Evaluación del efecto de altas temperaturas en la resistencia a compresión y flexión de un hormigón polimérico

Abstract

This paper presents experimental results of the effect of temperature on the compressive and flexural strengths of a polymer concrete, using a polyester resin. For the design of the polymer concrete, the Optimum Density method was used as a reference, allowing the voids to be completely filled by the stone aggregates from the Pifo quarry, while the polyester resin served as a binder to bind them together. The specimens, after curing in the environment for 7 days, were exposed in a gas oven for 30 minutes and 1 hour, with a constant increase of 4°C/min until they reached 100°C, 150°C, 200°C and 250°C. After being tested, it is observed that the compressive and flexural strength are directly affected by temperature and exposure time, being impaired at temperatures higher than 200°C; for the compression tests a maximum value of 84 MPa was obtained, while for the flexural specimens a maximum strength of 27 MPa was achieved.