Does GRC Meet Fire Performance Standards? Analysis of Combustion Performance and Safety Assurance

GRC fully meets fire resistance standards and is classified as a Class A non-combustible material. It produces no open flame and releases no toxic gases during combustion, with extremely low smoke toxicity. It complies with building fire safety codes and is an ideal decorative material for public buildings and high-rise buildings.

I. Core Fire Performance Indicators: Full Compliance with National Standards

All fire performance indicators of GRC meet national mandatory standards. Combustion performance class: According to GB 8624-2012 Classification of Burning Behavior of Building Materials and Products, GRC is a Class A non-combustible material with no combustibility; it extinguishes immediately once the open flame is removed. Smoke toxicity: The smoke produced during combustion is non-toxic. Tested under GB/T 20284-2006 Single-Burning Item Test for Building Materials or Products, the smoke toxicity reaches Class ZA1 (the lowest toxicity class) and poses no harm to human health. Heat value and burning droplets: GRC has an extremely low heat value, far below the standard for combustible materials, and produces no molten droplets during combustion, preventing secondary fires. Qinglong products have a smoke density rating (SDR) ≤25, far below the national standard limit (SDR ≤75).

II. Core Principles of Fire Resistance: Inorganic Material Properties

The fire resistance advantage of GRC stems from its material nature. Inorganic substrate properties: Its main components are inorganic materials such as cement and quartz sand, which are inherently non-combustible and non-flame-supporting, releasing no combustible gases at high temperatures. Compared with organic decorative materials (such as wood and plastic), GRC has a natural advantage in fire performance. Flame-retardant role of fibers: Alkali-resistant glass fiber is an inorganic fiber that does not burn or produce toxic gases. It retains a certain strength at high temperatures, preventing structural collapse and fire spread. The alkali-resistant glass fiber selected by Qinglong maintains over 50% of its tensile strength even at 600°C. Dense structure: GRC substrate has high compactness and low porosity, effectively blocking flame penetration and delaying heat transfer, buying time for occupant evacuation.

III. Fire Safety in Practical Applications: Verified by Real Scenarios

Numerous engineering cases confirm the fire safety reliability of GRC. Public buildings: In crowded venues such as theaters, shopping malls, and stadiums with high fire safety requirements, GRC is widely used for ceilings, walls, and partitions. The GRC decorative panels at Qinglong's Wuhan Hanxiu Theater passed fire acceptance testing, effectively blocking flame spread during a fire and ensuring safe audience evacuation. High-rise buildings: Exterior walls and curtain walls of high-rise buildings require fire resistance. As a Class A non-combustible material, GRC reduces fire risks. The GRC curtain wall at Qinglong's Shenzhen Longhua Xiangshan Science and Technology Park complies with high-rise building fire codes and passed special acceptance by the fire department. Industrial buildings: Factories in the chemical, power, and other industries have strict requirements for fire and explosion protection. GRC is suitable for both interior and exterior decoration. The custom GRC exterior wall panels Qinglong made for a chemical industrial park achieved fire performance meeting explosion-proof building requirements, gaining industry recognition.