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关于洛斯层与本托尼特-HDTMA混合的不透性的实验研究

Zhang Ming^1,2,3, Hu Dongke⁴, Pan Shaoyu⁵

¹Zhengzhou University of Aeronautics, No. 15 Wenyuan West Road, Zhengdong New District, Zhengzhou, 450006, China. zhangming@zua.edu.cn.

Scientific reports

|May 30, 2023

概括

用本托尼特和六甲基三甲基氨基化物 (HDTMA) 修改的丝显示了对垃圾填埋层的提高不透性. 最佳的混合物符合严格的透性标准,提高了填埋场的安全性.

科学领域:

地质技术工程地质技术工程
环境科学环境科学
材料科学是一种材料科学.

背景情况:

来自中国黄河地区的 Compacted Loess 往往无法满足垃圾填埋的透性标准.
有效的垃圾填埋需要较低的液压导电性,以防止污染物迁移.
修改土壤特性对于开发合适且具有成本效益的内材料至关重要.

研究的目的:

为了研究本托尼特和六甲基三甲基氨基化物 (HDTMA) 对Loess的透性的影响.
为了确定最佳的本托尼特/HDTMA比率,使洛斯能够作为垃圾填埋料材料.
为了评估修改的Loess的微结构和抗裂特性.

主要方法:

进行了灵活的壁周长测试,以测量洛斯混合物的液压导电性.
扫描电子显微镜 (SEM) 和数字摄影被用来分析微观结构的变化和裂的发展.
已确定修改的Loess液压导电性和干密度之间的关系.

主要成果:

与10%以上的本托尼特混合,可以达到不到1.0 × 10-7 cm·s-1 的透度.
少量的HDTMA稍微提高了透性,但在湿干燥周期下改善了裂纹耐受性.
特定的本托尼特/HDTMA比率 (例如,10%/0%和14%/2%) 证明符合垃圾填埋道标准.

结论:

托尼特有效地填充了洛斯的孔隙,增强了不透性.
添加HDTMA可以通过减轻宏裂纹形成来提高洛斯层的耐用性.
,当适当地修改与本托尼特和HDTMA时,是垃圾填埋的可行材料.

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