An Experimental Study on Effect of Steel Corrosion on the Bond–Slip Performance of Reinforced Concrete

Abstract

This paper studied the effects of reinforcement corrosion on bond performance between rebar and concrete. Tests were carried out to evaluate the degradation of bond between reinforcing steel and concrete for different corrosion levels of reinforcing steel. A series of 20 specimens of different concrete strength with various reinforcing steel corrosion levels were designed and manufactured. Each specimen was casted as a 200-mm concrete cube, and a steel rebar was centrally embedded with two stirrups around it. The steel rebar were corroded using an electrochemical accelerated corrosion technique. The corrosion crack opening width and length were recorded after the corrosion process. Then, monolithic pull-out loading tests were carried out on the specimens. The effects of reinforcement corrosion on crack opening, maximum bond stress, and energy dissipation were discussed in detail. It was found that reinforcement corrosion has non-negligible effects on bond performance of reinforcing bar in concrete.

Effect of Cathodic Protection on Reinforced Concrete with Fly Ash Using Electrochemical Noise

“…Corrosion is the most frequent and relevant deterioration suffered by reinforced concrete structures, particularly in structures located in an aggressive marine environment [ 6 , 7 ]. Corrosion of reinforcement in the marine environment usually occurs because aggressive agents such as chloride ions are an electrochemical process [ 8 , 9 ].…”

“…Diverse research has been reported on the corrosion behavior of SCM and the structural, mechanical, chemical and structural properties [ 23 , 24 , 25 ]. The employ of SCM is an eco-friendly and cost-effective solution due to the natural properties of these materials [ 8 , 26 ]. An essential factor of SCM materials is their faster cure time in comparison with OPC.…”

Durability in Cold Area of Prefabricated Concrete Structures

“…Their lifes are less than 20 years in the harsh cold environment. [2] Although there are many advantages in prefabricated concrete structures, it is still restricted within many internal and external factors affected in the cold environment. We should use all reasonable ways to improve its durability.…”