Residual strength of normal concrete reinforced with aluminum fiber at elevated temperatures.

Civil construction faces an immense challenge due to the damages caused by fire during the construction and service phases. Therefore, it is important to study fire being one of the most severe environmental conditions affecting structures in order to mitigate its effects. Moreover, fiber has been generally discovered to be effective as a reinforced material to improve the strength of concretes. This research was conducted to analyze the residual strength of concretes reinforced with aluminum fibers when exposed to high temperatures. This involved the preparation of 25 MPa concrete specimens with the addition of 0.2% fiber contents exposed to 400 °C and 800 °C temperature for 30 minutes after which their compressive and split cylinder strengths were measured. The result showed the fiber increased the compressive strength by 14.37%, 14.90%, and 2.00%, and the split cylinder strength by 47.27%, 44.29%, and 32.09% at 25°C, 400°C, and 800°C respectively in comparison with the normal concrete. [ABSTRACT FROM AUTHOR]