陶冶王之, 张大伟, 刘嘉荣. ICCP作用下的CFRCM束导电及力学性能研究[J]. 工程力学, 2023, 40(S): 303-306. DOI: 10.6052/j.issn.1000-4750.2022.05.S038
引用本文: 陶冶王之, 张大伟, 刘嘉荣. ICCP作用下的CFRCM束导电及力学性能研究[J]. 工程力学, 2023, 40(S): 303-306. DOI: 10.6052/j.issn.1000-4750.2022.05.S038
TAO Ye-wang-zhi, ZHANG Da-wei, LIU Jia-rong. ELECTRICAL CONDUCTIVITY AND MECHANICAL PROPERTIES OF CFRCM WITH ICCP[J]. Engineering Mechanics, 2023, 40(S): 303-306. DOI: 10.6052/j.issn.1000-4750.2022.05.S038
Citation: TAO Ye-wang-zhi, ZHANG Da-wei, LIU Jia-rong. ELECTRICAL CONDUCTIVITY AND MECHANICAL PROPERTIES OF CFRCM WITH ICCP[J]. Engineering Mechanics, 2023, 40(S): 303-306. DOI: 10.6052/j.issn.1000-4750.2022.05.S038

ICCP作用下的CFRCM束导电及力学性能研究

ELECTRICAL CONDUCTIVITY AND MECHANICAL PROPERTIES OF CFRCM WITH ICCP

  • 摘要: 碳纤维织物增强水泥基复合材料(CFRCM)因其兼具结构性能提升和外加电流阴极保护(ICCP)功能而常被应用于混凝土结构加固和钢筋的电化学保护,但ICCP作用对CFRCM导电、力学性能的影响及机理研究较少。该文通过CFRCM加速通电试验和拉伸试验发现,ICCP对CFRCM的导电性能和力学性能均存在劣化作用。随着电量密度增大,碳纤维表面出现开裂、破损、剥离、断裂现象,CFRCM电阻经历缓慢增长和快速增长两个阶段,且电量密度相同时,电阻增长幅度一致。电量密度越大,纤维断裂现象越明显,CFRCM拉伸过程极限荷载越小。

     

    Abstract: Carbon fabric reinforced cementitious matrix (CFRCM) is often used in the reinforcement of concrete structures and the electrochemical protection of steel bars because of their combination of structural performance improvement and impressed current cathodic protection (ICCP). The effect and mechanism of CFRCM performance are less studied. It is found that the electrical conductivity and mechanical properties of CFRCM are degraded by ICCP through accelerated energization test and tensile test of CFRCM. With the increase of charge density, the damaged occurrence on the surface of carbon fiber is cracking, , peeling, and fracturing. The CFRCM resistance experienced two stages of slow growth and rapid growth, and when the charge density was the same, the resistance change was the same. The larger the charge, the more obvious the fiber fracture phenomenon, and the smaller the ultimate load during the CFRCM tensile process.

     

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