Effects of Corrosion in Reinforced Concrete With Addition of Steel Fiber and Mineral Admixture

Abstract

As soon as the metal is extracted from their ores (Unstable), the reverse process begins, i.e., nature tries to convert them back into the form in which they were (Stable). This is due to attack of the gases present in the atmosphere on the surface of the metal converting it into compounds such as oxides, sulphides, carbonates, sulphates etc. the most common example of corrosion is rusting of iron. Rust is hydrated ferric oxide (Fe2O3 .XH2O). Some other examples are tarnishing of silver, developing of green coating on copper and bronze. Rusting of steel is of our main concern as its usage in civil engineering industry is very important. Specifically in reinforced concrete, despite all the information available on the topic, corrosion of steel continues to be a problem faced by many engineers and prevention of corrosion still requires considerable effort. The ageing transportation infrastructure and the high cost associated with extensive repair or replacement of many structures presents an engineering challenge. In this study extensive literature survey is carried out in which focus was mostly confined to corrosion induced by accelerated corrosion method. Following report shows a comparison among various reinforced concrete mixes after corrosion. A simple reinforced concrete specimen, reinforced concrete mixed with steel fiber specimen and reinforced concrete mixed with steel fiber and ultra-fine slag specimen were made by varying clear cover and reinforcement diameter. To corrode by using accelerated corrosion method and were compared for corrosion by degree of induced corrosion, flexural strength before and after corrosion and corrosion penetration depth.