In many steel reinforced concrete members, bars are not avoidable during core drilling and the presence of these have a direct impact on results this test. This study aims to examine effect test recycled aggregate lightweight (LWC) cores. For purpose, one mix was made with total number 48 cores were taken from slab having dimensions 1 m width, 1.5 length 0.15m thickness. Each has 90 mm in diame...