Performance Evaluation of Fireproof Paint and Spray-Type Fireproofing Materials via Heating Experiments

Various strengthening methods are applied to ensure the fire resistance performance of structures. Specifically, steel-framed structures should be fireproofed as they are relatively less fire-resistant than concrete structures. In general, sprayed fireproof materials and fireproof paint are widely applied to improve the fire resistance of steel structures. Fireproof paint improves fire resistance performance by forming an air insulation layer on the surface of members along with volume expansion due to chemical reactions during a fire. This in turn delays the rate of flame temperature transfer to the steel members. In the case of spray-type fireproofing materials, the fire resistance performance of structural members is improved by the insulation performance of the material itself without physical changes. In this study, the fire resistance performance of refractory materials (fireproof paint and spray-type fireproof materials) was experimentally evaluated with respect to exposure temperature, and the differences in insulation performance with respect to each material were confirmed. Additionally, based on the experimental results, the necessity for improving the performance certification system of current fireproof materials was suggested.