The purpose of this study is to evaluate the mechanical strengths and ultrasonic pulse velocity (UPV) supersulfated cement mortar incorporating sodium sulfate (Na 2 SO 4 ) with various amounts 3 at 0 wt.%, 2.5 7.5 10 wt.%. results exhibited that inclusion Na could significantly improve 28-day compressive strength by about 2.94 4.26 times higher flexural 2.89 3.78 higher, when compared mixture w...

The well-known thermo-elastic effect of laser irradiation can be exploited to produce strong localized stresses when an expanded, long pulse, low-intensity laser beam is used to irradiate the specimen. These stresses will produce a parametric modulation of the received ultrasonic signals, that is somewhat similar to the acousto-elastic effect often used in nonlinear ultrasonic studies. It is sh...

The effects of applied tensile stresses on the temperature dependence of 10 MHz ultrasonic longitudinal velocity have been studied in three types of commercial aluminum alloys, 6064-T4, 2024-T351, and 3003-T251. In all measurements, it is found that the velocity decreases linearly with temperature, and the slope of the linear relationshi'p changes considerably as a function of applied tensile s...

In this article, experimentally determined values of sound velocity in LPG in a temperature range (–23...+55) °C are presented. The measurements were taken using two industrial LPG samples in a standard five liter pressurized gas tank. The propagation time of a ultrasonic signal with the frequency of 0.7 MHz was measured. To increase the accuracy of measurement, a pulse-phase method was applied...

The subject of the paper is simulation and measurements of an ultrasonic field in an isotropic homogeneous medium with attenuation. The complex problem of simultaneous influence of wave diffraction, attenuation, and velocity dispersion occurs. Only few publications can be mentioned on this subject. For example in [1] is presented an investigation of the complex problem of ultrasound field distr...

According to the shortcomings of the existing ultrasonic wind velocity measurement device, for instance, complexity of circuit and difficulty of signal processing, a new ultrasonic wind velocity measurement is put forward based on phase discrimination and a new sensor configuration as well. Thus, a system model is built. Firstly, an equilateral triangle should be constituted by an ultrasonic em...

In this study, the mechanical properties of normal concrete (NC) and lightweight (LC) were measured upon exposure to high temperatures (20, 100, 200, 300, 500, 700 °C). Then, analysis was conducted predict residual modulus elasticity through ultrasonic pulse velocity. Crushed granite aggregate mixed as coarse for NC coal-ash LC. The effect water-to-binder (W/B) ratio (0.41, 0.33, 0.28) on (resi...