使用替代工业废物材料稳定红泥 - 机械和微观结构性质.
N Murali Mohan1, Venkata Ramana Gondu1, Sudheer Kumar Yamsani1
1Department of Civil Engineering, National Institute of Technology, Warangal, 504006, India.
Journal of environmental management
|July 12, 2025
概括
本研究探讨了地质技术应用中的稳定红泥 (RM),发现石灰和磨砂颗粒高炉渣 (GGBS) 组合有效地提高了路面施工的强度和耐用性.
科学领域:
- 地质技术工程 地质技术工程
- 环境工程 环境工程
- 材料科学 材料科学 材料科学
背景情况:
- 红泥 (Red Mud,简称RM) 是加工中产生的有毒工业副产品,由于储存和潜在的泄漏,会给环境带来风险.
- 稳定RM对于其作为地质技术材料的使用至关重要,特别是在路面应用中.
- 现有的方法,如水泥和地质聚合物稳定,在耐用性和环境影响 (碳足迹) 方面存在局限性.
研究的目的:
- 评估石灰,飞灰 (FA) 和GGBS单独或组合对稳定RM的强度和耐用性的影响.
- 根据印度道路大会 (IRC) 的标准,评估稳定RM对于路面施工的适用性,特别是亚基线和基线线.
主要方法:
- 研究了不同百分比的石灰,FA和GGBS稳定了RM的不受限制的压力强度 (UCS) 和耐久性.
- 对比了不同稳定混合物的性能,包括添加剂的单个和组合应用.
- 在固化7天和28天后评估UCS,并根据已确定的路面工程标准评估耐用性方面.
主要成果:
- 石灰稳定本身不符合耐久性要求,尽管它显示了适度的强度增长.
- 飞灰 (FA) 与石灰相结合,改善了UCS和耐久性,高达30%的FA,添加20%的石灰.
- 石灰-GGBS组合显示出显著的潜力,达到5.79MPa-9.83MPa之间的UCS值,并满足耐用性标准,特定混合物 (RMGGBSL 503020) 超过8MPa.
结论:
- 石灰-GGBS稳定为路面施工中使用红泥提供了一个有希望的环保替代品,满足强度和耐用性标准.
- 稳定RM,特别是-GGBS,适合根据IRC:37-2018指南进行子基础和基础课程.
- 尽管在混合更细的RM方面存在挑战,但稳定材料对于低体积道路建设是可行的.
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