水资源与水工程学报2024，Vol.35Issue(2)：159-166,8.DOI:10.11705/j.issn.1672-643X.2024.02.18
硫酸盐和氯盐对砂浆宏微观力学性能的影响
Macro-and micro-mechanical properties of mortar under sulfate and cloride attack
摘要
Abstract
Salt lakes and seawater contain a large amount of sulfates and chlorides,which can cause deg-radation of underwater concrete structures from the outer surface to the inner core.According to the heter-ogeneous corrosion characteristics of mortar under sulfate and chloride attack,a series of tests,including X-ray diffraction,compressive strength,splitting tensile strength and Vickers hardness tests,were con-ducted on samples exposed to different corrosion conditions to investigate the evolution of phase composi-tion and macro-and micro-mechanical properties of mortar.A Vickers hardness evaluation model was de-veloped by modifying Logistic function.The results revealed that the corrosion products of sulfate and chloride decreased under combined sulfate and chloride attack.Moreover,the distribution of Vickers hardness along depth under combined attack could be divided into three phases,namely,ascending,de-scending and stable phase.The proposed evaluation model accurately described the Vickers hardness dis-tribution of mortar in sulfate and chloride environment.Additionally,Vickers hardness was shown to be effective in analyzing the evolution of compression resistance in different corrosion depths.The research findings could provide some reference for durability evaluation and restoration of concrete structures.关键词
硫酸盐侵蚀/氯盐侵蚀/力学性能/砂浆/维氏硬度评估模型Key words
sulfate attack/chloride attack/mechanical property/mortar/Vickers hardness evaluation model分类
建筑与水利引用本文复制引用
吕国儿,尚进,黄珊珊,李沙罡..硫酸盐和氯盐对砂浆宏微观力学性能的影响[J].水资源与水工程学报,2024,35(2):159-166,8.基金项目
国家自然科学基金青年项目(51509081) （51509081）
中国电建集团华东勘测设计研究院有限公司科技立项(KY2021-XNY-02-05) （KY2021-XNY-02-05）
