绿色多重固体废弃物的设计和制备技术 水泥材料
Yexin Ge1, Xianping Liu2, Zhonghe Shui1
1State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China.
Materials (Basel, Switzerland)
|May 11, 2024
概括
这项研究优化了使用钢,粉,脱硫石膏和飞灰的多重固体废弃物水泥材料 (MSWCM). 最佳的混合增强了压力强度,耐用性,减少了水泥的使用,为经济和环境带来了好处.
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:
- 目前对水泥材料的研究往往忽视了对机械性能和耐久性进行全面的固体废物设计.
- 在了解在水泥应用中的多种固体废物的协同效应方面存在差距.
研究的目的:
- 探索使用钢渣 (SS),渣粉 (SP),脱硫石膏 (DG),飞灰 (FA) 和普通波特兰水泥 (OPC) 的多重固体废弃物水泥材料 (MSWCM) 的混合设计和性能.
- 研究这些固体废物的对微观和宏观性质的影响.
主要方法:
- 使用直角实验设计来确定最佳的混合比例.
- 描述包括压力强度测试,干燥收缩测量,离子电阻测试,X射线衍射 (XRD),热重力测量-差异热重力测量 (TG-DTG) 分析和核磁共振 (NMR) 光谱.
主要成果:
- 最佳的MSWCM混合物 (50%OPC,10%SS,20%SP,5%DG,15%FA) 实现了28天的压力强度为50.7MPa,表现优于对照组和空白组的14%和7.6%.
- 在干燥收缩 (降低高达22.9%) 和离子电阻 (增加高达22.6%) 中观察到显著改善.
- 显微镜分析显示了协同效应,导致化 (AFt) 和C-A-S-H凝的形成增加.
结论:
- 多种固体废物的协同相互作用显著提高了水泥材料的机械性能和耐用性.
- 这种优化的MSWCM配方为传统水泥提供了可持续的替代方案,通过减少水泥消耗,产生了巨大的经济和环境优势.
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