Microbial concrete, a wonder metabolic product that remediates the defects in building structures

TY - CHAP

T1 - Microbial concrete, a wonder metabolic product that remediates the defects in building structures

AU - Reddy, M. Sudhakara

AU - Achal, Varenyam

AU - Mukherjee, Abhijit

N1 - Publisher Copyright: © 2012 Springer Science+Business Media B.V. All rights reserved.

PY - 2012/10/1

Y1 - 2012/10/1

N2 - Microbes play key geoactive roles in the biosphere, particularly in the areas of element biotransformations, biogeochemical cycling and mineral transformations and formations. Recently, the ability of bacteria to produce minerals such as carbonates has been studied in detail with various uses in civil engineering. Natural processes, such as weathering, faults, land subsidence, earthquakes, and human activities create fractures and fissures in concrete structures, which can reduce the service life of the structures. 'Microbial Concrete' a novel metabolic byproduct of microbially induced calcite precipitation by way of urease (urea hydrolyzing enzyme) presents a promising novel biotechnology for the enhancement of durability of building materials and structures. The ubiquity and importance of microbes in inducing calcite precipitation make microbial concrete a most important metabolic product of biomineralization that can remediate and restore such structures. Urease producing bacteria when added to cement, helps in the improvement of compressive strength, reduction of permeability and reduced corrosion rate of reinforced structure. The promising results using this metabolic product encouraged different research groups world wide and in-depth studies of these different approaches have been discussed in this chapter. The methodologies to such approach have also been discussed. The present chapter suggests a potential use of the microbially induced calcite precipitation process with environmental significance as a safe consolidation tool in remediation of defects in building structures and towards enhancement in its service life.

AB - Microbes play key geoactive roles in the biosphere, particularly in the areas of element biotransformations, biogeochemical cycling and mineral transformations and formations. Recently, the ability of bacteria to produce minerals such as carbonates has been studied in detail with various uses in civil engineering. Natural processes, such as weathering, faults, land subsidence, earthquakes, and human activities create fractures and fissures in concrete structures, which can reduce the service life of the structures. 'Microbial Concrete' a novel metabolic byproduct of microbially induced calcite precipitation by way of urease (urea hydrolyzing enzyme) presents a promising novel biotechnology for the enhancement of durability of building materials and structures. The ubiquity and importance of microbes in inducing calcite precipitation make microbial concrete a most important metabolic product of biomineralization that can remediate and restore such structures. Urease producing bacteria when added to cement, helps in the improvement of compressive strength, reduction of permeability and reduced corrosion rate of reinforced structure. The promising results using this metabolic product encouraged different research groups world wide and in-depth studies of these different approaches have been discussed in this chapter. The methodologies to such approach have also been discussed. The present chapter suggests a potential use of the microbially induced calcite precipitation process with environmental significance as a safe consolidation tool in remediation of defects in building structures and towards enhancement in its service life.

KW - Bacillus sp.

KW - Building materials

KW - Compressive strength

KW - Corrosion

KW - Crack remediation

KW - Microbial calcite

KW - Permeability

KW - Sand columns

UR - http://www.scopus.com/inward/record.url?scp=84880533776&partnerID=8YFLogxK

U2 - 10.1007/978-94-007-2229-3_24

DO - 10.1007/978-94-007-2229-3_24

M3 - 章节

AN - SCOPUS:84880533776

SN - 9400722281

SN - 9789400722286

VL - 9789400722293

SP - 547

EP - 568

BT - Microorganisms in Environmental Management

PB - Springer Netherlands

ER -