基于直流阶跃法的混凝土电阻率与抗氯离子渗透性评价  

Research on relation of anti-chloride permeability and concrete resistivity based on DC-step input

作　　者：宋家茂 张勇[2] 张润[1] 郝挺宇[1] SONG Jiamao;ZHANG Yong;ZHANG Run;HAO Tingyu(Central Research Institute of Building and Construction,MCC,Beijing 100088,China;Yunnan Normal University,Kunming 650092,China)

机构地区：[1]中冶建筑研究总院有限公司,北京100088 [2]云南师范大学,云南昆明650092

出　　处：《混凝土》2020年第3期59-62,68,共5页Concrete

基　　金：国家十三五重点研发计划项目:普通结构用高抗蚀硅酸盐水泥基材料关键技术(2016YFB0303502)。

摘　　要：提出的直流阶跃法检测混凝土电阻率,直接检测标准养护的混凝土强度试件,在试验室内研究了水胶比、砂率、粉煤灰,矿粉掺量对各龄期混凝土电阻率的影响;在某搅拌站对工程使用的C30混凝土进行了电阻率、电通量法,快速氯离子扩散系数检测,结果表明提出的电阻率法与上述两种标准方法相关性高,可以快捷评价混凝土的抗氯离子渗透性。Concrete resistivity can be tested by a method titled with direct current step input(DCSI).Simply by testing the strength specimen in lab,the influence of water binder ration,sand ratio,mineral admixture content on the DCSI resistivity were studied.Then the relation between C30 commercial concrete resistivity and electric flux as well as rapid chloride permeation index was investigated.The positive results suggested that DCSI resistivity could be used to evaluate the concrete chloride permeability effectively.

关 键 词：直流阶跃法 混凝土电阻率 电通量 氯离子扩散系数 

分 类 号：TU528.01[建筑科学—建筑技术科学]