多固体复合废物化污水污泥的水化性能和优化
Juntao Ma1, Hao Zheng1, Hao Qiu1
1International Joint Research Lab for Eco-building Materials and Engineering of Henan, North China University of Water Resources and Electric Power Zhengzhou 450045 China majuntao@ncwu.edu.cn.
RSC advances
|July 30, 2025
概括
这项研究将污水污泥与碳化物渣和石联合化,以创建可持续的建筑材料. 优化的工艺产生了一种水泥替代品,其压力强度为普通波特兰水泥的85%,成本降低,碳排放量更低.
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:
- 污水污泥 (SS) 产量不断增加,需要在建筑材料中可持续利用.
- 全球碳中和目标推动了对普通波特兰水泥 (OPC) 环保替代品的需求.
- 热活性污泥往往表现出不够的凝固活性.
研究的目的:
- 研究污水污泥 (SS) 与富含的废物 (碳化物渣 - CS,石膏 - PG) 的联合化.
- 为了增强热处理的SS的水泥性质,用于作为部分OPC替代品.
- 优化化条件和添加剂比例,以提高材料性能和可持续性.
主要方法:
- 在800-1000°C时,SS与CS和PG的同化.
- 使用XRD,FTIR,SEM,T2NMR和TG-DSC进行烧焦材料和糊的表征.
- 评估糊的性能,包括水化产品,多孔性和压力强度.
- 响应表面方法 (RSM) 的应用用于优化.
主要成果:
- 在800°C的化过程中,SS矿物质被转化为无形的反应性相,从而增加了pozzolanic活动.
- 与CS和PG共同化促进了酸和酸凝的形成,增强了水分 (AFt,CH) 和降低了多孔性.
- 最佳条件 (882.45°C,14.78%CS,2.62%PG) 产生了一种具有85%OPC压力强度,成本降低,碳足迹较低的材料.
结论:
- 与CS和PG共同化SS显著改善了其固性质.
- 开发的材料为OPC提供了一个可持续的替代品,适用于低强度的工程应用.
- 这种方法有助于建筑行业的废物利用和碳中和目标.
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