化学改性矿对基石膏基自平地砂水化作用的影响机制
Haozhe Ma1, Meirong Zong1, Nshuti Cedrick1
1Department of Civil Engineering, Changzhou University, Changzhou 213164, China.
Materials (Basel, Switzerland)
|November 13, 2025
概括
γ-aminopropyltriethoxysilane (KH550) 功能化的纳米活性Al2O3 (KH-Al) 提高了基于石的自平地砂 (GSL) 的性能. 最佳的机械性能是在0.5%的KH-Al下实现的,增强了水合和晶体形成.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 土木工程 土木工程是指土木工程.
背景情况:
- 工业副产品石膏是建筑材料的可持续资源.
- 基于石膏的自我平衡砂 (GSL) 的性能可以通过纳米材料修改来增强.
- γ-aminopropyltriethoxysilane (KH550) 的功能化改善了纳米粒子的分散性和兼容性.
研究的目的:
- 调查KH550功能化纳米活性Al2O3 (KH-Al) 对GLS的特性的影响.
- 分析不同KH-Al剂量对GSL流动性,定时间和机械强度的影响.
- 阐明 KH-Al 影响 GSL 水解,形态和晶体结构的机制.
主要方法:
- 用不同的KH-Al剂量 (0.05%至1%) 制备GLS.
- 评估流动性,设置时间和机械性能.
- 使用X射线衍射 (XRD),水化热分析,热重力测量分析 (TG) 和扫描电子显微镜 (SEM) 的表征.
主要成果:
- 在GSL糊中,KH-Al具有很好的分散性.
- 增加KH-Al剂量会减少流动性和定时间.
- 在0.5%的KH-Al下观察到最佳的机械性能;较高的剂量导致聚合并阻碍了水合.
- KH-Al促进了 CŜH2 和 AFt 的形成,精炼了晶体,并提高了相变效率.
结论:
- KH-Al有效地提高了石膏砂的机械强度和水化动力学.
- 对于GSL来说,KH-Al的最佳剂量是0.5%.
- 这项研究为在石膏建筑材料中使用纳米材料提供了理论支持.
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