含基石/回收混凝土聚合物的水泥稳定路基材料的性能改进和微观结构特性
Yang Wu1,2, Xiaoya Bian1,2, Jie Liu1,2
1School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430073, China.
Materials (Basel, Switzerland)
|October 14, 2023
概括
本研究探讨在路基材料中再利用石膏 (PG) 和回收混凝土聚合物 (RCA). 添加甲酸非 (SMN) 显著提高了这些可持续的路基材料的强度和耐用性.
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.
- 环境工程 环境工程
背景情况:
- 石膏 (PG) 和回收混凝土聚合物 (RCA) 是大量的工业副产品,需要可持续的再利用策略.
- 目前的路基材料通常依赖于处女资源,这给环境和经济带来了挑战.
- 从废品中开发高性能路基材料对于可持续的基础设施发展至关重要.
研究的目的:
- 研究在水泥稳定路基材料中使用经过处理的石膏 (化PG - CPG) 和RCA的可行性.
- 评估甲酸盐非 (SMN) 对CPG/RCA路基材料的增强作用.
- 评估这些新型路基材料在各种环境条件和交通负载下的性能.
主要方法:
- 洗和烧焦PG以产生CPG.
- 混合设计和制备水泥稳定型CPG和RCA标本.
- 机械测试,包括不受限制的压力强度和耐久性测试 (湿干和冷解周期).
- 使用扫描电子显微镜 (SEM) 进行微结构分析.
主要成果:
- 使用20%CPG和11%SMN的CPG/RCA路基材料实现了7天的5.34MPa的不受限制的压力强度,适用于重型交通等级.
- 在多个循环后,添加11%的SMN显著提高了CPG/RCA材料对水分和的抗性.
- SEM分析显示,SMN的添加加密了微观结构,并减少了路基材料的裂宽度.
结论:
- 通过SMN加强CPG和RCA的联合使用,为高质量的路基材料提供了可行和可持续的解决方案.
- 开发的材料表现出出色的机械性能和耐用性,满足严格的交通和环境要求.
- 这项研究为在土木工程应用中有效重复使用工业副产品提供了宝贵的指导,促进循环经济原则.
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