Abstract
Corrosion is one of the major problems affecting the durability of reinforced concrete (RC) structures. This paper investigates the effect of rebar corrosion on the performance of reinforced self-consolidating concrete (SCC) members and the effectiveness of repair. A control RC member, which has no corrosion problem, was prepared to compare against corroded and repaired members. A number of reinforced concrete members having up to 50% corrosion level were constructed and tested to study the effect of corrosion on the structural performance of RC members. The beams with corrosion problem were repaired using carbon fiber reinforced polymer (CFRP) sheets and U-wraps. All of the beams constructed, which are either not repaired or repaired, in this study were tested under two static line loads until failure. The effect of corrosion and effectiveness of repairing technique were assessed by evaluating the performance in terms of load carrying capacity, deflection, and ductility. Test results revealed that as the corrosion level increases, the loss in load carrying capacity increases. Repairing using CFRP improved the performance of corroded members. For example, when 50% corrosion level was achieved, the beam lost approximately 57% of its load carrying capacity, but when it was repaired, it recovered about 42% of its load carrying capacity.
Highlights
While concrete is one of the most widely used construction materials in the world, the durability of concrete is critical as it would have great effect on the service life of civil infrastructure and building.concrete structures are vulnerable to corrosion when concrete structures are exposed to severe environment
The effect of corrosion and effectiveness of repairing technique were assessed by evaluating the performance in terms of load carrying capacity, deflection, and ductility
Carbon Fiber Reinforced Polymer (CFRP) is used in strengthening and restoration of concrete structures, it can be used to restore the capacity of concrete structures with corrosion problem
Summary
While concrete is one of the most widely used construction materials in the world, the durability of concrete is critical as it would have great effect on the service life of civil infrastructure and building.concrete structures are vulnerable to corrosion when concrete structures are exposed to severe environment. Carbon Fiber Reinforced Polymer (CFRP) is used in strengthening and restoration of concrete structures, it can be used to restore the capacity of concrete structures with corrosion problem. Corrosion is a term that refers to the deterioration of a metal through a chemical reaction It is called rust for the corrosion in iron and iron-based alloys such as steel. It is an oxidation chemical reaction between atmospheric oxygen and iron in the presence of water. The rust mixture is much less dense than metallic iron and results in an expanded volume of the rust compared to metallic iron This expansion results in flaking on the surface of the iron metal, constantly exposing unreacted iron for further chemical reaction and eventually consuming the entire piece. Surface rust with iron does not provide any protection of the underlying unreacted metal because of this flaking, unlike some other metals such as aluminum, which forms a passivated layer
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