通过碳化残留物和大米灰的可持续次级改进
Saba Anjum1, Abhishek Sharma2, Kennedy C Onyelowe3,4
1Civil Engineering Department, Chandigarh University, Mohali, Punjab, India.
Scientific reports
|April 24, 2025
概括
用碳化残留物 (CCR) 和大米灰 (RHA) 稳定广的黑棉土壤 (BCS),可显著减少胀并提高强度. 最佳的混合比例提高承载能力,降低路面厚度,提供具有成本效益的,可持续的地质技术解决方案.
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
- 环境工程 环境工程
背景情况:
- 扩张性土壤,如黑棉土壤 (BCS),由于膨胀和收缩,造成结构不稳定,造成了重大工程挑战.
- 工业副产品,如碳化残留物 (CCR) 和农业废物,如大米灰 (RHA),为可持续的土壤稳定提供了潜力.
研究的目的:
- 评估CCR和RHA在BCS的地质技术特性上的联合稳定潜力.
- 确定最佳的混合比例,以提高土壤性能和减少膨胀行为.
主要方法:
- 实验室测试包括差异自由膨胀 (DFS),紧缩,不受限制的压力强度 (UCS) 和加利福尼亚轴承比率 (CBR) 测试.
- 评估BCS的地质性能,其中CCR和RHA的百分比不同.
主要成果:
- 10%的CCR和15%的RHA组合显著降低了DFS指数,从73%降至14%,减轻了胀潜力.
- 最大干密度 (MDD) 从1.551g/cc增加到1.597g/cc,表明密度提高.
- UCS和CBR值大幅增加,CBR从1.98%上升到12.4%,提高了承载能力并减少了所需的路面厚度.
结论:
- 通过pozzolanic反应,CCR和RHA有效地稳定BCS,减少胀和提高强度.
- 稳定土壤为下层应用提供了可行的,经济有效的和可持续的替代方案.
- 这种方法促进了工业和农业副产品在地质工程中的利用.
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