The mechanism of concrete deterioration caused by aerobic microorganisms

Title: The mechanism of concrete deterioration caused by aerobic microorganisms
Author(s): K. Kawai, T. Morinaga, E.-I. Tasawa
Paper category : conference
Book title: First International RILEM Workshop on Microbial Impact on Building Materials
Editor(s): M. Ribas Silva
Print-ISBN: None
e-ISBN: 2351580133
Publisher: RILEM Publications SARL
Publication year: 2000
Pages: 58 - 63
Total Pages: 6
Nb references: 3
Language: English

Abstract: Biological deterioration of concrete has been reported previously. Most degradations were caused by mainly sulfur bacteria, and many studies regarding anaerobic and aerobic sulfur bacteria have been carried out. In an earlier study it was clarified that concrete deterioration was also caused by aerobic bacteria alone. In this study, effects of metabolites of microorganisms on concrete deterioration were investigated regarding aerobic bacteria and fungi. It was found that organic and carbonic acids metabolized by these microorganisms caused concrete deterioration in the same degree as that of aerobic sulfur bacteria. In this deterioration process, organic acids decomposed and dis solved out calcium salts, while carbonic acid mainly decomposed cement hydrates.

Online publication: 2000-06-30
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2351580133.009