固体废物凝材料含有半干脱硫灰的水化机制
Yunyun Li1, Siqi Zhang1, Meixiang Huang1
1Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants, School of Resource and Safety Engineering, University of Science and Technology Beijing, Beijing 100083, China.
Gels (Basel, Switzerland)
|March 26, 2025
概括
这项研究表明,将脱硫灰 (DA) 与高炉渣 (BFS) 结合起来,可以产生有效的凝材料. 机械研磨显著提高了这些可持续建筑材料的压力强度.
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.
- 环境工程 环境工程
背景情况:
- 调查了脱硫灰 (DA) 的不足利用情况,这是煤炭燃烧的副产品.
- 探索在建筑材料中利用DA的潜力,以减少对环境的影响.
- 专注于DA与高炉渣 (BFS) 的协同使用,用于凝材料的制备.
研究的目的:
- 评估使用DA和BFS制造新型凝材料的可行性.
- 为了优化DA剂量,并评估机械研磨对材料性能的影响.
- 了解BFS-DA凝材料的水化机制和性能.
主要方法:
- 准备的凝材料具有不同比例的BFS和DA.
- 研究了机械研磨 (30分钟) 对BFS-DA混合物的影响.
- 测量了随时间 (3,7,28,56,90天) 的压力强度,并分析了水化产品和水化热量.
主要成果:
- 最佳的BFS:DA比率确定为60:40.
- 机械研磨显著增加了压力强度,在90天后达到63.97 MPa.
- 确定了关键的水化产品,包括,C-S-H凝,AFm,弗里德尔盐和一种基于硫酸的新型化合物.
结论:
- 可以有效地利用DA生产基于BFS的高性能凝材料.
- 开发的材料符合GB/T 28294-2024标准,为DA废物提供可持续的解决方案.
- 这种方法促进了资源利用,并减少了与DA处置相关的环境负担.
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