The Effect of Glass Fiber on Concrete and Reinforced Concrete Beam under Elevated Temperature

Abstract

Any service structures could suffer in unexpected time from one of the most serious accidents is fire accidents. A small source is sufficient for a fire accident to be ignited, but its shore is difficult to control. In Ethiopia, so many fire accidents took place that in the near past have taken lives and house damage. For example, Merkato area burnt down nearby shops at the Greater Anwar Mosque in Addis Ababa. The cause of the accident has been investigated and a great number of homes and lives have been demolished. A long fire period leads to structural failure, loss of valuable lives, etc. The use of advanced finite elements and structural analysis models to determine the fire growth within a compartment is currently undergoing good development to determine temperatures within the component through a heat transfer analysis. This study focussed more on the influence of fiberglass under high temperature on concrete and reinforced concrete beams. In this study, different fiber glass percentage, concrete temperature and fire exposure duration were discussed. Experimental tests on both conventional and fiber-powered concrete at high temperatures have been done and the compressive strength of the concrete cube is found to be reduced to 37.41% for two hours at a 3000c temperature relative to initial concrete compression strength. Concrete cylinder tensile strength decreases up to 20 percent at 3,000 cm for two hours, relatively with initial concrete tensile strength, and the reinforced concrete beam’s load-resisting capacity decreases to 21 percent with 3,000 cm held for two hours. But by adding 0.75% of the fiber on concrete, the compressive strength increases to 21% compared to normal cements. The concrete with 0.75% fiber increases the divided tensile strength by 29% over regular cement. The load resistance capacity for beams with 0.5% fiber at the same temperature exceeds 9.4%. Thus fiber glass concrete has a high resistance to load and a high fire resistance than conventional concrete.