电阻率比检测碱矿渣混凝土收缩性能可行性探讨  

On the Relationship of Electrical Resistivity Ratio and Shrinkage of Alkali-Activated Slag Concrete(AASC)

作　　者：杨长辉[1] 朱效宏[1] 郑雨佳[1] 李青[1] 杨凯[1] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400045

出　　处：《建筑材料学报》2016年第6期1077-1081,共5页Journal of Building Materials

基　　金：国家自然科学基金资助项目(51408078);重庆市应用开发计划项目(cstc2013yykfC50004);科技部国际合作项目(2009DFR50450)

摘　　要：使用简易电阻测试法测试并计算碱矿渣混凝土不同深度的电阻率比,然后使用千分表法测试不同水胶比碱矿渣混凝土的收缩性能,并使用质量法测试同条件下碱矿渣混凝土的质量损失.建立了碱矿渣混凝土质量损失与干燥收缩之间的线性关系,探寻了碱矿渣混凝土电阻率比与质量损失之间的关系.结果表明:碱矿渣混凝土质量损失与干燥收缩之间的相关系数R2大于0.890 9,且拟合曲线的斜率与碱矿渣混凝土水胶比相关性较大;碱矿渣混凝土的电阻率比对其质量损失十分敏感,且呈正相关,因此可通过监测碱矿渣混凝土的电阻率比来评价其干燥收缩性能.Electrical resistivity ratio of alkali-activated slag concrete（AASC） at different depths was tested with a simple resistance-testing set-up. Drying shrinkage of AASC was determined by a dial gauge method. Mass loss was detected by mass method. The correlation between mass loss and drying shrinkage was established by linear regression fitting. The results show that linear correlation coefficient R2 between mass loss and drying shrinkage is greater than 0. 890 9, the slope of the fitted line is mainly impacted by water to binder ratio; the electrical resistivity ratio was super sensitive to mass loss, and a positive correlativity is found between them, therefore, the changes of drying shrinkage can be monitored by the electrical resistivity ratio in accordance to the above relationships.

关 键 词：碱矿渣混凝土 电阻率比 干燥收缩 相关性 

分 类 号：TU528.01[建筑科学—建筑技术科学]