温度对红粘土胀缩特性研究  

Study on the Effect of Temperature on the Expansion and Shrinkage of Red Clay

作　　者：吕梦飞 陈开圣[1] 

机构地区：[1]贵州大学土木工程学院,贵州贵阳550025

出　　处：《贵州大学学报（自然科学版）》2017年第5期105-109,共5页Journal of Guizhou University:Natural Sciences

基　　金：国家自然科学基金项目(51368010;51668011);贵州省科技支撑计划项目(黔科合支撑[2016]2005);贵州科技厅-贵州大学联合资金项目(黔科合LH字[2014]7663);贵州大学研究生创新基金项目(研理工2017032)

摘　　要：温度对红粘土收缩、膨胀影响很大。在105℃和25℃条件下,通过大量室内试验,研究了温度对红粘土含水率、收缩和膨胀胀变形规律。结果表明,。含水率随时间关系可用多项式函数来拟合。温度越高收缩、膨胀越快。线缩率随含水率的增大而增大,随压实度的增大而增大。红粘土线缩率随时间关系可用多项式函数来拟合。膨胀率随时间关系可用对数函数来拟合。Temperature has a great influence on the shrinkage and swelling of red clay. The water content, shrinkage and swelling, deformation of red clay were studied by a large number of indoor tests at 105℃ and 25℃. The results show that at the high temperature （ 105℃） the ring knife sample drying takes 10-14 hours. It takes 39-50 hours at room temperature （25℃）. Water content can be fitted with a polynomial function over time. The higher temperature, the faster shrinkage and expansion is. The shrinkage increases with the water content and compaction degree. The shrinkage ratio of red clay can be fitted with a polynomial function over time. The expan-sion rate can be fitted with a logarithmic function over time.

关 键 词：温度 红粘土 含水率 胀缩变形 

分 类 号：TU446[建筑科学—岩土工程] TU441.34[建筑科学—土工工程]