使用微结构运输和沉建模来模拟混凝土中细菌自我愈合的有限元模拟
Ajitanshu Vedrtnam1,2, Kishor Kalauni3,4, M T Palou4
1Institute of Construction and Architecture, Slovak Academy of Science, Bratislava, 84503, Slovakia. ajitanshu.m@invertis.org.
Scientific reports
|May 6, 2025
概括
这项研究模拟了基于细菌的自我愈合混凝土,模拟了愈合剂如何移动和形成矿物质. 有限元模型准确地预测了裂关闭效率,提高了结构耐用性.
科学领域:
- 土木工程 土木工程是指土木工程.
- 材料科学 材料科学 材料科学
- 生物技术是生物技术.
背景情况:
- 基于细菌的自我愈合混凝土提供自主裂修复,以提高结构耐用性.
- 目前的模型不充分解决治愈剂的运输机制和矿物沉效率.
研究的目的:
- 开发和验证一种有限元建模 (FEM) 方法来模拟细菌自我愈合的混凝土.
- 分析混凝土微观结构内愈合剂的扩散和反应动力学.
主要方法:
- 使用X射线微型计算机断层扫描 (Micro-CT) 来创建精确的混凝土裂和孔隙的FEM网格.
- 使用FEniCS.数值解决了碳酸 (CaCO3) 沉的扩散反应方程.
- 与文献数据对比验证的模型参数 (扩散系数,降水率).
主要成果:
- 模拟显示愈合剂的非线性扩散,效率取决于裂几何和细菌活动.
- 可视化 (热图,轮图) 描绘了治疗剂的分散.
- 在最佳的细菌条件下实现了预测的65.5%的裂关闭效率.
结论:
- FEM模型有效地复制了自愈混凝土的实验趋势.
- 计算框架可以在现实的场景中预测愈合性能.
- 该模型为优化细菌封装,愈合动力学和长期耐用性评估提供了基础.
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