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IJEB Vol.44(04) [April 2006] >

Title: Development of bioconcrete material using an enrichment culture of novel thermophilic anaerobic bacteria
Authors: Ghosh, P
Mandal, S
Pal, S
Bandyopadhyaya, G
Chattopadhyay, B D
Keywords: Aanaerobic bacteria
Compressive strength
Microbial precipitation
Thermophilic bacteria
Issue Date: Apr-2006
Publisher: CSIR
Abstract: In the biosphere, bacteria can function as geo-chemical agents, promoting the dispersion, fractionation and/or concentration of materials. Microbial mineral precipitation is resulted from metabolic activities of microorganisms. Based on this biomineralogy concept, an attempt has been made to develop bioconcrete material incorporating of an enrichment culture of thermophilic and anaerobic bacteria within cement-sand mortar/concrete. The results showed a significant increase in compressive strength of both cement-sand mortar and concrete due to the development of filler material within the pores of cement sand matrix. Maximum strength was observed at concentration 105cell/ml of water used in mortar/concrete. Addition of Escherichia coli or media composition on mortar showed no such improvement in strength.
Page(s): 336-339
ISSN: 0975-1009 (Online); 0019-5189 (Print)
Source:IJEB Vol.44(04) [April 2006]

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