中南大学学报（自然科学版）2017，Vol.48Issue(1)：191-202,12.DOI:10.11817/j.issn.1672-7207.2017.01.027
海水浸泡下水泥土强度衰减室内试验研究
Experimental study on strength deterioration process of cement stabilized soil with seawater immersion
摘要
Abstract
Micro cone penetration tests,X-ray diffraction (XRD) phase tests,scanning electron microscope (SEM) tests and chemical component analysis tests were conducted to simulate and study the strength degradation process and deterioration mechanism of cement stabilized soil with different cement ratios and different curing time in marine environment.The results show that the deterioration depth of cement stabilized soil increases with the increase of time and decreases with the increase of cement ratio.As for the cement stabilized soil immerses in seawater for 360 d,the peak value of C—S—H increases with the increase of depth,and it is consistent with the change trend of strength of cement stabilized soil.The porosity and their apertures increase at the depth of 0-10 mm.At the same time,the mass fraction of Ca decreases obviously.The fibrous and mesh chemical products in the sample link the soil particles together,and flocculation phenomenon appears obviously below the depth of 10 mm.The mass fractions of calcium ions,sulfate ions and carbonate ions in the cement stabilized soil have a tendency to decrease from deep to shallow.However,the mass fractions of magnesium ions,chloride ions and bicarbonate ions gradually decrease with the increase of depth.关键词
水泥土/强度衰减/海水环境/海相软土/微型贯入试验Key words
cement stabilized soil/strength deterioration/seawater environment/marine soft soil/micro cone penetration test分类
建筑与水利引用本文复制引用
闫楠,杨俊杰..海水浸泡下水泥土强度衰减室内试验研究[J].中南大学学报（自然科学版）,2017,48(1):191-202,12.基金项目
国家自然科学基金资助项目(50779062) (Project(50779062) supported by the National Natural Science Foundation of China) （50779062）
