用聚氨处理的红色粘土的性能评估和稳定机制
Peiling Tan1, Fuming Wang1, Chengchao Guo1
1School of Civil Engineering, Sun Yat-sen University, Zhuhai 519082, China; Guangdong Key Laboratory of Marne Civil Engineering, Guangzhou 510275, China; Guangdong Engineering Technology Research Center for Underground Space Development, Guangzhou 510275, China.
Chemosphere
|August 24, 2023
概括
一种新的绿色聚氨 (PSP) 增强了对水敏感的红色粘土,提高了其适用于城市基础设施的适用性. 这种材料增强了土壤的柔性和机械性能,为基础稳定提供了可持续的解决方案.
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
- 环境科学 环境科学
背景情况:
- 红粘土土壤很普遍,但容易在接触水时减弱.
- 红色粘土因水而退化,对城市基础设施基础构成重大挑战,导致定居点和山体滑坡.
- 传统的土壤稳定方法往往缺乏环境可持续性.
研究的目的:
- 评估绿色,高度透,水溶性聚氨 (PSP) 作为红色粘土的新型固化剂的有效性.
- 研究PSP稳定红色粘土的机械性能和故障机制.
- 建立土壤特性和PSP处理参数之间的经验关系.
主要方法:
- 声辐射测试用于分析PSP稳定红色粘土的故障模式.
- 扫描电子显微镜 (SEM) 用于微观检查稳定机制.
- 三轴压缩试验用于在不同的PSP含量,水分含量和限制压力下确定强度,刚度和性.
主要成果:
- 在3天的固化期内,PSP治疗显著提高了红色粘土的强度和刚度.
- 稳定PSP的土壤表现出延展性失败和应变硬化行为.
- 在峰值能量吸收,峰值压力率和PSP含量之间发现了正相关性;与水分含量有负相关性. 限制压力对峰值应力比率和刚度的影响最小.
结论:
- 绿色水溶性聚氨 (PSP) 是提高红色粘土机械性能和耐水性的一种有效剂.
- PSP处理增强了土壤的柔性,使其与水性土壤区分开来,并为基础工程提供了可持续的替代方案.
- 该研究为优化PSP在地质技术应用中的使用提供了经验数据.
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