生石灰与水泥处治过湿土路基填料性能试验研究  

Experimental Study of Performance of Over-wet Soil Subgrde Filler Treated with Quick Lime and Cement

作　　者：郭宏崇 GUO Hongchong(Qin County Transportation Administration,Changzhi,Shanxi 046400,China)

机构地区：[1]沁县交通运输局,山西长治046400

出　　处：《山西交通科技》2024年第3期6-9,共4页Shanxi Science & Technology of Transportation

摘　　要：为了改善过湿土路基填料的性能,选用生石灰、水泥作为改良剂,对生石灰、水泥改良过湿土路基填料的性能进行了对比试验研究。研究结果表明:相比于素过湿土,石灰或水泥改良过湿土的最佳含水量、无侧限抗压强度、回弹模量值均得到了显著提升,且均随石灰或水泥掺量的增加而增加;石灰改良过湿土虽然一定程度上提高了过湿土的CBR值,但仍不满足相关规范对于一级公路、高速公路路基填料的要求,水泥改良过湿土的CBR值在掺入水泥后显著提升,能够较好满足规范要求;石灰改良过湿土的最佳含水量要优于水泥改良过湿土,水泥对于过湿土CBR值、无侧限抗压强度、回弹模量的改善效果要显著优于石灰。To improve the performance of the over-wet soil subgrade filler, using quick lime and cement as the modifiers, the performance of the modified over-wet soil subgrade filler was compared and studied by experiments. The results showed that compared with plain over-wet soil, the optimum water content,unconfined compressive strength, and resilience modulus of the modified over-wet soil were improved and increased with the increase of the content of quick lime or cement. Although the CBR value of the over-wet soil treated with quick lime was improved, it still could not meet the specification requirements of subgrade fillers for class-1 highways and expressways. The CBR value of the cement-treated over-wet soil was significantly increased and met the specification requirements. The optimum water content of over-wet soil treated with quick lime was higher than that treated with cement, however, the cement-treated over-wet soil had better CBR value, unconfined compressive strength, and resilience modulus.

关 键 词：生石灰 水泥 过湿土 路基填料 

分 类 号：U416.1[交通运输工程—道路与铁道工程]