用作填埋场替代盖层的水泥黄土工程特性  

Properties of Loess-Cement as Alternative Cover of Landfills

作　　者：刘平[1] 张虎元[1] 冯蕾[2] 吴军荣 龙玉凤[1] 

机构地区：[1]兰州大学西部灾害与环境力学教育部重点实验室,甘肃兰州73000 [2]兰州大学资源环境学院,甘肃兰州730000 [3]中国市政工程西北设计研究院,甘肃兰州730000

出　　处：《四川大学学报（工程科学版）》2009年第5期59-64,共6页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家自然科学基金资助项目(50678075)

摘　　要：压实水泥黄土作为城市生活垃圾卫生填埋场新型替代盖层材料具有经济、易于施工等特点。掺加一定量水泥可以有效降低黄土的压缩性、收缩性以及渗透性,极大地提高黄土的力学强度。试验研究表明,随着水泥掺量的增加,水泥黄土的液限降低,塑限升高,最大干密度降低,并且最优含水率总保持比塑限大近2个百分点。黄土中掺加5%~10%水泥对改善黄土压缩性和收缩性效果显著。依据等效替代原则,通过适当增大厚度的措施,水泥黄土的渗透性完全可以控制在规范要求以内,以符合填埋场最终盖层设计要求,达到最终盖层替代的目的。The applicability of using compacted loess-cement as alternative cover at landfill sites was proposed.Laboratory tests were conducted on compacted loess soil improved by the addition of cement for compressibility,contractility and permeability.Tests results showed that the plastic limit of loess-cement increased with the increasing of the content of cement,but there was contrary regular in the liquid limit and the maximum dry density.Experiment data also indicated that adding 5%~10% cement into the loess ha...

关 键 词：水泥黄土 垃圾填埋 强度 渗透性 收缩性 

分 类 号：U416.1[交通运输工程—道路与铁道工程]