Ultrasonic Pulse Velocity (UPV) test on concrete (IS 13311 Part 1) is used to assess:
Choose the correct answer
Only waterproofing properties
Concrete quality, uniformity, and presence of cracks/voids — higher UPV = better quality
Only chloride content
Aggregate grading
Correct Answer
B. Concrete quality, uniformity, and presence of cracks/voids — higher UPV = better quality
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UPV test: measures travel time of ultrasonic pulse (50–100 kHz) through concrete. Velocity V = path length/time. Higher V → denser, less porous, better quality concrete. V > 4.5 km/s: excellent; V 3.5–4.5: good; V < 3.0: poor. Also detects voids, cracks, and delaminations. V relates to dynamic elastic modulus.
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