通过酸水泥回收的粗聚合物表面增强的效率和机制
Siyao Wang1, Jingtao Hu1, Zhiyuan Sun1
1School of Transportation and Civil Engineering, Nantong University, Nantong 226019, China.
Materials (Basel, Switzerland)
|January 11, 2024
概括
酸水泥 (MPC) 的预涂层提高了回收粗聚合物 (RCA) 和回收聚合混凝土 (RAC) 的性能. 添加飞灰或渣渣可以增强粘合和耐用性,显著提高RAC.
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.
- 可持续建筑 可持续建筑
背景情况:
- 回收聚合物混凝土 (RAC) 的性能受到回收粗聚合物 (RCA) 表面质量的限制.
- 改善RCA表面特性对于提高RAC性能和耐用性至关重要.
- 现有的表面处理方法需要优化效率和可操作性.
研究的目的:
- 为了提高RCA的表面性能,使用酸水泥 (MPC) 提高RAC性能.
- 为了研究将飞灰 (FA) 或颗粒高炉渣 (GBFS) 纳入MPC的效果,以获得更好的粘合和耐用性.
- 为了评估RAC的机械强度和耐用性,RAC经过预涂装RCA的修改.
主要方法:
- RCA是用MPC预涂的,MPC被FA或GBFS部分替代.
- 评估了经过处理的RCA的粉碎值和吸水率.
- 评估了RAC的机械性能 (压力和裂纹抗拉强度) 和离子透阻力.
- 使用BSE-EDS和微硬度测试进行的微结构分析检查了接口特性.
主要成果:
- 预涂MPC显著降低了RCA粉碎值 (高达8.15%) 在吸水率变化最小的情况下.
- 在MPC中取代10%的FA或GBFS大大改善了糊的综合性质.
- 经过修改的RAC显示压力强度 (31.58%),分裂拉伸强度 (49.75%) 和离子透阻力 (43.11%) 的最大改进.
- 微分析证实了MPC糊和RCA/新砂之间的良好的粘合,并增强了界面过渡区.
结论:
- MPC,特别是FA或GBFS添加剂,是用于RCA表面处理的高效低碳材料.
- 这种方法显著提高了回收聚合混凝土混凝土的机械性能和耐久性.
- 改进的界面过渡区微结构和微机械特性有助于改进RAC的整体性能提升.
- 基于MPC的表面处理为回收聚合混凝土混凝土的实际应用提供了一个有前途的解决方案.
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