使用生物模拟碳酸盐沉的砂剪切行为的一个简化模型
Yu Diao1, Jitao Bai1, Changyou Sun2
1School of Civil Engineering, Tianjin University, Tianjin 300072, China.
Materials (Basel, Switzerland)
|August 26, 2023
概括
生物模拟碳酸沉 (BCP) 的L-酸 (L-Asp) 有效地增强了沙子,显著增加了剪切和残余强度,同时减少了更多喷周期的关键位移.
科学领域:
- 地质技术工程 地质技术工程
- 材料科学 材料科学 材料科学
- 生物矿物化 生物矿物化
背景情况:
- L-酸 (L-Asp) 是一种已知的生物矿物化分子.
- 在体外,L-Asp可以诱导碳酸 (CaCO3) 沉.
- 之前没有研究过L-Asp用于沙子增强的用途.
研究的目的:
- 通过仿生碳酸沉 (BCP) 来研究L-酸 (L-Asp) 用于使用沙子加强.
- 评估BCP喷雾周期对沙子剪切强度,临界位移和残余强度的影响.
- 开发一个简化的功率模型,用于BCP处理的沙子的剪切应力移位行为.
主要方法:
- 开发了一种使用L-酸 (L-Asp) 的新型仿生碳酸沉 (BCP) 技术.
- 准备的沙子样本具有不同数量的BCP喷雾周期.
- 进行了直接剪切测试,以测量剪切强度,临界位移和残余强度.
- 建立并校准了剪切应力-位移行为简化的功率模型.
主要成果:
- 生物模拟碳酸盐沉 (BCP) 显著提高了沙子的剪切强度.
- 增加的BCP喷雾周期导致了更高的剪切和残余强度.
- 临界位移随着BCP喷雾周期的增加而减少.
- 西格形和线性模型有效地描述了观察到的强度和位移的变化.
结论:
- 通过生物模拟碳酸沉 (BCP) 的L-酸 (L-Asp) 是沙子增强的可行方法.
- BCP喷雾周期的数量是影响处理砂的机械性能的一个关键因素.
- 一个简化的功率模型准确地表示了BCP处理的沙子的剪切行为,特别是在更高的处理水平.
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