绿色低温激活和固化高强度地质聚合物粘合剂
Yanan Hu1, Yong Yao1,2, Lingling Zhang1
1School of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang 621010, China.
Materials (Basel, Switzerland)
|August 28, 2025
概括
这项研究使用低温热激活来增强地质聚合物结合物的二基尾部 (DT). 这一过程提高了反应性和性,使可持续的建筑材料发展成为可能.
科学领域:
- 材料科学
- 地质化学
- 土木工程
背景情况:
- 基尾矿 (DT) 是高度的工业副产品,由于反应性低和性差,在地质聚合物粘合剂中使用有限.
- 开发像DT这样的采矿废物应用对于可持续的资源管理和减少环境影响至关重要.
研究的目的:
- 增强地质聚合物粘合剂应用中的二基尾矿的反应性和性.
- 为利用富含酸盐的采矿废物开发一种绿色和节能的方法.
- 研究经过处理的基残留物所产生的地质聚合物的微结构演化和机械特性.
主要方法:
- 一种双调节策略,涉及逐步低温热激活 (100, 200, 300 °C) 隔基尾矿.
- 地质聚合物粘合剂形成的标准固化条件 (20 ± 2 °C, 95% RH).
- 使用X射线衍射 (XRD),富里埃变换红外光谱 (FTIR) 和扫描电子显微镜 (SEM) 的表征.
- 机械测试包括压力和曲强度测量.
主要成果:
- 热激活显著地分解了二氧化,氧化和奥利文,增加了反应性Si和Al物种的释放.
- 形成了一个紧的N-A-S-H/C-A-S-H凝结构,表明增强的地质聚合.
- 优化的地质聚合物配方达到7天的压力强度为42.3±1.8MPa,曲强度为12.76±1.6MPa.
- 曲强度与压力强度的比率达到了0.308,这表明性有所提高.
结论:
- 开发的双调节策略有效地提高了地质聚合物结合剂中的二基尾矿的性能.
- 这种方法为高价值的富含酸盐的采矿废物提供了可持续和节能的途径.
- 由此产生的地质聚合物粘合剂具有卓越的机械性能,有助于开发先进的可持续建筑材料.
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