复合物稳定轻质土壤的强度测试和机制使用疏泥
Qizhi Hu1,2, Zitian Li1, Qiang Ma1,2
1School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan 430068, China.
Materials (Basel, Switzerland)
|January 25, 2025
概括
疏的污泥用飞灰,水泥和扩展聚钢 (EPS) 处理,以创建轻质土壤用于道路床. 最佳的混合比率显著降低密度和增强强度,提供可持续的建筑材料潜力.
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
- 环境工程 环境工程
背景情况:
- 疏污泥对处置来说是一个很大的挑战.
- 精明地利用疏污泥对于可持续发展至关重要.
- 现代基础设施,特别是道路床,需要轻质,高强度的材料.
研究的目的:
- 为了开发一种轻量级,高强度的道路床,从疏污泥中填充材料.
- 为了确定飞灰,水泥和扩展聚钢 (EPS) 的最佳混合比,用于污泥稳定.
- 为了研究水泥飞灰复合物稳定的微结构机制.
主要方法:
- 来自武汉市西河的泥被用飞灰,水泥和EPS颗粒处理.
- 在复合材料上进行了密度和不受限制的压力强度 (UCS) 测试.
- 使用X射线衍射 (XRD) 和扫描电子显微镜 (SEM) 与粒子 (孔) 和裂分析系统 (PCAS) 的微结构分析.
主要成果:
- 最佳混合物:80%EPS (体积比干土),7.5%水泥 (质量比干土),5%飞灰 (质量比干土).
- 优化的轻质土壤密度:1.04 g/cm3,比原始污泥减少28.27% (1.45 g/cm3).
- UCS从110kPa (原始污泥) 增加到551kPa;飞增强了C-S-H凝的形成和微观结构的改善.
结论:
- 使用飞灰,水泥和EPS的复合稳定有效地将疏污泥转化为高质量,轻量级的道路床填充物.
- 飞灰的添加促进了有益的水化反应,导致更密集的结构和减少了膨胀性石的形成.
- 这些发现为长江流域和类似地区的疏污泥利用提供了实际解决方案.
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