Pressure Wave Measurement of Clay Conditioned Using an Ultrasonic Signal with Non-destructive Testing (NDT) Methods

Abstract

Every material has its characteristics, if we want to know its characteristics, we usually do mechanical testing. Mechanical testing is usually a destructive test. The purpose of this research is to measure the pressure wave of clay conditioned with the help of an ultrasonic signal. The contribution of this research is to propose a method of measuring the wave propagation of clay by the Non-Destructive Test (NDT) technique using low-cost ultrasonic sensors. The proposed method is to create a system to generate a signal using 40 kHz ultrasonic sensors functioned as a transmitter and receiver with a variance of three samples of clay conditioned. The length of sample 1 is 2.8 cm, sample 2 is 2.9 cm, and sample 3 is 3 cm. This research, using an ultrasonic echo signal to calculate the time interval (t) of the echo signal that can be represented by the value of the velocity of pressure wave (Vp). From the experimental results, the value of sample 1 are t = 62.77 × 10–6 s and Vp = 916.47 m/s, sample 2 are t = 75.27 × 10–6 s and Vp = 870.09 m/s, sample 3 are t = 65.5 × 10–6 s and Vp = 800.08 m/s. The value of the velocity pressure wave shown that the shortest length of the sample also has a higher Vp. The implication of this research is to find other ultrasonic sensors for getting more good results to measuring the propagation velocity in material.