الفهرس 
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Abstract
1:-Introduction: - Self compacting concrete (SCC) is defined as a concrete with high workability it can flow under its own weight without any vibration. The SCC exposed to spalling at elevated temperature appear higher spalling comparison to normal concrete relatively. Adding Fibers on SCC decreases the spalling and improves ductility, tensile strength, and durability. 2:- Research scope: - Fire resistance of concrete by using different type of fibers (steel fibers, glass fibers, Polypropylene fibers and hybrid fibers) and study the effect of adding fibers on properties of self-compacting concrete subjected to elevated temperatures. 3:- Research objective: - The objectives of the research work to study the effect of adding different type of fibers (steel fibers, glass fibers, polypropylene fibers and hybrid fibers) on properties (compressive strength, tensile strength, flexural strength, mass loss ratio, and ultrasonic pulse velocity) of self-compacting concrete subjected to elevated temperatures. 4:- Steps Study: - in this the previous researches which studying the use of fibers in the self-compacting concrete subjected to elevated temperatures were discussed, materials used in this research were tested to determine the properties of these materials, then concrete mixes were designed using different type of fibers to study the effect of adding fibers on the properties of self-compacting concrete subjected to elevated temperatures. 5:- Summary of Study:- The results show that the compressive strength, tensile strength and flexural strength increased with the increasing temperature up to 200 °C and decreased at a temperature higher than 200°C. The PP fibers reduced and eliminated the risk of the spalling in the SCC. With increasing temperature the concrete mixes including steel fibers and hybrid fibers appear the best mechanical properties and spalling resistance. The weight losses for the SCC mixtures with PP and steel fiber were lower than those without PP and steel fibers. In general, fibers decreased fresh concrete properties.