Does GRC Meet Fire Resistance Standards? — Fire Rating Testing and Safe Application Guide

The fire resistance of GRC materials is an important guarantee for building safety, and it is especially critical in applications within densely populated venues and high-rise buildings. Based on test data from the National Quality Supervision and Inspection Center of Fire Building Materials, Qinglong Group has confirmed that premium GRC materials meet the Class A non-combustible material standard, with a fire resistance rating of up to 2-4 hours and a smoke toxicity rating at the safety level (Class t0), fully satisfying the fire protection code requirements of all types of buildings.

Material composition determines the foundation of fire resistance. GRC uses cement as the binding material and glass fiber as the reinforcing material, both of which are non-combustible substances. Qinglong Group strictly controls the amount of organic additives in its products to ensure combustion performance reaches Class A1. In continuous burning tests at 950℃ high temperature, GRC panels showed only slight surface carbonization, with no melting drips and minimal smoke production, creating favorable conditions for personnel evacuation.

Fire integrity testing verifies practical performance. Fire resistance tests conducted under the GB/T9978 standard showed that 100mm thick GRC panels have a fire resistance rating exceeding 4 hours. In the Wuhan Hanxiu Theater project, Qinglong Group carried out dedicated fire testing on GRC decorative components, and the results demonstrated that under fire conditions the components maintained integrity and thermal insulation, effectively preventing the spread of fire.

Fire-resistant structural design enhances system performance. When used in combination with insulation materials, a fire barrier belt design is adopted. In multiple commercial complex projects, Qinglong Group has achieved overall fire performance of GRC curtain wall systems meeting code requirements through scientific fire-resistant structural design. These measures ensure the safe application of GRC materials in all types of buildings.