MODELING ESTIMATION OF MICROBIAL DECOMPOSITION OF CALCIUM SILICATE HYDRATE AND CONCRETE BIODEGRADATION

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概要

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• Net microbial decomposition of calcium silicate hydrate (C-S-H) that results in the biodegradation of concrete has been analyzed theoretically on the basis of the conservation principle of Gibbs free energy in the microorganism-concrete systems. Microorganisms have been considered to be adhered to concrete surface by forming micro-colonies and bio-films. The growth and decay of microorganisms were expressed using Monod-based equation. It was predicted that the mean density of microorganisms in bio-films reached 6.7×10^<-6>g/cm^3. The bio-film thickness reached 19.5μm. The net microbial decomposition depth of C-S-H in concrete was about 7 to 10μm/year and did not exceed 40μm/year at most, provided that microorganisms of 4×10^<-9> and 4×10^<-8>g/cm^3 adhered to concrete surface.

著者

• NAKANO MASASHI

  The University of Tokyo, Graduate School of Agriculture and Life Science

• KAWAMURA KATSUYUKI

  Tokyo Institute of Technology, Division of Earth and Planetary Science

• Kawamura Katsuyuki

  Tokyo Inst. Technol. Tokyo Jpn

• Kawamura Katsuyuki

  Tokyo Institute Of Technology Division Of Earth And Planetary Science

• Nakano Masashi

  The University Of Tokyo Graduate School Of Agriculture And Life Science

関連論文

• MODELING ESTIMATION OF MICROBIAL DECOMPOSITION OF CALCIUM SILICATE HYDRATE AND CONCRETE BIODEGRADATION
• LOCAL STRUCTURAL INFORMATION FROM EXAFS ANALYSES AND ADSORPTION MODE OF STRONTIUM ON SMECTITE
• The Viscosity of Suspensions of Bentonite(Clays in Industry,Proceedings of the 13^ International Clay Conference)

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