探索垃圾填埋料复合材料混合物的地质技术和微观结构特性:一个实验性调查
1Department of Civil Engineering, National Institute of Technology Patna, Bihar, 800005, India.
Environmental science and pollution research international
|April 26, 2024
概括
这项研究开发了一种经济的土壤-本托尼特-飞灰复合物,用于垃圾填埋. 最佳的65:15:20混合物显著改善了工程性能,包括降低了液压导电性和增加了强度.
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 (MSW) 垃圾填埋场需要专门的内来防止环境污染.
- 使用工业废物,如飞灰,为废物管理和材料开发提供了可持续的解决方案.
- 当地可用的土壤和托尼特可以与飞灰相结合,以创建具有成本效益的复合材料.
研究的目的:
- 开发一种经济的复合混合物,使用当地的土壤,石和飞灰用于垃圾填埋.
- 评估各种土壤-本托尼特-飞灰混合物的地质技术和微观结构性质.
- 为了确定符合填埋设计参数的最佳混合比率.
主要方法:
- 混合不同比例的土壤,本托尼特和飞灰.
- 评估地质技术特性:液体极限 (LL),塑料极限 (PL),最佳水分含量 (OMC),最大干密度 (MDD),自由膨胀指数 (FSI) 和液压导电性 (HC).
- 使用X射线衍射 (XRD),扫描电子显微镜 (SEM) 和能量分散式X射线光谱 (EDAX) 评估微观结构变化.
- 在28天的固化期内测试不受限制的压力强度 (UCS).
主要成果:
- 最佳的复合材料混合比率被确定为65%的土壤,15%的托尼特和20%的飞灰.
- 这种组合显示了LL (48.57%) 和PL (32.33%) 和OMC (11.25%) 的显著增加,MDD (8.79%) 的下降.
- 在FSI (113%的增加) 和HC (96.04%的减少) 中观察到实质性的改善.
- 固化28天后,UCS增加了209%,这表明机械稳定性得到了增强.
结论:
- 土壤-本托尼特-飞灰复合材料,特别是65:15:20的比例,是垃圾填埋面的可行和可持续材料.
- 包括飞灰在内显著提高了土壤-岩混合物的工程特性.
- 这种方法有效地解决了工业废物处理的挑战,同时提高了垃圾填埋的性能.
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