MEASUREMENT OF LOCAL MECHANICAL CHARACTERISTICS OF MARBLE BY BROADBAND ULTRASONIC STRUCTUROSCOPY

The internal structure of marble is investigated. A precise measurement of the speeds of longitudinal and moving waves in marble samples. The internal structure of samples is visualised and localised microcracks. The geometric sizes of the microcracks are determined. Using the obtained velocity values, the Young's modulus and porosity were calculated. According to the research and calculations, the effectiveness of using marble as a facing stone in urban and industrial areas was made.