在软粘土处理中研究花生灰水泥基稳定剂的水化和固化效应
Yongqin Qiu1, Qichang Fan1, Kun Zhang2
1School of Civil Engineering, Sun Yat-sen University, Guangzhou 510275, China.
Materials (Basel, Switzerland)
|January 28, 2026
概括
这项研究使用花生灰 (PA) -水泥复合材料加强软粘土,增强强度和耐用性. 最佳的PA含量通过促进二次水化,提高土壤稳定性,提供可持续的废物利用.
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:
- 农业固体废物,如花生灰 (PA),存在处置挑战.
- 软泥稳定对于基础设施发展至关重要.
- 需要可持续的建筑材料来减少对环境的影响.
研究的目的:
- 研究一种新型花生灰 (PA) -水泥复合物的有效性,作为软粘土的稳定剂.
- 通过机械和微观结构分析阐明PA水泥稳定粘土的固化机制.
- 评估农业固体废物在土木工程应用中的可持续利用潜力.
主要方法:
- 机械测试:不受限制的压力强度 (UCS) 和耐用性的干湿循环.
- 补水分析:热量计用于研究早期的补水热量.
- 材料特性:X射线衍射 (XRD),热重力测量分析 (TG) 和扫描电子显微镜 (SEM).
主要成果:
- 与纯水泥相比,PA-水泥复合材料显著提高了软粘土的强度和耐用性,特别是在7天后.
- 最佳的PA含量 (5%) 在28天后改善了UCS11.03%,相比之下20%的水泥,在干湿周期后强度损失减少.
- 微结构分析显示,PA的波佐兰反应性有助于二次C-S-H凝和埃特林吉特的形成,增加矩阵密度.
结论:
- 作为部分水泥替代品的花生灰 (PA) 有效地改善了软粘土的稳定性,提高了强度和耐用性.
- 最佳的PA剂量 (5%) 能够平衡pozzolanic的好处,同时避免稀释效应,从而提高性能,降低水泥消耗.
- 这种方法为在地质工程中高价值利用农业固体废物提供了可持续的途径.
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