尿素改性膨胀土的变形试验研究  

Strength-deformation test on modified expansive soil with urea

作　　者：高丽君[1] 丁述理[1] 杜海金[1] 孙辰光[1] 

机构地区：[1]河北工程大学资源勘测研究河北省重点实验室,邯郸056038

出　　处：《河北建筑科技学院学报》2006年第1期31-33,共3页Journal of Hebei Institute of Architectural Science & Technology

基　　金：河北省自然科学基金(D2004000463);河北省科技攻关项目(05547009D-2);邯郸市科研基金(03043)资助

摘　　要：将相同含水量、相同干密度的邯郸地区膨胀土,在不同的尿素含量、不同龄期和不同竖向压力作用下进行变形试验。研究结果表明,改性处理后膨胀土的膨胀力、膨胀率和自由膨胀率分别由原来的111.16kPa、6.02%、72%下降为19.81kPa、0.01%、7.9%。尿素对膨胀土的膨胀性有很好的抑制作用。Under the experimental condition of different urea content, different age and different vertical pressure, strength - deformation test of expansive soil, which are in same water content and the same dry density, was taken.The results shows that expansibility, rate of expansion and rate of free expansion of expansive soil chan,ged from originally 111.16Kpa, 6.02 %, 72 % to 19.81Kpa, 0.01%, 7.9 % after modified respectively. The urea can restrain expansibility of the expansive soil effectively.

关 键 词：尿素 变形试验 膨胀力 膨胀率 自由膨胀率 

分 类 号：TU443[建筑科学—岩土工程]