Mechanism of concrete deterioration caused by micro organisms

微生物引起混凝土劣化的机理

• 批准号: 05805067
• 负责人: MORINAGA Tsutomu
• 金额: $ 1.28万
• 依托单位: HIROSHIMA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05805067/
• 关键词: Microorganisms; Concrete; Deterioration

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.

某地下混凝土结构遭到严重破坏，原因据信是微生物产生的代谢物。在这项研究中，几种类型的细菌在结构周围的土壤中分离和培养在有氧条件下。然后使用细菌进行砂浆模拟测试，并分析细菌产生的代谢产物的组成。结果，钙离子从浸泡在用细菌繁殖的培养基中的砂浆中溶出，并且发现有机酸和碳酸被细菌代谢。众所周知，混凝土会被厌氧细菌严重破坏，但这项研究表明，好氧细菌代谢的有机酸和碳酸也会导致混凝土腐烂。

项目成果

K.Kawai: "Concvete Diteriovation caused by aerobic bacteria" Concvete Library of JSCE. 24. 127-139 (1994)

K.Kawai：“需氧细菌引起的Concvete Diteriovation”JSCE Con​​cvete 图书馆。

S.Sanglimsuwau: "Resistance to and uptake of heavy metals in mushvooms" Jounal of Fermentation and Bioengineering. 75. 112-114 (1993)

S.Sanglimsuwau：“蘑菇中重金属的抵抗力和吸收”发酵与生物工程杂志。

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)

Kenji Kawai：“好氧细菌引起的混凝土恶化”，日本土木工程师学会会议记录，第 478V-21 号（1993 年）。

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)

N.Yoshida：“从重金属抗性菌株硫杆菌中分离和表征重金属结合蛋白”发酵和生物工程杂志。

田沢栄一: "微生物の代謝物産がコンクリートに及ぼす影響" セメント・コンクリート論文集. 47. 522-527 (1993)

Eiichi Tazawa：“微生物代谢物对混凝土的影响”《水泥与混凝土杂志》47. 522-527 (1993)。