中南大学学报（自然科学版）2018，Vol.49Issue(3)：718-724,7.DOI:10.11817/j.issn.1672-7207.2018.03.027
含盐量对固化硫酸盐渍土抗压强度的影响
Effect of salt content on compressive strength of solidified sulphate saline soil
摘要
Abstract
To discuss the effect of salt content on compressive strength, the unconfined compressive strength test for sulphate saline soil solidified by lime and flyash was performed after curing 28 d. Also, limit moisture content, X-ray diffraction (XRD), Fourier transform infrared (FTIR) and physical adsorption tests were carried out to reaearch the consistency characteristics, phase characteristics, chemical composition and microstructure of the sulphate saline soil with different salt contents solidified by lime and flyash and analyze the mechanism of the effect of salt contents on compressive strength. The results indicate that the strength of solidified sulphate saline soil with different content of lime and flyash increases firstly and then decreases with the increase of salt contents within the scope of 0.3%?5.0% , and peak strength corresponds to the salt content of 1.8%. Under the condition of the same salt content, the strength of solidified soil increases firstly and then decreases with the increase of the content of lime and flyash when the salt content is lower than 2.8%, but the strength of solidified soil increases with the increase of the content of lime and flyash when the salt content is higher than 2.8%.关键词
硫酸盐渍土/固化机理/含盐量/抗压强度Key words
sulphate saline soil/solidification mechanism/salt content/compressive strength分类
建筑与水利引用本文复制引用
吕擎峰,贾梦雪,王生新,周刚,王庆栋..含盐量对固化硫酸盐渍土抗压强度的影响[J].中南大学学报（自然科学版）,2018,49(3):718-724,7.基金项目
国家自然科学基金资助项目(51469001) (Project(51469001) supported by the National Natural Science Foundation of China) （51469001）
