高分子活性剂改良盐渍土力学特性及机理研究  

Improvement of Mechanical Properties of Saline Soil by Polymer Active Agent and Its Mechanism

作　　者：车文越 刘瑾[1] 郝社锋[2] 卜凡 任静华[2] CHE Wenyue;LIU Jin;HAO Shefeng;BU Fan;REN Jinghua(School of Earth Sciences and Engineering,Hohai University,Nanjing 211100,China;Ministry of Natural Resources Geological Survey of Jiangsu Province,Technology Innovation Center for Ecological Monitoring&Restoration Project on Land(Arable),Nanjing 210018,China)

机构地区：[1]河海大学地球科学与工程学院,江苏南京211100 [2]自然资源部国土(耕地)生态监测与修复工程技术创新中心江苏省地质调查研究院,江苏南京210018

出　　处：《建筑材料学报》2024年第5期446-453,共8页Journal of Building Materials

基　　金：自然资源部国土(耕地)生态监测与修复工程技术创新中心开放课题(GTST2021⁃006)。

摘　　要：基于三轴剪切试验与可溶盐含量测试,探究高分子活性剂掺量与养护时间对硫酸型盐渍土力学性能与可溶盐含量的影响,揭示土体微观特性及其改良机理.结果表明:CLI型高分子活性剂的掺入能有效提升硫酸型盐渍土的力学强度和抗变形能力,其最佳掺量为8%;活性剂与盐渍土发生置换反应,从而增强盐渍土的保水性能,有效降低盐渍土的可溶盐含量,CLI型高分子活性剂掺量越大,改良效果越好;养护时间达到7 d时,盐渍土的可溶盐含量趋于稳定.The effects of polymer active agent content and curing time on the mechanical properties and salinity changes of sulfate saline soil were investigated by triaxial shear test and soluble salt content test.The microscopic characteristics and improvement mechanism of CLI polymer active agent surfactant were also investigated.The results show that the addition of CLI polymer active agent can effectively improve the mechanical strength and anti-deformation ability of sulfate saline soil,and its optimal dosage is 8%.The pores are filled by the displacement reactions between CLI polymer active agent and the saline soil,improving the water retention performance.It can also effectively reduce the soluble salt content in the saline soil.The higher the CLI polymer active agent content,the better the improvement.The soluble salt content tends to be stable after 7 days.

关 键 词：硫酸型盐渍土 高分子活性剂 力学性能 可溶盐含量 机理分析 

分 类 号：TU411[建筑科学—岩土工程]