微生物矿物凝网络用于提高回收混凝土的性能:一篇评论
Yuanxun Zheng1,2, Liwei Wang1,2, Hongyin Xu1,2
1School of Water Conservancy and Transportation, Zhengzhou University, Zhengzhou 450001, China.
Gels (Basel, Switzerland)
|August 28, 2025
概括
微生物诱导的矿沉 (MICP) 通过形成碳酸凝网络来增强回收混凝土,提高了5-30%的强度,并使其具有自我愈合特性. 这种环保方法解决了建筑垃圾问题.
科学领域:
- 材料科学
- 环境工程
- 微生物学
背景情况:
- 城市建筑垃圾,特别是混凝土垃圾,对环境构成重大挑战.
- 废混凝土中的回收聚合物 (RA) 提供了一个可持续的解决方案,但存在多孔性和微裂等缺陷,降低了回收混凝土 (RC) 的性能.
- 传统的RA增强方法通常是昂贵的,能源密集的或对环境有害的.
研究的目的:
- 探索微生物诱导石沉 (MICP) 的应用,以提高回收聚合物 (RA) 和回收混凝土 (RC) 的性能.
- 研究微生物形成碳酸凝的机制及其对RA缺陷的影响.
- 审查MICP的进步,以改善RC的机械性能和实现自我修复能力.
主要方法:
- 使用特定的微生物诱导碳酸 (CaCO3) 凝在RA毛孔及其表面的沉.
- 分析MICP过程中涉及的生物化学反应和微生物种类.
- 评估环境因素对MICP有效性的影响,并优化处理策略.
主要成果:
- MICP治疗显著改善了RA缺陷,从而提高了RC的机械性能,压力强度增加了5-30%.
- 形成的碳酸凝网络加强了RA并改善了RC性能.
- 在RA中嵌入矿化微生物子可以生产自愈回收混凝土.
结论:
- MICP提出了一种创新的,对环境有益的方法,以提高回收混凝土的性能,克服传统方法的局限性.
- 这项技术为改善建筑资源利用和开发可持续,自我修复的建筑材料提供了途径.
- 对于回收料的MICP技术,需要进一步的研究,以便将其转化为实用,大规模的工程应用.
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