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冻融循环-氯盐侵蚀-荷载耦合作用下混凝土中钢筋的锈蚀行为
作者:王阵地 姚燕 王玲 
单位:中国建筑材料科学研究总院 绿色建筑材料国家重点实验室 北京 100024 
关键词:多因素耦合 钢筋锈蚀 腐蚀速率 服役寿命 
分类号:TU528
出版年,卷(期):页码:2011,39(6):130-135
DOI:
摘要:

为了研究路用混凝土中的钢筋在冻融循环-氯盐侵蚀-荷载多因素耦合作用下的锈蚀行为,利用开路电位法和动电位扫描法测定钢筋的自腐蚀电位、腐蚀电流密度和腐蚀速率。结果表明:与施加0.3应力比的相比较,施加0.4应力比的试件钢筋脱钝时间提前了50多个循环,高应力比缩短了钢筋脱钝的时间,增大了钢筋发生锈蚀的风险;极化曲线整体负移,阴极反应被抑制,在脱钝后钢筋的阳极溶解过程阻力变小,反应朝易于腐蚀的方向进行;腐蚀速率与腐蚀电流密切相关,100次冻融循环后,腐蚀电流密度和腐蚀速率分别表明钢筋将在10~15年内发生锈蚀,并在2年后,混凝土表面产生腐蚀裂纹。

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Corrosion behavior of steel bars embedded in pavement concrete subject to synergistic effect of freeze-thaw cycles, chloride salt attack and external loading was studied. The corrosion behavior of steel bars was evaluated by measuring corrosion potential, corrosion current density and corrosion rate using open circuit potential and potentiodynamic polarization techniques. Results show that depassivation time of steel bar subject to a 0.4 stress ratio is more than 50 cycles earlier than that of the steel bar with a 0.3 stress ratio. High stress ratio shortens depassivation time of the steel bar and increases risk of steel corrosion. The cathodic reaction was inhibited with negative shift of polarization curve. Dissolution resistance of the steel bars decreases and the corrosion reaction takes place toward the direction of easy-to-corrode after the depassivation of the steel bar. Corrosion rate is closely related to corrosion current density icorr. After 100 freeze-thaw cycles, the results of icorr and corrosion rate show that the steel corrosion will occur in 10-15 years and the time from corrosion initiation to corrosion cracking is about 2 years.

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基金项目:
国家“973”计划(2009CB623106)资助项目
作者简介:
博士研究生
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参考文献:

