用于土壤固化的性多工业废弃物基水泥材料的性能优化
Xiaoli Wang1, Xiancong Wang1, Pingfeng Fu1
1School of Civil and Resources Engineering, University of Science and Technology Beijing, Beijing 100083, China.
Materials (Basel, Switzerland)
|October 26, 2024
概括
使用性多工业废物 (AMIW) 的环保水泥材料增强了土壤的稳定性. 与普通波特兰水泥 (OPC) 相比,这种基于AMIW的材料提高了24%的土壤强度,提供了一个可持续的替代品.
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:
- 土壤稳定对于基础设施发展至关重要.
- 传统方法通常依赖于普通波特兰水泥 (OPC),它具有显著的碳足迹.
- 开发可持续和环保的替代品对于现代建筑是必不可少的.
研究的目的:
- 开发和优化使用性多工业废物 (AMIW) 来稳定土壤的环保水泥材料.
- 调查AMIW成分和固化参数对稳定土壤无限制压力强度 (UCS) 的影响.
- 为了比较AMIW稳定土壤与OPC稳定土壤的性能.
主要方法:
- 为了确定AMIW的最佳成分,使用了正交实验,包括钢 (SS),高炉 (BFS),碳化物 (CS),飞 (FA) 和烟气脱硫石膏 (FGDG).
- 使用响应表面方法 (RSM) 和中央复合材料设计 (CCD) 来优化固化参数,如水分含量,固化剂含量和混合研磨时间.
- 瑞特维尔德精炼,侵入孔径测量 (MIP) 和扫描电子显微镜 (SEM) 用于分析稳定土壤的水化产品和微观结构.
主要成果:
- 最佳的AMIW组合被确定为SS:CS:FGDG:BFS:FA = 15:10:15:44:16.
- 最佳的固化条件产生了最长7天的不受限制的压力强度 (7d UCS),水分为18.51%,固化剂为11.46%,混合物研磨时间为26.48分钟.
- AMIW稳定土壤的7d UCS比OPC稳定土壤高24%.
- 补水产品包括C-S-H和埃特灵石,其含量在固化时间 (7至28天) 增加.
- 微结构分析显示结构更密集,孔径更小,固化时间更长,与强度的提高相关.
结论:
- 基于AMIW的水泥材料为土壤稳定提供了一个有希望的环保解决方案.
- 优化的成分和固化显著提高了稳定土壤的机械性能.
- 与OPC相比,开发的材料表现出优越的性能,有助于可持续的建筑实践.
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