含氯再生骨料混凝土中钢筋抗锈蚀性能试验研究

doi:10.11896/cldb.23110219

材料导报

2024, Vol. 38

Issue (22): 23110219-7 https://doi.org/10.11896/cldb.23110219

无机非金属及其复合材料

含氯再生骨料混凝土中钢筋抗锈蚀性能试验研究

郑建岚^1,2, 王雅思^1,2,*, 陈僖^2,3, 张旺城^2,3

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

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

ZHENG Jianlan^1,2, WANG Yasi^1,2,*, CHEN Xi^2,3, ZHANG Wangcheng^2,3

1 College of Engineering, Fujianjiangxia University, Fuzhou 350108, China
2 Coordinative Innovation Center for Environmentally Friendly and Energy Saving HPC of Fujian Province, Fuzhou 350108, China
3 College of Civil Engineering, Fuzhou University, Fuzhou 350108, China

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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SiO₂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。

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	郑建岚
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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SiO₂强化

Abstract: 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-SiO₂ 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.

Key words: recycled aggregate concrete chloride ion corrosion corrosion resistance of reinforcement mineral admixture nano-SiO₂ strengthening

出版日期: 2024-11-25 发布日期: 2024-11-22

ZTFLH:

TU528

基金资助: 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)

通讯作者: *王雅思,博士,副教授。2011年7月毕业于福州大学土木工程学院,2022年7月在福州大学结构工程专业取得博士学位。主要从事高性能混凝土和再生混凝土材料与结构的研究工作。2014036@fjjxu.edu.cn

作者简介: 郑建岚,博士,教授,国家级百千万人才工程人选,福建省杰出科技人才,福建省科技创新领军人才,享受国务院特殊津贴专家,教育部全国高等学校优秀教师。长期从事结构工程与现代混凝土材料研发和培养博士研究生、硕士研究生的工作。近年来在自密实高性能混凝土及其结构的研究与应用、高强与高性能混凝土及再生骨料混凝土体积稳定性研究与应用、建筑废弃物资源化利用等方面开展了系统深入的工作。获国家技术发明二等奖、福建省科学技术一等奖。

引用本文:

郑建岚, 王雅思, 陈僖, 张旺城. 含氯再生骨料混凝土中钢筋抗锈蚀性能试验研究[J]. 材料导报, 2024, 38(22): 23110219-7.
ZHENG Jianlan, WANG Yasi, CHEN Xi, ZHANG Wangcheng. Study on Corrosion Resistance of Reinforcement in Recycled Aggregate Concrete with Chloride Salt in Original Concrete. Materials Reports, 2024, 38(22): 23110219-7.

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http://www.mater-rep.com/CN/10.11896/cldb.23110219 或 http://www.mater-rep.com/CN/Y2024/V38/I22/23110219

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