FIBER-REINFORCED CONCRETE IN A FIRE SITUATION

Abstract

Fires pose a significant threat to structures, and can cause collapses due to the physical, chemical, and mechanical transformations in reinforced concrete. In Brazil, standards such as ABNT NBR 15575 and NBR 14432 regulate fire safety, requiring that the project contemplate fire resistance (TRF). The case of the Wilton Paes de Almeida building, which collapsed in 2018, exemplifies the severe damage of a poorly controlled fire. The addition of fibers to concrete is a standout measure to improve performance at high temperatures, especially against peeling. Fire resistance is evaluated by the time that an element maintains stability, tightness and thermal insulation under standardized conditions.