Acoustic Emission monitoring of high-strength concrete beams with and without fibers exposed to high temperature

In this work, cracking and mechanical degradation processes of concrete elements using acoustic emission technique are examined, with the objective of analyzing the incidence of high temperatures on the failure behavior of high-strength concrete beams with and without fibers.

Results of an experimental campaign including different mechanical tests on concrete specimens with and without the addition of a hybrid combination of steel and polypropylene fibers are presented. The incorporation of polypropylene fibers is intended to improve the behavior of concrete against elevated temperatures. The evolution of acoustic emission measurements during bending tests and its relation with the mechanical response is analyzed.