The dynamic modulus of elasticity of a sample of concrete is compared in ………..
Correct Answer: D. ultrasonic pulse velocity test
🔊 Dynamic Modulus of Elasticity — UPV Test
The ultrasonic pulse velocity (UPV) test sends a high-frequency sound pulse through the concrete and measures the time for it to travel a known distance. The pulse velocity depends on the elastic properties and density of the concrete. From the velocity, the dynamic modulus of elasticity can be calculated.
The dynamic modulus is always higher than the static modulus because at ultrasonic frequencies the concrete behaves more elastically (no creep, less micro-cracking).
Dynamic modulus is determined by the ultrasonic pulse velocity test — option D.
Key takeaway
UPV = speed of sound in concrete → elastic modulus + quality assessment. It’s a non-destructive test, unlike compression or split tests.