Evaluate the Quality of Concrete by Ultrasonic Pulse Velocity

Checking the quality and durability of natural rocks and concrete is essential to ensure the stability and strength of a structure. To do that, you need to conduct an ultrasonic pulse velocity test, a non-destructive and in-situ testing method that assesses the quality and strength of concrete or rock. In this test, the velocity of the ultrasonic pulse through a concrete structure is measured. An ultrasonic pulse velocity test is conducted by letting a pulse of ultrasonic wave pass through a known distance of material, then measuring the time it takes for the pulse to go through the structure. A higher velocity pertains to a high-quality and durable material, while slow velocities may indicate defects like voids and cracks in the concrete or less dense materials.

An ultrasonic pulse velocity test can be conducted quickly with more reliable results with the right testing equipment. Testing machines typically have a pulse generation circuit and a pulse reception circuit to receive the signals, too. The power source, oscillation circuit, and transducer are assembled to be used. After calibration, transducers are installed on opposite sides of the concrete.

Experts measure pulse velocity following the formula where pulse velocity is equal to the width of the structure over the time it takes by the pulse to go through. When interpreting results, operators of the ultrasonic pulse velocity test equipment examine the quality of concrete in terms of internal flaws, trapped air, cracks, homogeneity, strength, workmanship, compaction, durability, honeycombing, and segregation. The test is useful in evaluating the efficacy of crack repair, too. Likewise, an ultrasonic pulse velocity test may be conducted to determine the mechanical and structural properties of concrete.