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首页> 外文期刊>The Indian concrete journal >Bacterial concrete: A way to enhance the durability of concrete structures
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Bacterial concrete: A way to enhance the durability of concrete structures

机译：细菌混凝土：一种增强混凝土结构耐久性的方法

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摘要

Due to low tensile strength, cracks are common phenomena of concrete, through which transport of harmful substances causes early deterioration of the concrete structure. So, for sustainable development, it is needed to increase the durability of concrete. Self-healing approaches may be regarded as a promising solution to reduce the excessive maintenance cost of concrete structures. This paper presents the crack-healing phenomenon in concrete by the microbial activity of bacteria namely Bacillus Subtilis. The bacteria were directly incorporated in different concentrations in concrete. The results showed that by using the bacteria not only the cracks were healed; the compressive strength of concrete was also improved. The results showed a different healing behaviour depending on the exposure, demonstrating that the presence of water is essential for the healing reactions. The cracks were healed mainly due to the calcite precipitation by the bacterium, which was further confirmed by SEM, EDS and XRD analysis.
机译：由于抗张强度低，裂缝是混凝土的普遍现象，有害物质的运输会导致混凝土结构的早期劣化。因此，为了可持续发展，需要增加混凝土的耐久性。自愈方法可以被认为是减少混凝土结构过多维护成本的有前途的解决方案。本文通过枯草芽孢杆菌细菌的微生物活性来介绍混凝土中的裂缝愈合现象。细菌直接以不同浓度掺入混凝土中。结果表明，使用细菌不仅可以治愈裂缝，而且还可以修复细菌。混凝土的抗压强度也有所提高。结果表明，根据暴露情况，治愈行为不同，表明水的存在对于治愈反应至关重要。裂纹的愈合主要是由于细菌的方解石沉淀，这通过SEM，EDS和XRD分析得到了进一步证实。

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