Abstract: One of the main reasons why steel and concrete can work together is that good bond properties exist between them, but the bond properties of the reinforced concrete in service will degrade due to corrosion of reinforcement caused by entry of the aggressive agents, and the bea-ring capacity and the service life of structures will also be affected. So, it's of great significance to understand the change rule of the bond properties from the scientific perspective, which will contribute to the pre-design and service life prediction of reinforced concrete. The experiments are mainly adopted to study the bond properties between corroded steel bar and concrete, like beam test, central pull-out test and eccentric pull-out test. Through related test methods, the bond properties are researched including bond strength, bond stiffness, bond slip and distribution of bond force. The factors affecting bond properties are analyzed like stirrups, properties of the concrete, properties of the steel, crack width, the magnitude of the applied current density and the corrosion morphology. The bond-slip constitutive laws and the relationship between the corrosion level and bond strength are established based on the statistics from the experiments. As a matter of fact, the systematic study at home and abroad has been carried out on the bond behaviour of corroded reinforced concrete members without considering external loads and good results have been achieved. The results show that the bond properties are improved when corrosion level is low, but the bond strength will rapidly decrease with the increase of the corrosion level. In the practical engineering such as high-speed rail beams (stray current and high-speed rail loads) and sea-crossing bridges (environmental corrosion and vehicle loads), the reinforced concrete structures are not only threatened by the reinforcement corrosion but affected by the external loads as well. The existence of the external loads will undoubtfully have a further impact on the bond properties and accelerate the degradation of the bond strength. In fact, the bond properties between steel and concrete under the corrosion coupled with external loads like repeated loading are comparatively less researched due to too many factors and complex test operation, which need more in-depth research to promote the further development of concrete durability. This article summarizes the experimental methods of investigating the bond behaviour and introduces bond properties, constitutive laws and bond fatigue properties of the reinforced concrete in the condition of corrosion. Finally, it points out the deficiencies of the current research results, aiming at providing some valuable ideas for the further study into the bond behaviour of the corroded reinforced concrete.
孙杨,乔国富. 锈蚀钢筋与混凝土粘结性能研究综述[J]. 材料导报, 2020, 34(3): 3116-3125.
SUN Yang,QIAO Guofu. Research on the Bond Properties Between Corroded Reinforcing Steel Bar and Concrete: a Review. Materials Reports, 2020, 34(3): 3116-3125.
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2020, Vol. 34 
