Assessment of Reinforced Concrete Corroded Column By Non-Destructive Test

Abstract

Corrosion of rebar is one of the most important factors that affect the durability of reinforced concrete structures. Low water cement ratio, quality of concrete and adequate cover to reinforcement are the main three important factors which can prevent the problem of corrosion. However this factors are insufficient in Splash Zones. Many structures are built as per the codal provisions have suffered rebar corrosion. Effective measures are most important to increase the durability of the structures and to overcome the problem of reinforcement corrosion. This paper discuss and analyzes the NDT results reported from a detailed test program designed to examine the axial behaviour of reinforced concrete columns subjected to steel corrosion. A total of thirty six scale model circular columns were tested. The primary variables of this investigation were the cover to diameter ratio, different degrees of steel corrosion. Corrosion process was accelerated by applying a direct current to the specimens. The measurement of electrochemical parameter was carried out using Open Circuit Potential (OCP) measurement