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DOI:
工程科学与技术:2009,41(5):59-64
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用作填埋场替代盖层的水泥黄土工程特性
(1.兰州大学 土木工程与力学学院;2.兰州大学 西部灾害与环境力学教育部重点实验室;3.中国市政工程西北设计研究院;4.兰州大学 资源环境学院)
Properties of Loess-Cement as Alternative Cover of Landfills
(1.Lanzhou University School of Civil Engineering and Mechianics;2.Key Laboratory of Mechanics on Western Disaster and Environment, Ministry of Education, Lanzhou University;3.China Northwest Municipal Engineering Design &Research Institute;4.College of Resource and Environmental Science, Lanzhou University)
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投稿时间:2008-09-04    修订日期:2008-10-26
中文摘要: 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。
中文关键词: 水泥黄土  垃圾填埋  强度  渗透性  收缩性
Abstract:The applicability of compacted loess-cement used as alternation cover at landfill sites has been proposed in this paper. Laboratory tests were conducted on compacted loess soil improved by 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 had more remarkable effect in improving the compressibility and contractility of the mixture. The hydraulic conductivity values of loess-cement could be nicely able to the mark of user requirements by increasing the thickness of loess-cement layer based on the equivalent principle for the volume of flow. So compacted loess soil by addition of 5~10% cement is feasible for alternative cover at MSW landfill sites and the new scheme of cover has very high value of application and wide prospects.
文章编号:200800352     中图分类号:    文献标志码:
基金项目:国家自然科学基金
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引用文本:
刘平,张虎元,吴军荣,冯蕾.用作填埋场替代盖层的水泥黄土工程特性[J].工程科学与技术,2009,41(5):59-64.
Liu Ping,Zhang Huyuan,Wu Junrong,Feng Lei.Properties of Loess-Cement as Alternative Cover of Landfills[J].Advanced Engineering Sciences,2009,41(5):59-64.