水泥改性膨胀土干密度与自由膨胀率试验研究

通过进行系列试验,研究不同水泥掺量、击实试验前后掺加水泥的膨胀土放置时间对水泥改性土干密度、自由膨胀率的影响。试验结果表明,随着水泥掺量的增大,水泥改性土的最大干密度逐渐减小;随着水泥改性土放置时间的增长,自由膨胀率逐渐变小并最终趋于稳定,水泥对膨胀土膨胀性的改良是一个渐进的、长时间的过程。

Experimental Study on Dry Density and Free Swelling Ratio of Cement Modified Expansive Soil

Based on the series of tests,this paper studies influence of different cement dosage and storage time of expansive soil mixed with cement before and after compaction test on the dry density and free swelling ratio of cement modified soil.The test result shows that with the increase of cement dosage,the maximum dry density of cement modified soil gradually reduces,and with the increase of storage time of cement modified soil,the free swelling ratio gradually reduces and eventually stabilizes.The improvement of cement to expansive soil is a gradual and lengthy process.