
 Academic Journal Of Entomology 4(1): 17-22, 2011,Issn 1995-8994, “Occurrence And Distribution Of Mosquitocidal Bacillus Sphaericus In Soil”, A. Surendran And S. John Vennison
[C.Mohanasundharam, R.Jeevakkumar, K.Shankar (2014), An Experimental Study on Performance of Bacteria in Concrete, International Journal of Innovative Research in Computer Science & Technology (IJIRCST), Vol-2, Issue-6, Page No-1-5], (ISSN 2347 - 5552). www.ijircst.org
Assistant Professors in Civil Engineering, Muthayammal Engineering College, Rasipuram, Namakkal,Tamil Nadu, India.