Abstract

Info

Title:: Indoor Test on Compressibility Index Changes of Lime-soil in Sulfate Environment

Author(s):: WEN Tao; YANG Han-yu; MA Xi; MI Hai-zhen; WANG Yue-li; School of Civil Engineering, Lanzhou University of Technology

Keywords:: 2∶8 lime-soil; cement lime-soil; sulfate saline-soil; compression coefficient; compression modulus

Abstract:: Through a series of consolidated compression tests of lime-soil, the effects of the curing age and salinity of lime-soil on its compressibility were investigated, and the reasonable explanation on the microstructure was given. The test results show that the engineering properties of the two kinds of limesoil are increased when the curing age is increased, which is changed obvious especially in 40 d. 2∶8 lime-soil compression coefficient increases with its increasing sulphate content, which is more obvious when sulphate content is 2%. However, Cement lime-loess compression coefficient first decreases and then increases with its increasing salinity at a limit of about 7%. The obtained results have a certain practical significance on the engineering construction detecting and quality control in sulphate saline-soil areas, and can provide references for the engineering practice of the two kinds of lime-soil treated sulfate salty foundation.