石灰改性膨胀土强度的室内试验研究  

Laboratory study on strength of expansive soil improved with lime

作　　者：王明甫[1] 程钰[2] 

机构地区：[1]西北农林科技大学水利与建筑工程学院,陕西杨凌712100 [2]中国科学院武汉岩土力学研究所,湖北武汉430071

出　　处：《人民长江》2010年第6期71-73,77,共4页Yangtze River

摘　　要：研究了不同含水率、石灰掺量、干密度、龄期对改性中膨胀土承载力（CBR）值和无侧限抗压强度值的影响。结果表明：不同条件对CBR值和无侧限抗压强度值的影响基本相同；CBR值和无侧限抗压强度值随着石灰掺量、干密度、龄期的增加而增加；最佳石灰掺量为6％；最佳龄期控制在14d；现场干密度控制在最大干密度；压实含水率按高于最优含水率的2％～3％来控制。We study the influence of different water contents, lime contents, dry densities and ages to the CBR value and unconfined compressive strength value of expansive soil. According to the results ： different conditions have similar influence on the CBR value and the unconfined compressive strength value; CBR value and unconfined compressive strength value increase with increment of lime content, dry density and age; the optimal lime content is 6%, optimum age is 14d; the optimal in -site dry density is the maximum dry density; water content of compacted soil should be 2% -3% larger than optimal water content.

关 键 词：石灰改性 承载比(CBR) 无侧限抗压强度 膨胀土 

分 类 号：TU41[建筑科学—岩土工程]