与热活性再生混凝土拆除废弃物混合的水泥的水化特性
Tamer H A Hasanin1, Sultan A Alsahli2, Hamud A Altaleb3
1Department of Chemistry, College of Science, Jouf University, P.O. Box 2014, Sakaka, Saudi Arabia. thhasanin@ju.edu.sa.
Scientific reports
|December 8, 2025
概括
热激活混凝土拆除废弃物 (CDW) 增强了其波佐兰性质. 这种可持续的方法使得CDW可以用作补充的水泥材料,提高混凝土的性能并减少浪费.
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.
- 环境科学 环境科学
背景情况:
- 建筑和拆除废弃物 (CDW) 带来了重大的环境和资源挑战.
- 将CDW回收成补充水泥材料 (SCM) 为建筑行业提供了一个可持续的解决方案.
研究的目的:
- 为了研究热激活对CDW的pozzolanic反应性的影响.
- 为了评估混合与热激活CDW的水泥糊的性能.
- 确定利用激活CDW作为SCM的最佳条件.
主要方法:
- 混凝土拆除废弃物 (CDW) 在500°C至900°C之间的温度下被热激活.
- 福利埃变换红外光谱 (FTIR) 和X射线衍射 (XRD) 分析了物理化学变化.
- 扫描电子显微镜 (SEM) 评估了用激活的CDW在水泥糊中的微结构发展.
主要成果:
- 700°C以上的热激活在CDW中产生反应性CaO和无形.
- 在500°C激活的CDW作为温和的pozzolan,增强长期的CSH形成.
- 通过20-30%激活的CDW替代,特别是从500-700°C激活后,观察到最佳的机械性能和耐久性.
结论:
- 热激活显著增强了CDW的pozzolanic潜力.
- 激活的CDW可以有效地用作可持续的补充水泥材料.
- 使用激活的CDW可以改善孔隙结构和长期性能.
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