[1] 黄鹏飞, 包亦望, 姚燕. 在盐冻循环、钢锈与弯曲荷载协同作用下钢筋混凝土的损伤失效研究[J]. 工业建筑, 2005, 35(5): 63-67. HUANG Pengfei, BAO Yiwang, YAO Yan. Ind Constr (in Chinese), 2005, 35(5): 63-67. [2] SUN Wei, MU Ru, LUO Xin, et al. Effect of chloride salt, freeze-thaw cycling and externally applied load on the performance of the concrete [J]. Cem Conc Res, 2002, 32(12): 1859-1864. [3] WERNER K C, CHEN Yaoxing, OLDER Ivan. Investigations on stress corrosion of hardened cement pastes [J]. Cem Conc Res, 2000, 30(9): 1443-1451. [4] SCHNEIDER U, CHEN S W. Behavior of high-performance concrete under ammonium nitrate solution and sustained load [J]. ACI Mater J, 1999, 96(1): 47-51. [5] CASTEL A, FRAN?OIS R, ARLIGUIE G. Effect of loading on carbonation penetration in reinforced concrete elements [J]. Cem Conc Res, 1999, 29(4): 561-565. [6] 杨全兵. 混凝土盐冻破坏机理(Ⅰ)—毛细管饱水度和结冰压[J]. 建筑材料学报, 2007, 10(5): 522-527. YANG Quanbing. J Build Mater (in Chinese), 2007, 10(5): 522-527. [7] 余红发, 慕儒, 孙伟, 等. 弯曲荷载、化学腐蚀和碳化作用及其复合对混凝土抗冻性的影响[J]. 硅酸盐学报, 2005, 33(4): 492-499. YU Hongfa, MU Ru, SUN Wei, et al. J Chin Ceram Soc (in Chinese), 2005, 33(4): 492-499. [8] MARZOUK H, JIANG D. Effects of freezing and thawing on the tension properties of high-strength concrete [J]. ACI Mater J, 1994, 91(6): 577-586. [9] BIOLZI L, GUERRINI G L, ROSATI G. Frost durability of very high performance cement-based materials [J]. J Mater Civil Eng, 1999, 11(2): 167-170. [10] BORDELEAU D, PIGEON M, BANTHIA N. Comparative study of latex modified concretes and normal concretes subjected to freezing and thawing in the presence of a deicer salt solution [J]. ACI Mater J, 1992, 89(6): 547-553. [11] SABIR B B. Mechanical properties and frost resistance of silica fume concrete [J]. Cem Concr Compos, 1997, 19(4): 285-294. [12] MONTEMOR M F, SIMOES A M P, SALTA M M. Effect of fly ash on concrete reinforcement corrosion studied by EIS [J]. Corros Sci, 2000, 22(3): 175-185. [13] BASTIDAS D M, FERNANDEZ-JIMENEZ A, PALOMO A, et al. A study on the passive state stability of steel embedded in activated fly ash mortars [J]. Corros Sci, 2008, 50(4): 1058-1065. [14] JAMIL H E, SHRIRI A, BOULIF R, et al. Corrosion behavior of reinforcing steel exposed to an amino alcohol based corrosion inhibitor [J]. Cem Concr Compos, 2005, 27(6): 671-678. [15] CHOI Yoon-Seok, KIM Jung-Gu, LEE Kwang-Myong. Corrosion behavior of steel bar embedded in fly ash concrete [J]. Corros Sci, 2006, 48(7): 1733-1745. [16] GJORV O E. Durability and service life of concrete structures [C]// Proceedings of the First Fib Congress, Tokyo, 2002: 1-16. [17] 刘永辉. 电化学测试技术[M]. 北京: 北京航空学院出版社, 1987: 1-2. LIU Yonghui. Electrochemistry Testing Technique (in Chinese). Beijing: Beihang University Press, 1987: 1-2. [18] ASTM C 876-91 Standard test method for half-cell potentials of uncoated reinforcing steel in concrete [S]. ASTM, 1999, 03(02): 1-6. [19] SUZUKI Kazuo, OHNO Yoshiteru, PRAPARNTANATORN S, et al. Mechanism of steel corrosion in cracked concrete [C]// PAGE C L, TREADAWAY K W J, BAMFORTH P B. eds. Corrosion of Reinforcement in Concrete, Barking. London: Elsevier Applied Science Publishers Ltd, 1990: 19-28. [20] ANGST U, ELSENER B, LARSEN C K, et al. Critical chloride content in reinforced concrete:a review [J] Cem Conc Res, 2009, 39(12): 1122-1138. [21] AHAMD Shamsad. Reinforcement corrosion in concrete structures, its monitoring and service life prediction:a review [J]. Cem Concr Compos, 2003, 25(4/5): 459-471. [22] STERN M, GEARY A L. Electrochemical polarization: I a theoretical analysis of the sharp of polarization curves [J]. J Electrochem Soc, 1957, 104: 56-63. [23] ANDRADE C, ALONSO M C, GONZALEZ A . An initial effort to use corrosion rate measurements for estimating rebar durability corrosion rates of steel in concrete [C]// BERKE N S, CHAKER V, WHITING D, eds. Corrosion Rates of Steel in Concrete. Philadelphia, ASTM STP 1065, 1990: 29-37. [24] ANDRADE C, ALONSO C. On-site measurements of corrosion rate of reinforcements [J]. Constr Build Mater, 2001, 15(2/3): 141-145. [25] KHATRI R P, SIRIVIVATNANON V, HEELEY P. Critical polarization resistance in service life determination [J]. Cem Concr Res, 2003, 34(5): 829-837. [26] AHMAD S, BHATTACHARJEE B. Assessment of service lives of reinforced concrete structures subjected to chloride-induced rebar corrosion [J]. J Struct Eng, 1997, 23(4): 177-182. [27] BAZANT Z P. Physical model for steel corrosion in sea structures-theory [J]. J Struct Div, 1979, 105(6): 1137-1153. [28] MORINAG S. Prediction of service lives of reinforced concrete buildings based on rate of corrosion of reinforcing steel [C]// BAKER J M, NIXON P, MAJUMDAR A J, et al. eds. Durability of Building Materials and Components, UK: Cambridge University Press, 1991: 5-16. [29] LIU Youping. Modeling the time-to-corrosion cracking of the cover concrete in chloride contaminated reinforced concrete structures [D]. Virginia: Virginia Polytechnic Institute and State University, 1996: 34-35. [30] WILKINS N J M, SHARP J V. Localised corrosion of reinforcement in marine concrete [C]// PAGE C L, TREADAWAY K W J, BAMFORTH P B, eds. Corrosion of Reinforcement in Concrete Barking, London: Elsevier Applied Science Publishers Ltd, 1990: 3-18.

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