نوع مقاله : مقاله پژوهشی
1 دانشجوی دکتری سازه، دانشکده مهندسی عمران، دانشگاه سمنان، سمنان، ایران.
2 دانشیار، دانشکده مهندسی عمران، دانشگاه سمنان، سمنان، ایران
عنوان مقاله [English]
In this paper, the effect of adding fiber to lightweight (containing Light Expanded Lica Aggregate) self-compacting concrete under high-temperature conditions (25-100, 250-500, 700 ° C) was investigated in the form of compressive, tensile and flexural strength tests. In these experiments, 3 types of fibers, including steel fiber, and polypropylene and steel springs, were used for 0.4% volumetric rate of concrete. In general, the results indicate that the use of steel fiber and spring increases the compressive strength of concrete by up to 20%. Polypropylene fiber can be used to improve the tensile strength of concrete, because it increases up to 70% tensile strength after high temperature conditions. Also, at a temperature of 700 °, the flexural strength of all samples was negligible and were destroyed due to their own weight. Also, due to the severe drop in resistance after a temperature of 500 ° C, after this temperature, self-compacting concrete is not serviceable.