基于MgO的超硫化水泥与不同的工业副产品石膏:实验和分子动力学模拟
Jiang-Shan Li1, Wei Zhang2, Xiao Huang3
1State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; Hubei province Key Laboratory of contaminated sludge and soil science and Engineering, Wuhan 430071, China; IRSM-CAS/HK PolyU Joint Laboratory on Solid Waste Science, Wuhan 430071, China.
The Science of the total environment
|June 6, 2024
概括
基于MGO的超硫化水泥 (SSC) 为波特兰水泥提供了一个可持续的替代品. 使用MgO作为激活剂,并将工业副产品石膏纳入,可以提高性能,减少二氧化碳排放,并促进废物利用.
科学领域:
- 材料科学 材料科学 材料科学
- 可持续的建筑材料 可持续的建筑材料
- 绿色化学 绿色化学
背景情况:
- 普通的波特兰水泥生产对环境产生了重大影响.
- 越来越需要可持续的水泥替代品,以减少碳足迹.
- 超硫酸盐水泥 (SSC) 提供了更好的性能和更低的排放.
研究的目的:
- 研究使用氧化 (MgO) 作为性激活剂来生产基于MgO的超硫化水泥 (SSC).
- 评估SSC使用各种工业副产品石膏的性能.
- 优化SSC配方,以提高可持续性和机械性能.
主要方法:
- 基于MgO的SSC的配方与不同的工业副产品石膏 (建筑石膏,FGD石膏,石膏,石膏) 和颗粒高炉渣 (GGBFS).
- 液化特性和机械强度的分析 (不受限制的压力强度 - UCS).
- 孔隙结构的表征 (凝孔 < 20 nm) 和石膏晶体结构和pH影响的调查.
主要成果:
- 作为SSC中的性激活剂,MgO导致了有利的水合和机械强度.
- 一个优化的配方包括15%的工业副产品石膏,83%的GGBFS和2%的MGO.
- 与石和石相比,建筑和FGD石产生了优异的UCS增长.
- 石膏类型显著影响了水合,水合建筑石膏和水分子之间的相互作用能量较低,增强了硫酸盐激活.
结论:
- 基于MgO的SSC是一种可行的,可持续的替代品,需要更少的激活剂,并容纳更多的副产品石膏.
- 这种方法可以降低成本,减少二氧化碳排放,并促进固体废物利用.
- 工业副产品石膏的pH值和晶体结构是决定SSC水分和性能的关键因素.
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