My Civil Engineering Experience

Ultrasonic Pulse Velocity Test : An  ultrasonic pulse velocity (UPV) test  is an  in-situ,   nondestructive  test to check the quality of  concrete   and natural rocks. In this test, the strength and quality of concrete or rock is assessed by measuring the velocity of an   ultrasonic pulse  passing through a concrete structure or natural rock formation. This test is conducted by passing a pulse of ultrasonic through concrete to be tested and measuring the time taken by pulse to get through the structure. Higher velocities indicate good quality and continuity of the material, while slower velocities may indicate concrete with many cracks or voids. Ultrasonic testing equipment includes a pulse generation circuit, consisting of electronic circuit for generating pulses and a transducer for transforming electronic pulse into mechanical pulse having an oscillation frequency in range of 40 kHz to 50 kHz, and a pulse reception circui...

Rebound Hammer test : Rebound Hammer test is a Non-destructive testing method of concrete which provide a convenient and rapid indication of the compressive strength of the concrete. The rebound hammer is also called as Schmidt hammer that consist of a spring controlled mass that slides on a plunger within a tubular housing. Objective of Rebound Hammer Test : To determine the compressive strength of the concrete by relating the rebound index and the compressive strength To assess the uniformity of the concrete To assess the quality of the concrete based on the standard specifications To relate one concrete element with other in terms of quality Rebound hammer test method can be used to differentiate the acceptable and questionable parts of the structure or to compare two different structures based on strength. Rebound Hammer Positions for Testing Concrete Structure : Points to Remember in Rebound Hammer Test : The concrete surface should be smooth, clean and dry. ...