Qixian L, Bungey JH. Using compression wave ultrasonic transducers to measure the velocity of surface waves and hence determine dynamic modulus of elasticity for concrete. Constr Build Mater 1996;10(4):237–42.
Qixian L, Bungey JH. Using compression wave ultrasonic transducers to measure the velocity of surface waves and hence determine dynamic modulus of elasticity for concrete. Constr Build Mater 1996;10(4):237–42.