含有从废混凝土中提取的细菌的水泥复合材料的机械和自我愈合性能
Se-Jin Choi1, Jeong-Yeon Park1, Jung-Mi Kim2
1Department of Architectural Engineering, Wonkwang University, Iksan 54538, Republic of Korea.
Materials (Basel, Switzerland)
|December 31, 2025
概括
这项研究引入了Lysinibacillus fusiformis细菌,这些细菌来自废弃的混凝土,用于自愈的水泥. 这种细菌增强了混凝土的耐用性和自我修复效率,为基础设施展示了有希望的结果.
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.
- 微生物学 微生物学
背景情况:
- 混凝土结构容易发生裂,降低耐用性.
- 使用细菌和水泥材料的自我愈合技术提供了一个解决方案.
- 在矩阵内封装细菌可以在暴露于氧气和水后进行裂修复.
研究的目的:
- 调查从废混凝土中分离出来的Lysinibacillus fusiformis的潜力,以诱导基于水泥的材料中的石沉.
- 评估L. fusiformis对水泥复合材料的机械性能,耐用性和自我愈合能力的影响.
主要方法:
- 从废弃的混凝土中分离出素菌.
- 细菌溶液取代了5-20%的混水在砂配方中的混合水.
- 评估了机械性能 (压力强度),耐用性 (碳化深度) 和自我愈合效率.
主要成果:
- 在水泥基质中,L. fusiformis诱导了石沉.
- 砂流量和初始压力强度随着细菌含量增加 (5-20%).
- 20%的细菌溶液样本表现出最高的长期压力强度 (~45.6 MPa),降低碳化深度 (53%更高的阻力) 和最高的压力强度恢复 (~131%).
结论:
- 来自废混凝土的lysinibacillus fusiformis有效地提高了水泥复合材料的耐用性和自我愈合.
- 这种细菌促进石沉,提高机械强度和耐碳化性.
- L. fusiformis代表了一种有希望的基于生物的方法,用于可持续和有弹性的混凝土结构.
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