Mechanical Properties and Microstructure Characteristics of Submerged Cement-Based Stabilized Marine Soft Clay Enhanced with ISS and PAM  

作　　者：ZHU Chenghao YU Peng GUO Zixian WANG Qigang LIU Hongjun 

机构地区：[1]Key Laboratory of Shandong Province for Marine Environment and Geological Engineering,Ocean University of China,Qingdao 266100,China [2]College of Environmental Science and Engineering,Ocean University of China,Qingdao 266100,China [3]Key Laboratory of Geological Safety of Coastal Urban Underground Space,Ministry of Natural Resources,Qingdao 266101,China [4]Qingdao Geotechnical Investigation and Surveying Research Institute,Qingdao Municipal Natural Resources and Planning Bureau,Qingdao 266032,China [5]Key Laboratory of Marine Environment and Ecology,Ministry of Education,Ocean University of China,Qingdao 266100,China

出　　处：《Journal of Ocean University of China》2025年第2期387-403,共17页中国海洋大学学报(英文版)

基　　金：supported by the Fundamental Research Funds for the Central Universities(Nos.202061027,202261063);the National Natural Science Foundation of China(No.41572247)。

摘　　要：The traditional cement-based stabilization cannot effectively stabilize the marine soft clay under submerged conditions.In order to solve this problem,the enhancement of cement-stabilized marine soft clay was investigated in this study by adding the ionic soil stabilizer(ISS)and polyacrylamide(PAM).For this purpose,varying contents of ISS and PAM(ISS-P)were added into cement-stabilized marine soft clay and subjected to curing under submerged conditions.Atterberg limits tests,direct shear tests,unconfined compression strength(UCS)tests,water-stability tests,scanning electron microscopy analysis,and X-ray diffraction analysis were carried out.The results show that using 1.8%ISS and 0.9%PAM as the optimal ratio,the cohesion,internal friction angle,UCS,and water-stability of the samples increased by 182.7%,15.4%,176.5%,and 368.5% compared to the cement-stabilized soft clay after 28 d.The increment in soil cohesion with increasing ISS-P content was more apparent than that in the internal friction angle.The combined action of ion exchange attraction and electrostatic adsorption altered the failure characteristics of the samples,resulting in localized micro-cracking and multiple failure paths.Increasing the content of ISS-P strengthened the skeletal structure of soil,reduced inter-particle spacing,and enhanced the water-stability.Additionally,ISS promotes the hydration of cement and compensates for the inhibitory effect of PAM on early cement hydration.ISS-P can effectively enhance the strength and stability of submerged cement-based stabilized marine soft clay.

关 键 词：ionic soil stabilizer POLYACRYLAMIDE marine soft clay mechanical property microstructure 

分 类 号：TU411[建筑科学—岩土工程]