Probable compressive strength and modulus of elasticity of concrete, determined by Non Destructive Ultrasonic Pulse Velocity Method (NDUPVM) in different ways of measuring transducers placement

This article describes the experimental studies to determine the compressive strength and modulus of elasticity of concrete in 12 reinforced concrete beams at the age of 5 years using a non-destructive ultrasonic pulse velocity method (NDUPVM). The probable compressive strength and modulus of elasticity were determined by a portable ultrasonic device Proceq - TICO, according to EN 12504-4: 2004. The results were evaluated for three different ways of positioning the transmitter and receiver - direct transition, semi-direct transition and indirect or surface transition. The compressive strength and modulus of elasticity were calculated accordingly the experimental results. The results were compared with theoretically calculated according to EN 1992-1-1. Experimental beams are made by concrete class C25/30, fine fraction of coarse aggregate (dmax=12 mm), consistency S3.