改性珊瑚骨料混凝土中钢筋的腐蚀行为

doi:10.11896/cldb.20110005

材料导报

2022, Vol. 36

Issue (6): 20110005-7 https://doi.org/10.11896/cldb.20110005

无机非金属及其复合材料

改性珊瑚骨料混凝土中钢筋的腐蚀行为

张路^1,2, 牛荻涛^1,2, 文波^1,2, 张永利^1,2, 陈昊¹

1 西安建筑科技大学土木工程学院,西安 710055
2 西安建筑科技大学省部共建西部绿色建筑国家重点实验室,西安 710055

Corrosion Behavior of Steel Bars in Modified Coral Aggregate Concrete

ZHANG Lu^1,2, NIU Ditao^1,2, WEN Bo^1,2, ZHANG Yongli^1,2, CHEN Hao¹

1 School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
2 State Key Laboratory of Green Building in Western China, Xi'an University of Architecture and Technology, Xi'an 710055, China

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摘要本工作比较了由珊瑚骨料和不同的掺合料制成的钢筋混凝土构件在海洋环境中的耐久性。基于线性极化法和交流阻抗谱法,分析了改性珊瑚骨料混凝土中钢筋的腐蚀行为。研究结论如下:(1)采用线性极化法和交流阻抗谱法测试了改性珊瑚骨料混凝土中钢筋的动电位极化曲线、容抗弧曲线和阻抗模量曲线,定量分析了电化学参数对钢筋腐蚀的影响规律。(2)提出了掺合料珊瑚骨料混凝土耐久性能系数,用以表征钢筋在粉煤灰、硅灰和矿渣珊瑚骨料混凝土中的抗钢筋锈蚀性能提高值。10%硅灰掺量的珊瑚骨料混凝土的抗钢筋锈蚀性能提高了87.0%,20%矿渣掺量的珊瑚骨料混凝土的抗钢筋锈蚀性能提高了68.73%,20%粉煤灰掺量的珊瑚骨料混凝土的抗钢筋锈蚀性能提高了50.15%。(3)建立了掺合料用量和钢筋腐蚀电流密度的回归分析函数,并且得出掺合料对珊瑚骨料混凝土中钢筋锈蚀速率的修正系数。

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	张路
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关键词: 珊瑚骨料混凝土掺合料腐蚀行为电化学测试锈蚀速率

Abstract: The durability of reinforced concrete components made from coral aggregate and different admixtures in marine environment were compared. The corrosion behavior of reinforcement in modified coral aggregate concrete (MCAC) was analyzed by electrochemical measurement. The research conclusions are as follows: (Ⅰ) the dynamic potential polarization, capacitance-reactance and impedance modulus curves of steel bars in MCAC were tested by linear polarization and electrochemical impedance spectrum, and the influence of electrochemical parameters on steel bars corrosion was quantitatively analyzed. (Ⅱ) The durability coefficient of MCAC was proposed to represent the improved corrosion resistance value of steel bars in MCAC with FA, SF and GGBS. Compared to the MCAC without admixtures, the chloride resistance of the MCAC containing 10% SF, 20% GGBS, and 20% FA increased by 87.0%, 68.73%, and 50.15%, respectively. (Ⅲ) The regression analysis function of admixtures and corrosion rate of steel bars in MCAC was established, and the correction coefficient of admixtures to the corrosion rate of steel bars in MCAC was obtained.

Key words: coral aggregate concrete admixtures corrosion behavior electrochemical test corrosion rate

出版日期: 2022-03-25 发布日期: 2022-03-21

ZTFLH:

TU502+.5

基金资助: 国家自然科学基金重大项目支课题(51590914);国家自然科学基金项目(52078413;52078415) ;陕西省教育厅科研计划项目(18JS062)

通讯作者: niuditao@163.com

作者简介: 张路,2021年12月毕业于西安建筑科技大学, 获得工学博士学位,主要从事新型钢筋混凝土材料领域的研究。在国内外重要期刊发表文章20多篇,申报发明专利3项。
牛荻涛,西安建筑科技大学教授。1991年9月毕业于哈尔滨工业大学,获得工学博士学位。同年加入西安建筑科技大学工作至今,主要从事混凝土结构耐久性的研究。在国内外重要期刊发表文章300余篇,申报发明专利50余项。

引用本文:

张路, 牛荻涛, 文波, 张永利, 陈昊. 改性珊瑚骨料混凝土中钢筋的腐蚀行为[J]. 材料导报, 2022, 36(6): 20110005-7.
ZHANG Lu, NIU Ditao, WEN Bo, ZHANG Yongli, CHEN Hao. Corrosion Behavior of Steel Bars in Modified Coral Aggregate Concrete. Materials Reports, 2022, 36(6): 20110005-7.

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http://www.mater-rep.com/CN/10.11896/cldb.20110005 或 http://www.mater-rep.com/CN/Y2022/V36/I6/20110005

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