الفهرس 
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Abstract
The buildings and installations are one of the most important components of the economy of countries, so they must be protected from fires that cause them severe damage as well as lives of people become in danger. Thus, the researchers work on developing manufactured materials of the buildings especially the concrete to become more fire resistant. However, the concrete structures need further development to protect the reinforcing steel and keep up concrete strength from the negative effect of fire, so the basic aim of this thesis is to study the production and the performance of concrete made of pumice stone (PS) as a different replacement of coarse aggregate (25%, 50%, 75% and 100% by volume) and aluminum powder (AP) as an addition by ratios (0.1, 0.3 and 0.5%) of cement weight in the fire condition (with periods 1 and 2 hours, at different temperatures varied of 200-800°C) to get concrete that can resist the fire well. In addition, the flexural behavior of Reinforced beams made of PS with AP was studied after fire and rehabilitation by different techniques (concrete jacket, steel plates and carbon fiber reinforced polymer (CFRP)). Also, suppression of fire of concrete was studied using different methods. The performance was determined by investigating compressive strength, flexural strength, modulus of elasticity, bond strength, weight loss, water absorption, water permeability, visual inspection, thermogravimetric analysis (TGA) and scanning electron microscope (SEM). As a result, the increase in replacement ratio of PS with a fixed content of AP has a positive influence on mechanical properties and bond strength during exposure to fire. For examples, the residual bond strength increased in the range 21-53% by increasing PS content from 25% to 100% as a replacement of coarse aggregate by volume. The thermogravimetric analysis curve shows that the early weight loss is at temperatures of 30-ABSTRACT VI 120 °C, with a rate of weight loss in the range 0.6%-1.2%, for all mixtures, while total weight loss at 800°C was in the range 14.5%-19.6%. Moreover, the compositions of concrete that contains PS with AP are the highest resistance to thermal decomposition and the least in weight loss, according to results of TGA. In addition, the rehabilitation by concrete jacket is the best technique on the flexural behavior in this study and then comes rehabilitation by steel plates. Also, rehabilitation by CFRP has a positive effect on flexural behavior but need to improvement of glued method. Two numerical models were created by using the artificial neural networks; the model enables prediction of the proportions, components and mechanical properties of concrete mixtures, allowing it to design the mixtures with high-efficiency.