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Advances in Civil Engineering
Volume 2014 (2014), Article ID 435948, 7 pages
http://dx.doi.org/10.1155/2014/435948
Research Article

Achievement of Early Compressive Strength in Concrete Using Sporosarcina pasteurii Bacteria as an Admixture

1National Institute of Construction Management and Research (NICMAR), Pune 411045, India
2Manipal Institute of Technology, H.No. 1-3-72 Janda galli, Banswada, Nizamabad, Telangana 503187, India

Received 21 February 2014; Revised 6 August 2014; Accepted 20 August 2014; Published 11 September 2014

Academic Editor: Andreas Kappos

Copyright © 2014 Rakesh Chidara et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Often it is observed, attainment of early compressive strength in concrete is a challenge. Researchers have tried various admixtures to achieve the objective. This work addresses the issue of achieving early compressive strength in concrete using a bacterium called Sporosarcina pasteurii. The bacterium is characterised with the ability to precipitate calcium carbonate in the presence of any carbonate source and is known for its resistive capacity in extreme temperature and pressure zones. To establish the objective of gain in early strength around 192 concrete cubes were tested at 3, 7, 14, and 28 days and the results compared with controlled concrete. The bacterium was used in combination of chemicals and the dosage proportions were altered to achieve the desired M20 compressive strength at 28 days.