硫酸盐环境下水泥砂浆的腐蚀产物及孔结构研究  

Research on corrosion products and pore structure of cement mortar undersulfate environment

作　　者：王学兵 郭声波 潘志华[2] WANG Xuebing;GUO Shengbo;PAN Zhihua(School of Civil Engineering and Architecture,Hubei university of Arts and Science,Xiangyang 441053,China;Collage of Material Science and Engineering,Nanjing Tech University,Nanjing 210009,China)

机构地区：[1]湖北文理学院土木工程与建筑学院,湖北襄阳441053 [2]南京工业大学材料科学与工程学院,江苏南京210009

出　　处：《混凝土与水泥制品》2024年第2期28-30,40,共4页China Concrete and Cement Products

基　　金：湖北省自然科学基金项目(2022CFB323);襄阳市科技计划项目(2022ABH006372)。

摘　　要：采用激光拉曼光谱和压汞法研究了硫酸盐环境下水泥砂浆的腐蚀产物及孔结构,并引入分形维数,建立了水泥砂浆的抗折强度与平均孔径和分形维数的关系。结果表明:不同浓度的Na2SO4溶液浸泡下,砂浆表层腐蚀产物有所不同,且腐蚀产物在砂浆表层分布是不均匀的;砂浆的抗折强度与平均孔径r成反比,与分形维数d成正比,通过三种公式拟合可知,d/r2和抗折强度具有较好的相关性。The corrosion products and pore structure of cement mortar under sulfate corrosion were studied by using laser Raman spectroscopy and mercury intrusion method.Fractal dimension was introduced,and the relationship between the flexural strength of cement mortar and the average pore size and fractal dimension was established.The results show that the corrosion products on the surface of mortar are different when soaked in Na2SO4 solutions with different concentrations,and the distribution of corrosion products on the surface of mortar is uneven.The flexural strength of mortar is inversely proportional to the average pore size r and directly proportional to the fractal dimension d.By fitting three formulas,d/r2 and flexural strength has a good correlation.

关 键 词：硫酸盐腐蚀 水泥砂浆 腐蚀产物 激光拉曼分析 孔结构 

分 类 号：TU528.7[建筑科学—建筑技术科学]