Experimental research on engineering propertiesof expansive soil and lime stabilized soil

Experiments on the physical and mechanical properties of low and middle expansive soil and lime stabilized soil have been done systematically.According to the results,middle expansive soil should be stabilized before filled into roadbed because it will expand and soften remarkably after wetted and its CBR is lower than 3%;the intensity of low expansive soil meets the regulations if the compacting water content is about 3-4% higher than optimum moisture content.After stabilized with lime,the trend of expansion and shrink of the middle expansive soil can be restrained effectively and the intensity of the soil can be enhanced remarkably to fill into roadbed.The optimum quality lime ratio is about 5%.