Retrofitting Of RC Square Column By Concrete Jacket Concoct By Replacing Coarse Aggregate With Broken Glass.

Abstract

This thesis investigates some techniques of strengthening existing square reinforced concrete column under axial loading.12 columns were casted with Four groups (Three columns each) of reinforced concrete square columns made from normal strength concrete (M20) and kept for curing for 28 days. Columns of first group were reference columns which were tested under axial loading after 28 days and then retrofitted with classic reinforced concrete jacket and again tested after 28 days. Columns of second group were tested under axial loading after 28 days and then retrofitted with reinforced concrete jacket with replacement of 10% coarse aggregate with broken glass and again tested after 28 days. Columns of third group were tested under axial loading after 28 days and then retrofitted with reinforced concrete jacket with replacement of 20% of coarse aggregate with broken glass and again tested after 28 days. Columns of fourth group were tested under axial loading after 28 days and retrofitted with reinforced concrete jacket with replacement of 30% of coarse aggregate with broken glass and again tested after 28 days. Result of all this test were analysed and compared with each other and the conclusion were drawn.