MSWIFA和水泥公司合作处理软土壤 - - 实验性研究粘土沙和粘土土
Zong-Hui Liu1, Jia-Qi Li1, Xiao-Lei Zhang2
1Guangxi Key Laboratory of Disaster Prevention and Engineering Safety, College of Civil Engineering and Architecture, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, 530004, China.
Environmental science and pollution research international
|January 4, 2024
概括
城市固体废物焚烧飞灰 (MSWIFA) 结合水泥时有效地加强软土壤. 这项研究表明,MSWIFA改善了粘土的粘土特性,并且具有可接受的重金属液,为减少废物和稳定土壤提供了可持续的解决方案.
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:
- 城市固体废物焚烧飞灰 (MSWIFA) 提出了一个处置挑战.
- 软土壤需要有效的稳定,以发展基础设施.
- 再利用像MSWIFA这样的工业副产品可以提供可持续的解决方案.
研究的目的:
- 调查使用MSWIFA作为补充材料与普通波特兰水泥用于软土壤稳定性的可行性.
- 评估飞灰水泥稳定土壤 (FACS) 的机械性能和微观结构变化.
- 评估与FACS.重金属漏相关的环境风险.
主要方法:
- 使用不同百分比的MSWIFA (5%,10%,15%) 和水泥 (10%,15%) 与泥沙和泥土制备FACS.
- 评估不受限制的压力强度以确定机械性能.
- 重金属漏试验 (Zn,Pb) 用于评估环境风险.
- 使用扫描电子显微镜 (SEM) 的微结构分析和使用X射线衍射 (XRD) 的材料组成分析.
主要成果:
- 软土壤与MSWIFA和水泥的协同固化是可行的.
- MSWIFA对泥产生了积极的影响,增强了结构互连和孔隙填充,导致强度增加.
- MSWIFA降低了峰值强度,但在泥沙中增加了可塑性.
- 鉴定出C-S-H和乙矿是主要的水化产品.
- 从土FACS中出Zn和Pb的含量低于从砂FACS中出的含量,并且低于危险废物填埋场的限值.
结论:
- 在水泥稳定软土壤中,MSWIFA可以有效地被用作补充固化剂.
- 添加MSWIFA为软土壤处理提供了一种可行的方法,并有助于减少固体废物.
- 与重金属漏相关的环境风险在垃圾填埋处置的可接受范围内.
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