Evaluation of the resistance and the modulus of elasticity of conventional and self-consolidating concretes subjected to high temperature

Abstract

In Brazil, about 90% of the structures of constructions are made of concrete. This great volume of concrete structures was not accompanied by the increase on researches about specific topics, such as concrete structures on fire condition. In Brazil, this subject is regulated by standards NBR 14432: 2001 and NBR 15200: 2012, which are based on the international regulations Eurocode 1, Eurocode 2 and ISO 834. However, the International standards have design recommendations that have not been incorporated into Brazilian standards. Thus, the study of local concretes in order to complement national standards with new design parameters is relevant. The main objective of this paper is to evaluate the influence of the high temperature on compressive and tensile strength and on the modulus of elasticity of two medium strength concretes, one conventional and one self-consolidating. For this, tests for compressive and tensile strength, as well as modulus of elasticity, were performed on cylindrical concrete specimens after being submitted to temperatures of 200, 400 and 600°C.