基于细菌的自我愈合化混凝土的特点,用于可持续和耐用的建筑
Abeer M Eisa1, Ahmed M Tahwia1, Yehia A Osman2
1Department of Structural Engineering, Faculty of Engineering, Mansoura University, Mansoura, Egypt.
这项研究使用回收轮胎和细菌开发了自我修复的化混凝土. 这种创新材料有效地治愈了裂,提高了混凝土的耐用性,提供了可持续的建筑解决方案.
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.
- 可持续建筑 可持续建筑
背景情况:
- 开发具有较低环境影响的耐用混凝土对于可持续建筑至关重要.
- 回收废物为增强混凝土性能和促进循环经济原则提供了机会.
研究的目的:
- 研究化混凝土的自我愈合能力,并结合了特定的细菌菌株.
- 评估回收和细菌对混凝土可加工性,机械性能和微观结构的影响.
主要方法:
- 在混凝土混合物中将15%的回收作为沙子的替代品.
- 引入Sporosarcina Pasteurii (SpP) 和Rhizobium Leguminosarum (RL) 细菌用于裂的自我愈合.
- 通过沉积试验,压力和屈曲强度测试,扫描电子显微镜 (SEM) 和能量分散式X射线光谱 (EDX) 进行评估.
主要成果:
- 化混凝土的可加工性和机械强度降低 (沉,压力和曲强度降低了77%,49%,47%).
- 细菌添加 (SpP和RL) 显著减轻了这些减少,提高了压力和曲强度,分别高达98.7%和137.4%.
- 在自愈混凝土 (SHRC) 混合物中,由于碳酸沉,在80天后观察到完全的裂自我愈合.
结论:
- 用细菌自愈的化混凝土提供了一种可行的解决方案,可以提高混凝土的耐用性并最大限度地减少裂纹.
- 这种方法促进了轮胎的回收利用,有助于可持续的建筑实践.
- 细菌诱导的碳酸形成是这种复合材料中裂自愈机制的关键.
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