Mechanical Properties and Evolution of Microstructure of Cement Stabilized Loess

作     者：Kangze Yuan Kui Liu Guoyang Yi Bowen Yang 

作者机构：College of Geological Engineering and GeomaticsChang'an UniversityXi'anChina China Information Industry Engineering Investigation and Research InstituteXi'anChina School of Civil EngineeringChang'an UniversityXianChina 

出 版 物：《Journal of Renewable Materials》 (可再生材料杂志（英文）)

年 卷 期：2022年第10卷第12期

页      面：3611-3627页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：This study was supported by the key research and development program of Shaanxi Province in the form of grants awarded to KL(Grant No.2017ZDXM-SF-087) BWY(Grant No.2020SF-436) 

主　　题：Strength pores SEM structure formation quantitative analysis 

摘      要：Cement Stabilized Loess(CSL)sample has a long history as a method of improving building *** this paper,the main physical(specific gravity,consistency limit,optimum moisture content,and maximum dry den-sity)and mechanical properties(Unconfined Compressive Strength(UCS)and shear strength par ameters)of CSL samples with different cement content were inves tigated,and the change reasons were exp lored by mean of SEM ***,quantitative analysis sofware Image Pro Plus(IPP)6.0 was used to characterize the microstruc-tural evolution of pores in compacted loess and CSL *** the cement content increased,the specific gravity and optimum water content in the CSL samples increased and the liquid limit and maximum dry density *** plastic limit exhibits an increase followed by a decrease,with the plasticity index changing in the opposite *** UCS and shear strengths of the CSL samples increased with increa sing cement con-tent,and the USC and cement content was better ftted using the Asymptotic model under the same curing *** growth rate of the UCS and shear strength parameters were significantly reduced at cement contents above 2%.The results of Scanning Hlectron Microscopy(SEM)showed that the structure of the CSL samples was denser and had no obvious inter-aggregate ***,compared to compacted loess,produced C-S-H gel and *** analysis of compacted loess and CSL sample by IPP *** to compacted loess,the average pore diameter and average pore area of the CSL sample decreased from 12.44μm and 229.04 μm^(2) to 8.72 μm and 84.68μm^(2),a reduction of 29.9% and 63.0%,*** pore shape tends to fatten,but there is basically no efet on the pore angle ***,a systematic description of the phy-sicochemical reactions occurring during the formation of the CSL sample structure was made,and a schematic diagram of the formation of the CSL sample structure was created.