摘要
以兰州地区的黄土土样为试验材料进行试验,分析黄土压实性能的变化规律以及围压的变化对石灰改性黄土渗透规律的影响,为石灰改性黄土是否可以作为垃圾填埋场防渗衬垫的研究和应用提供参考。研究认为,石灰改性黄土的最大干密度随着石灰掺入比的增加而减小,而最优含水率随石灰掺入比的增加而增大;随着石灰掺入比例的增加,石灰改性黄土的渗透系数减小。石灰的掺入比为20%的改性黄土可满足垃圾填埋场底部防渗垫层的规范要求。
In this paper, a large number of tests on Lanzhou areas loess samples have been carried out. The influence of the change of compacting property and confining pressure on the permeability of lime modified loess is analyzed, which provides a reference for the research and application of lime modified loess as impermeable liner in landfill site. The results indicate that the maximum dry density of lime modified loess decreases with the increase of lime addition ratio, while the optimal moisture content increases with the increase of lime addition ratio, and the permeability coefficient of lime modified loess decreases with the increase of lime addition ratio. The modified loess with lime content of 20% can meet the specification requirements of impervious barrier of lines in landfill.
出处
《中国建材科技》
CAS
2021年第2期52-54,共3页
China Building Materials Science & Technology
关键词
石灰改性黄土
渗透试验
防渗衬垫层
lime modified loess
seepage test
impervious barrier of lines
