TO ANALYSE THE EFFECT OF CATHODIC PROTECTION ON R.C.C STRUCTURAL MEMBER

Abstract

Corrosion is one of the most stimulating troublesome phenomenon that steel structures, pipelines and R.C.C structures have to go through , which certainly leads to unsafe structures and cause economical losses which arises in order to control the losses caused by effect of corrosion mainly in areas close to sea bed & explicit Weathering leading the steel and R.C.C structures to go through adverse change in weathering thus as we are aware that sudden changes of weather causes deposition of chloride ions leading to corrosion. There are methods to safeguard structure temporarily from the effects of corrosion using some basic methods which are effective for small run only like grouting on joints to avoid contact of reinforcement with atmospheric conditions , using special adhesive paints to protect the outer surface of steel structures and using cement slurry with adhesive bonds to protect the reinforcement in R.C.C structures, but the key method to protect the structure and fight corrosion is Cathodic protection. Cathodic protection is one of the most appropriate world famous method to protect from corrosion , in this method we basically control the flow of ions which is the cause of corrosion , there are two main types of cathodic protection used worldwide one is SACP ( Sacrificial anode cathodic protection) and ICCP ( Impressed current cathodic protection) . ICCP method is more reliable as compare to the other whether it be more complicated, uneconomical but still it has more preferences due to monitoring and controlling aspects which enables for superior control. In initial part of project we have tried to show the effect of corrosion on different r.c.c structures having similarities in shape, size but with reinforcement thus we have tried to cover major types of structures by using R.C.C beams , cubes and cylinders with different reinforcement . Using resistivity meter we have tried to check & evaluate change observed in above mentioned r.c.c structures with providing different environmental conditions to few of the samples to see and measure the changes experienced in consideration to aspect of corrosion , the samples prone to adverse environmental condition are then further treated with Iccp using dc supply which enables to eradicate the effect of corrosion for time being . The different structural members are firstly provided with Iccp to fight back the effect of corrosion individually, then we using different cubes, beams and cylinders in different circuits.To measure the effect of Iccp method in big structures , we have provide the reports of different structures kept in couples with similar or different structures which elaborates the effect of cathodic protection in super structures , the results show the positive effect of cathodic protection on r.c.c structure leading to its use in all major structures.