锈蚀钢筋混凝土构件角部锈胀裂缝总宽度与钢筋锈蚀率之间的关系研究
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摘要
针对锈蚀钢筋混凝土构件角部锈胀裂缝总宽度与钢筋锈蚀率之间的关系展开研究。采用半湿通电加速法,获得三个锈蚀钢筋混凝土试件,在其上测得75组锈胀裂缝宽度和锈蚀率数据,通过观测、汇总、分析得出以下结论:对于仅沿纵筋方向的锈胀裂缝,其裂缝总宽度与纵筋锈蚀率之间存在明显的线性关系,利用二者间的拟合公式进行实际锈蚀钢筋混凝土构件内部钢筋锈蚀率的预测是可行的。对于沿纵筋和箍筋方向的双向锈胀裂缝,其裂缝总宽度与纵筋锈蚀率之间不存在明显的线性关系,在实际锈蚀混凝土结构安全检测工作中应尽量避免采用此类裂缝来预测钢筋锈蚀情况。
The relationship between total width of corrosion cracks in the corner of reinforcement corrosion components and corrosion rate was studied. 75 groups of data on the width of corrosion crack and corrosion rate from three corroded reinforced concrete components obtained by semi-wet accelerated method were measured. According to the analysis on these data some conclusions are given. For these corrosion cracks along the longitudinal bars,the total width of cracks in the corner is obviously linear with the corrosion ratio of longitudinal bar and it is feasible to utilize the linear relationship to predict the corrosion of reinforcement during the inspections of existing concrete structures. For the corrosion cracks along both longitudinal bars and stirrups,there is no linearity between the total width of cracks and the corrosion ratio of longitudinal bar. So,it should be avoided that this type of cracks was used to predict the extent of corrosion reinforcement during the condition assessment of real corroded concrete structures.
The relationship between total width of corrosion cracks in the corner of reinforcement corrosion components and corrosion rate was studied. 75 groups of data on the width of corrosion crack and corrosion rate from three corroded reinforced concrete components obtained by semi-wet accelerated method were measured. According to the analysis on these data some conclusions are given. For these corrosion cracks along the longitudinal bars,the total width of cracks in the corner is obviously linear with the corrosion ratio of longitudinal bar and it is feasible to utilize the linear relationship to predict the corrosion of reinforcement during the inspections of existing concrete structures. For the corrosion cracks along both longitudinal bars and stirrups,there is no linearity between the total width of cracks and the corrosion ratio of longitudinal bar. So,it should be avoided that this type of cracks was used to predict the extent of corrosion reinforcement during the condition assessment of real corroded concrete structures.
引文
[1]施锦杰,孙伟.混凝土中钢筋锈蚀研究现状与热点问题分析[J].硅酸盐学报,2010,38(9):1753-1764.
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[6] Karthick S,Saraswathy V,Seung-J K et al. A novel in-situ corrosion monitoring electrode for reinforced concrete structures[J]. Electrochimica Acta,2018,259(1):1129-1144
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[8]万胜武,徐杰.混凝土构件锈胀裂缝宽度与锈蚀量关系的试验研究[J].铁道建筑,2016(10):128-132.
[9] Inamullah K,Raoul F,Arnaud C. Prediction of reinforcement corrosion using corrosion induced cracks width in corroded reinforced concrete beams[J]. Cement and Concrete Research,2014,56(2):84-96
[10]干伟忠,金伟良,高明赞.混凝土中钢筋加速锈蚀试验适用性研究[J].建筑结构学报,2011,32(2):41-47
[11]李海波,鄢飞,赵羽习,等.钢筋混凝土结构开裂时刻的钢筋锈胀力模型[J].浙江大学学报(工学版),2000,34(4):415-422..
[2]侯利军,刘泓,徐世烺,等.锈蚀钢筋与钢纤维混凝土的黏结性能试验研究[J].建筑结构学报,2017,38(7):146-155.
[3]金伟良.腐蚀混凝土结构学[M].北京:科学出版社,2011:2.
[4] Arellano-Pérez J H,Ramos Negróna O J,Escobar-Jiménez R F,et al. Development of a portable device for measuring the corrosion rates of metals based on electrochemical noise signals[J]. Measurement,2018,122(7):73-81
[5]杨茂,周建庭,张洪,等.混凝土内部钢筋锈蚀的磁记忆检测[J].建筑材料学报,2018,21(2):45-350.
[6] Karthick S,Saraswathy V,Seung-J K et al. A novel in-situ corrosion monitoring electrode for reinforced concrete structures[J]. Electrochimica Acta,2018,259(1):1129-1144
[7] Andrade C,Alonso C,Molina F J. Cover cracking as a function of bar corrosion:part1-experimental test[J]. Materials and Structures,1993,26(8):453-464.
[8]万胜武,徐杰.混凝土构件锈胀裂缝宽度与锈蚀量关系的试验研究[J].铁道建筑,2016(10):128-132.
[9] Inamullah K,Raoul F,Arnaud C. Prediction of reinforcement corrosion using corrosion induced cracks width in corroded reinforced concrete beams[J]. Cement and Concrete Research,2014,56(2):84-96
[10]干伟忠,金伟良,高明赞.混凝土中钢筋加速锈蚀试验适用性研究[J].建筑结构学报,2011,32(2):41-47
[11]李海波,鄢飞,赵羽习,等.钢筋混凝土结构开裂时刻的钢筋锈胀力模型[J].浙江大学学报(工学版),2000,34(4):415-422..