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ISSN:2394-3661 | Crossref DOI | SJIF: 5.138 | PIF: 3.854

International Journal of Engineering and Applied Sciences

(An ISO 9001:2008 Certified Online and Print Journal)

Study of Strength Variation of Concrete Using Ureolytic Bacteria

( Volume 3 Issue 4,April 2016 ) OPEN ACCESS

Satinder Kaur Khattra, Manisha Parmar, Urmila Gupta Phutela


This paper presents the results of a study carried out to investigate the ability of ureolytic bacteria to enhance the compressive strength of concrete. The urease producing aerobic alkalophilic bacteria Bacillus subtlis strain MU12 was used in the present study. Ureolytic bacteria used in the present studies were isolated from various sources like cowshed, poultry farm, milk, soil and pigeon dung. All the isolates were screened for ureolytic activity on the basis of urease test. These isolated cultures were purified on phenol red agar plates.  Four different cell concentration (104, 105,106,107 cells/ml) of bacteria were used in making the concrete mixes. Tests were performed for compressive strength of concrete cubes at 7 days, 14 days and 28 days. Inclusion of MU12 @ 107 cells/ ml in cement concrete enhanced the compressive strength in 7th and 14th days concrete samples. 

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