Ultrasonic Pulse Velocity (UPV) Test in Chennai
Frequently Asked Questions
What does a UPV Test tell you that a Rebound Hammer cannot?+
A Rebound Hammer only tests the outer 30mm surface hardness. UPV sends sound waves completely through the concrete, detecting internal voids, honeycombing, and deep cracks that are invisible from the outside.
How do you detect honeycombing using UPV?+
Sound waves travel faster through solid matter. If the pulse velocity drops suddenly in a specific section of a column, it means the sound had to travel around pockets of air (honeycombing).
Can UPV test estimate the exact compressive strength?+
UPV measures concrete quality and uniformity, not direct compressive strength. However, when correlated with Core Testing and Rebound Hammer data (SONREB method), it provides a highly accurate strength estimation.
Does UPV damage the building?+
No, it is a completely Non-Destructive Test (NDT). We only use a washable acoustic gel on the surface to ensure the sensors connect properly with the concrete.
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