石膏和碳化物渣协同作用用于红泥土稳定:机械性能,环境影响和微量化机制
Lei Xi1, Taisen Deng2, Qiang Ma1
1School of Civil Engineering, Architecture and Environment, Hubei University of Technology, No.28, Nanli Road, Hong-shan District, Wuhan, Hubei Province, 430068, China; Key Laboratory of Intelligent Health Perception and Ecological Restoration of Rivers and Lakes, Ministry of Education, Hubei University of Technology, China; Hubei Key Laboratory of Environmental Geotechnology and Ecological Remediation for Lake & River, Hubei University of Technology, China.
Environmental research
|September 7, 2025
概括
这项研究表明,将石膏 (PG) 和碳化渣 (CS) 结合起来,可以有效地稳定红泥 (RM) 土壤. 这种方法提高了土壤的强度,并大大减少了重金属的漏,促进了固体废物回收利用.
科学领域:
- 地质技术工程 地质技术工程
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
背景情况:
- 工业固体废物,如石膏 (PG),碳化渣 (CS) 和红泥 (RM) 构成重大环境挑战.
- 有效利用这些废物对于可持续发展和资源管理至关重要.
- 关于使用PG和CS结合稳定RM土壤的研究有限.
研究的目的:
- 研究PG和CS对红泥土稳定性的协同作用.
- 为了评估PG-CS稳定RM土壤复合材料的机械性能和重金属浸出.
- 在RM土壤稳定中确定PG和CS的最佳剂量.
主要方法:
- 进行了压缩,未受限制的压力强度 (UCS) 和整合未排水的三轴压缩 (CU) 测试.
- 微观分析 (XRD,SEM) 用于检查稳定土壤的微观结构.
- 毒性特征漏程序 (TCLP) 进行了评估重金属漏.
主要成果:
- 最大干密度 (MDD) 随着较高的RM比率 (1:4到4:1) 增加.
- 超过8%的PG含量导致强度降低和最终的偏差应力.
- 通过PG-CS稳定,Cr,Cd和Pb的液分别减少了54.6%,32.7%和21.9%.
- 最佳的PG和CS剂量分别为8%和12%.
结论:
- 对PG和CS的协同应用有效地稳定了RM土壤,提高了机械性能.
- 形成水凝固产品 (C-S-H/C-A-S-H,Aft) 有助于土壤的密集和稳定.
- 这种方法促进了PG和CS废物大规模利用,同时减轻了环境风险.
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