废弃珀莱特粉末作为补充水泥材料的机械性能和微观表征
Jie Wang1,2, Xuesong Lu3,4, Chao He5
1School of Architectural Engineering, Huanggang Normal University, Huanggang, 438000, People's Republic of China.
Scientific reports
|September 20, 2024
概括
废矿石粉 (WPP) 对水泥材料产生影响,降低了初始可加工性,但提高了后来的强度和改善了干燥收缩. 它的pozzolanic反应性使WPP成为混凝土生产的可行添加剂.
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.
- 建筑材料 建筑材料
背景情况:
- 研究可持续建筑材料对于减少环境影响至关重要.
- 废矿石粉 (WPP) 是一种潜在的补充性水泥材料.
- 了解WPP对水泥性质的影响是其有效利用的关键.
研究的目的:
- 综合评估废粉 (WPP) 对砂和糊状物质的影响.
- 阐明WPP对水解和微观结构的影响背后的机制.
- 评估WPP在混凝土生产中再利用的可行性.
主要方法:
- 泥性能,机械强度和水吸收的特征,水泥-WPP糊和砂.
- 使用X射线衍射 (XRD) 和扫描电子显微镜 (SEM) 等技术分析水化产品和微观结构的演变.
- 在水化过程中对干燥收缩和热释放的评估.
主要成果:
- WPP降低了初始可加工性,但加速了设置时间;机械强度最初下降,但在后期阶段显著提高.
- 吸水率最初恶化,但随着长时间的固化而改善;干燥收缩率显著降低.
- WPP加速了AFt到AFm的转换,促进了C-A-S-H的形成,并优化了孔隙结构,表明了高的pozzolanic反应性.
结论:
- 废矿石粉 (WPP) 对水泥系统的长期性能产生积极影响,包括强度和耐用性.
- WPP的波佐兰反应性和优化微观结构的能力支持其作为可持续混凝土添加剂的使用.
- 在混凝土生产中重复使用WPP在技术上是可行的,为环境和性能带来了好处.
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