含氯再生骨料混凝土中钢筋抗锈蚀性能试验研究  

Study on Corrosion Resistance of Reinforcement in Recycled Aggregate Concrete with Chloride Salt in Original Concrete

作　　者：郑建岚[1,2] 王雅思 陈僖[2,3] 张旺城 ZHENG Jianlan;WANG Yasi;CHEN Xi;ZHANG Wangcheng(College of Engineering,Fujianjiangxia University,Fuzhou 350108,China;Coordinative Innovation Center for Environmentally Friendly and Energy Saving HPC of Fujian Province,Fuzhou 350108,China;College of Civil Engineering,Fuzhou University,Fuzhou 350108,China)

机构地区：[1]福建江夏学院工程学院,福州350108 [2]福建省环保节能型高性能混凝土协同创新中心,福州350108 [3]福州大学土木工程学院,福州350108

出　　处：《材料导报》2024年第22期171-177,共7页Materials Reports

基　　金：国家自然科学基金联合基金重点支持项目(U1605242);福建省财政厅专项(闽财指[2022]840号);福建省自然科学基金(2021J011231);福建省教育厅中青年教师教育科研项目(JAT200368)。

摘　　要：沿海地区废弃混凝土受氯离子侵蚀,为使其更好地再生利用,探究含氯再生骨料混凝土的改性方法及钢筋抗锈蚀性能,以矿物掺合料种类及掺量、再生骨料强化为变量,设计15组混凝土,对混凝土中钢筋通电加速锈蚀,并通过电化学工作站的线性极化法和电化学阻抗谱法测试其钢筋电化学指标。结果表明:含氯再生骨料混凝土中钢筋锈蚀进程快于普通不含氯再生骨料混凝土;纳米SiO_(2)溶液强化含氯再生骨料,以及在混凝土中复掺矿物掺合料均可提高含氯再生骨料混凝土钢筋抗锈蚀性能;通过强化改性的含氯再生骨料混凝土的钢筋抗锈蚀性能不低于普通再生骨料混凝土。Abandoned concrete in coastal areas were corroded by chloride ions.In order to better recycle the concrete corroded by chloride ions,and explore the corrosion properties of reinforcement in recycled aggregate concrete with chloride salt in original concrete.Here 15 groups of concrete were designed with the types and contents of mineral admixtures and aggregate strengthening as variables.After accelerated corrosion by electrification,the steel reinforcement electrochemical indexes were measured by linear polarization method and electrochemical impedance spectroscopy method of electrochemical work.The results show that the corrosion process of steel reinforcement in chlorine-containing recycled aggregate concrete is faster than that in ordinary recycled concrete.Both nano-SiO_(2)solution strengthening recycled aggregate and adding mineral admixtures can commonly improve the corrosion resistance of recycled concrete with chloride salt in original concrete.And by strengthening and modifying,the corrosion resistance of chloride containing recycled aggregate concrete can not lower than that of ordinary recycled aggregate concrete without chlorine.

关 键 词：再生骨料混凝土 氯离子侵蚀 钢筋抗锈蚀性能 矿物掺合料 纳米SiO_(2)强化 

分 类 号：TU528[建筑科学—建筑技术科学]