Strength (Compressive) of Concrete Made by Recyclable Concrete Aggregates after Six Hour Fire by Nondestructive Testing

Abstract Quality of concrete is mainly measured by evaluating its strength. Destructive testing specimens used for the purpose. An alternative to it non-destructive testing. This research work presents cylinders made using partial replacement natural coarse aggregates with old as and exposed 6-hour fire at 1000ºC. Rebound hammer in this evaluate 240 are cast 1:2:4 mix 0.54 water cement ratio. After 28-days curing half purpose oven. Remaining 50% control specimen compare results. rebound testing, all tested compressive strength universal machine. Comparison results shows reliability effectiveness technique difference between NDT UTM maximum up 4.7%.