自愈混凝土中的细菌活力:对非尿解性细菌物种的案例研究
Augusta Ivaškė1, Viktor Gribniak2, Ronaldas Jakubovskis2
1Department of Chemistry and Bioengineering, Faculty of Fundamental Sciences, Vilnius Gediminas Technical University (VILNIUS TECH), Saulėtekio al. 11, 10223 Vilnius, Lithuania.
Microorganisms
|October 28, 2023
概括
这项研究表明,封装细菌可以治愈混凝土裂. 细菌伪固体和细菌哈洛杜兰体在水泥材料中表现出最佳的子活力,用于自愈混凝土应用.
科学领域:
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
- 生物技术是生物技术.
背景情况:
- 混凝土的裂纹导致钢筋腐蚀和损坏,特别是在冷解周期中.
- 现有的提高混凝土可用性的方法是有限的.
- 使用封装细菌的生物自我愈合为破裂的混凝土提供了一个有希望的解决方案.
研究的目的:
- 为了研究在自我愈合的水泥复合材料中的酸盐微囊中封装的非尿溶性细菌子的生存能力.
- 评估不同种类的细菌在混凝土中的裂纹愈合效率.
主要方法:
- 在藻酸盐微囊中将三种细菌 (B. pseudofirmus,B. cohnii,B. halodurans) 固定.
- 在水泥糊和砂中加入微囊.
- 在封装和结合后评估细菌子的生存能力.
- 在直径高达0.13毫米的混凝土样本中评估裂愈合.
主要成果:
- 在封装后,Bacillus pseudofirmus显示出最高的矿化活性和良好的子活力.
- B. pseudofirmus和B. halodurans在水泥糊中保持了高可行性,而B. halodurans在砂中表现出色.
- 在14-28天内,高达0.13毫米的裂被细菌碳酸治愈.
- 在56天后,B. pseudofirmus获得了最高的愈合效率 (0.497).
- 水泥水化温度显著影响了细菌的活力.
结论:
- 封装的非尿溶性细菌,特别是B. pseudofirmus,可以有效地治愈小型混凝土裂.
- 优化微囊含量和考虑水泥水化温度对于成功的细菌自我愈合至关重要.
- 需要进一步的研究来增强营养和细菌含量,以提高愈合效率.
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