Through-Transmission Impact Method for Measuring Sound Vibration Velocity in Compact Concrete Cubic Samples

This study discusses ultrasonic and impact-echo methods as the most common nondestructive methods for determining concrete durability based on sound vibration velocity. It also reveals the influence of the signal of an acoustic surface wave on the accuracy of measuring resonant frequency in the spectrum of a cubic compact concrete sample. A through-transmission impact method is proposed to measure sound vibration velocity in cubic test concrete samples and determine concrete durability via an acoustic nondestructive method. An impactor and a receiving transducer are placed on opposite sides of the cube, several measurements are made at different positions of the impactor (or receiving transducer), and results of partial measurements are subjected to multiplicative processing to eliminate sound vibration and reduce errors in determining concrete durability.