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1994 Fiscal Year Final Research Report Summary

Mechanism of concrete deterioration caused by micro organisms

Research Project

Project/Area Number 05805067
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 生物・生体工学
Research InstitutionHIROSHIMA UNIVERSITY

Principal Investigator

MORINAGA Tsutomu  Hirosima Univ, Faculty of Engineering, Assistant Prof., 工学部, 助教授 (40034417)

Co-Investigator(Kenkyū-buntansha) TAZAWA Eiichi  Hirosima Univ, Faculty of Engineering, Prof., 工学部, 教授 (60155067)
MUROOKA Yoshikastu  Hirosima Univ, Faculty of Engineering, Prof., 工学部, 教授 (60029882)
Project Period (FY) 1993 – 1994
KeywordsMicroorganisms / Concrete / Deterioration
Research Abstract

A certain undergroud concrete structure had been severely damaged, and the cause was belived to have been metabolites prorduced by microorganisms. In this study, several types of bacteria in the soil around the structure were isolated and cultured under aerobic conditions. Mortar simulation tests using the bacteria were then carried out and the composition of the metabolites produced by the bacteria analyzed. As a result, calcium ion was dissolved out from mortar soaked in the culture medium bred with the bacteria, and it was found that organic acids and carbonic acid were metabolized by the bacteria. It is already known that concrete can be severely damaged by anaerobic bacteria, but this study suggests that organic acids and carbonic acid metabolized by aerobic bacteria can also cause concrete to deterirate.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 森永,力: "微生物の代謝がコンクリートの劣化に及ぼす影響" 防菌防黴誌. 21. 379-383 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 河合研至: "好気性細菌によって引き起こされるコンクリートの劣化" 土木学会論文集. No.478V-21. 125-131 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] N.Yoshida: "Isolation and characterization of a heavy Metal-Binding Protein from a heavymetal-resistance strain Thiobacillus" Journal of Fermentation and Bioengi neering. 76. 25-28 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Sanglimsuwau: "Resistance to and uptake of heavy metals in mushvooms" Jounal of Fermentation and Bioengineering. 75. 112-114 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 田沢栄一: "好気性微生物の代謝する弱酸によるコンクリート劣化" セメント・コンクリート論文集. 48. 642-647 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Kawai: "Concrete Deterioration caused by aerobic bacteria" Coucrete Library of JSCE. 24. 127-139 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Tsutomu Morinaga: "Effect of metabolites of microorganisms on concrete deterioration" J.Antibact.Antifung.Agents. 21. 379-383 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kenji Kawai: "Concrete deteriration caused by aerobic bacteria" Dobokugakkai Ronbunsyu. 478. 125-131 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Naoto Yoshida: "Isolation and characterization of a heavy metalbinding protein from a heavy metal-resistance strain Thiobacillus" J.Ferment.Bioengineer.76. 25-28 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Saryunia Sanglimsuwan: "Resistance to and uptake of heavy metals in mushrooms" J.Ferment.Bioengineer.75. 112-114 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ei-ichi Trazawa: "Concrete deterioration due to weak acid metabolized" by aerobic microorganisms JCA Proceed. Cement & Concrete. 48. 642-647 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kenji Kawai: "Concrete deterioration caused by aerobic bacteria" Concrete library of JSCE. 24. 127-139 (1994)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1996-04-15  

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