重金属稳定方面的进展:对玻璃-波特兰水泥粘合剂中固定的比较研究
Abdelhadi Bouchikhi1, Amine El Mahdi Safhi2, Walid Maherzi3
1Laboratoire des Infrastructures Intelligentes et des Technologies de l'Environnement Connectés (LabI2TEC), Institut Supérieur du Bâtiment et des Travaux Publics, F-13009 Marseille, France.
Materials (Basel, Switzerland)
|June 27, 2024
概括
磨砂玻璃粉 (GP) 增强了 (Zn) 在水泥粘合剂中的稳定性. 与单独使用普通波特兰水泥相比,添加GP显著改善了90天的Zn固定性.
科学领域:
- 材料科学 材料科学 材料科学
- 环境工程 环境工程
- 土木工程 土木工程是指土木工程.
背景情况:
- 越来越多的人对磨砂玻璃粉 (GP) 作为补充固体材料 (SCM) 越来越感兴趣.
- 关于SCM用于稳定重金属和金属化元素的研究有限.
- 需要有效的方法来固定在水泥材料中的 (Zn).
研究的目的:
- 用GP和普通波特兰水泥 (OPC) 的粘合剂混合物研究稳定.
- 为了比较Zn在30%GP和70%OPC粘合剂 (30GP-M) 中与参考砂 (RM) 的稳定性.
- 为了分析Zn固定的微观结构机制.
主要方法:
- 用不同的GP含量 (0%和30%) 制备水泥粘合剂.
- 治疗标本在1,28和90天.
- 先进的微观结构分析以确定 Zn 稳定位点.
主要成果:
- 在30GP-M粘合剂中90天后显著提高了Zn的运动固定性 (高于RM的40%).
- 确定了Zn稳定区域:水合C3S (Zn-C3S) 的外围,GP反应部位 (Si*-O-Zn) 和C-S-H凝 (C/Zn-S-H).
- 30%的GP矩阵增强了C3S水合,并促进了GP--酸盐产物的形成.
结论:
- 粉碎玻璃粉有效地提高了在水泥粘合剂中的固定.
- GP改善了C3S的水合,并促进了Zn在微观结构中融入.
- 该研究阐明了GP对的稳定机制,为污染现场的整治提供了见解.
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