红泥基水泥材料稳定土壤的工程性能和微观结构
Wentao Li1,2, Ke Huang1,2, Feng Chen2
1Key Laboratory of Health Intelligent Perception and Ecological Restoration of River and Lake, Ministry of Education, Hubei University of Technology, Wuhan 430068, China.
Materials (Basel, Switzerland)
|May 25, 2024
概括
红泥 (RM) 可以被用作地质工程中的土壤稳定剂,当与氧化 (MgO) 或氧化 (CaO) 相结合时. 这些基于RM的粘合剂显著提高了土壤的强度和抗融能力,提供了可持续的废物利用解决方案.
科学领域:
- 地质技术工程 地质技术工程
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
背景情况:
- 红泥 (RM) 是炼的重要工业副产品,给环境带来了挑战.
- 有效的回收和再利用RM策略对于可持续的工业实践至关重要.
- 地质技术应用为RM价值化提供了一个有前途的途径.
研究的目的:
- 调查使用红色泥土与氧化 (MgO) 或氧化 (CaO) 结合作为土壤稳定剂的可行性.
- 评估这些基于RM的结合剂对稳定土壤的物理,机械和微结构性质的影响.
- 为了确定最佳的粘合剂比率,并评估结解条件下的性能.
主要方法:
- 通过将红泥与MgO或CaO混合来制备基于RM的结合剂.
- 使用准备好的基于RM的粘合剂稳定土壤.
- 稳定土壤属性的表征,包括不受限制的压力强度 (UCS).
- 研究微观结构变化和冷解周期下的性能.
- 添加氧化 (NaOH) 来促进水化反应.
主要成果:
- RM-MgO和RM-CaO结合剂显著提高了稳定土壤的不受限制的压力强度 (UCS).
- 确定了最佳的粘合剂比率:RM:MgO = 5:5和RM:CaO = 8:2用于初始混合物的最大UCS.
- 添加NaOH进一步增强了UCS,RM-MgO的最佳比率为2:8,RM-CaO稳定土壤的最佳比率为 4:6.
- 稳定土壤对融侵蚀的抵抗性有所提高,RM-MgO与RM-CaO相比表现优越.
- 化酸和化酸被确定为关键强化剂.
结论:
- 红色泥与MgO或CaO和NaOH相结合,在地质技术应用中作为有效的粘合剂,用于土壤稳定.
- 稳定土壤表现出增强的机械性能和耐用性,特别是在融条件下.
- 这种方法为可持续管理和利用红泥废物提供了可行的解决方案.
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