MICROBIAL ACTIVITY ON MICROSTRUCTURES OF CONCRETE
Bioconcrete has now become an important area of research in the field of concretetechnology to solve the problem of self-healing. Specific microbial communities, owing totheir biomineralization property, produce or leach biomaterials or some other materials insidethe concrete matrices and change its chemistry. This leads to a new dimension in concretetechnology by the development of self-healing, eco friendly and more durable concretematerial, known as bioconcrete. A novel thermophilic and anaerobic bacterium isolated fromBakreshwar hot springs shows that on addition of this bacterium to the cement-sand mortar orconcrete, the overall behavior of the concrete could be improved substantially. A silicatein(silica leaching) like enzyme is released by the bacterium, which plays the vital role in thedevelopment of the bioconcrete material. This enzyme is thermostable and remained active a!very high pH (pH 12.0). This can change the distributions as well as the mechanical propertiesof the components of cement paste within the matrices. Elaborate researches on this bacteriummay help to find out the practical self-healing material in concrete near future.
B.Chattopadhyay M.Biswas S.Gbosb S.Mandal
Department of Physics,Jadavpur University,Koikata,India Department of Civil Engineering,Jadavpur University,Kolkata,India
国际会议
南京
英文
805-814
2008-10-13（万方平台首次上网日期，不代表论文的发表时间）