影响城市混凝土结构的微菌代谢活动

尤金 ·斯, 维克 托·, 罗迪 翁·, 加琳 娜·, 奥尔 加·
俄罗斯建筑工程大学

摘要

混凝土对微生物破坏作用的抵抗力被认为是衡量其耐久性的指标，并且越来越成为一个重要问题。我们的
研究重点是从俄罗斯鞑靼斯坦喀山市前军事医院内壁表面分离的微菌对广泛用作城市房屋建筑材料的混凝土标本进
行生物降解。真菌群落由 9株青霉菌、6株曲霉、2株木霉和 1株链格孢属组成。首先，我们确定了两种主要分离物，
烟曲霉和短青霉，并根据径向生长速率、对混凝土细菌栖息地的拮抗活性和有机酸的产生来表征它们的破坏性。我
们已经证明了五个测试品牌的高强度混凝土在生物接受性方面存在差异。真菌侵袭后混凝土抗压和抗弯能力的变化
记录在趋势水平，这主要是由于在俄罗斯国家标准推荐的测试中混凝土暴露于真菌破坏剂的时间很短。最后，通过
使用扫描电子显微镜，我们主要表明真菌对混凝土的定殖包括它们渗透到混凝土的厚度和裂缝中的萌发。元素分析
表明，与未经真菌处理的样品相比，在液相中真菌生长后，钙含量降低了约 41%，而表层生长则降低了 32%。

关键词

微菌；代谢活动；混凝土

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