Measurement of Crack Depth without Damaging Concrete

Recently Conducted a Crack Inspection on Site using Ultrasonic Pulse Velocity Tester.
Although there is no fundamental relationship between pulse velocity and strength, an estimation of strength can be obtained by correlation. The method has perhaps a greater potential for comparing known sound concrete with affected concrete.
Ultrasonic pulse velocity is a means of assessing variations in the apparent strength of concrete.
By a Formula was used for measurement of crack depth and direction of crack.