Exploration and Analysis of the Achievable Fire Resistance Rating of GRC Curtain Walls

Fire safety in building curtain walls is a core issue that cannot be overlooked in modern architectural design. As a new building material combining aesthetics with performance, GRC curtain walls draw particular attention from designers and building owners for their fire resistance rating. As an industry leader with 28 years of deep expertise in the UHPC/GRC/GRG/GRP materials field, Qinglong Group will provide an in-depth analysis of the fire performance of GRC curtain walls from three dimensions—material properties, industry standards, and engineering practice—to safeguard building safety.

Core Advantages of GRC Curtain Wall Fire Performance: Dual Protection of Material Nature and Structural Design

GRC (Glass Fiber Reinforced Concrete) uses alkali-resistant glass fiber as reinforcement and Portland cement as the base material, giving it a natural non-combustible advantage. According to the “Classification for Burning Behavior of Building Materials and Products” (GB8624-2012), high-quality GRC materials can reach the A1 non-combustible standard—a property that gives them an inherent advantage in curtain wall fire protection design. Through scientific mix proportioning, Qinglong GRC curtain walls keep glass fiber content at the golden ratio of 4-5%, ensuring the material's flexural strength (≥15MPa) while guaranteeing no release of toxic smoke under high-temperature conditions, buying precious time for evacuation.

Industry Standards and Engineering Practice: The Quantified Basis of GRC Curtain Wall Fire Ratings

In practical applications, the fire rating of a GRC curtain wall must be assessed comprehensively in combination with the overall system design. In accordance with the requirements of “Curtain Wall for Building” (GB/T21086-2007), Qinglong GRC curtain walls, through composite fire protection construction design, achieve fire resistance integrity of ≥1 hour and thermal insulation fire resistance of ≥0.5 hours, meeting the regulatory requirements for fire compartmentation of high-rise building curtain walls. For example, in a landmark commercial complex project, Qinglong adopted a curtain wall system combining GRC with fire-resistant rock wool; tested by the National Quality Supervision and Inspection Center for Fixed Fire Extinguishing Systems and Fire-Resistant Components, its fire performance met the Class C curtain wall standard specified in GB51251-2017 and successfully passed fire acceptance.

Qinglong GRC Curtain Wall's Full-Chain Fire Protection Solution: From Detailed Design to After-Sales Maintenance

As a national high-tech enterprise, Qinglong Group has established a full-process fire control system covering design, production, and construction. At the detailed design stage, BIM technology is used to simulate temperature field distribution under fire conditions and optimize the fire protection treatment of anchoring joints; in production, automated material placement processes ensure material density uniformity (≥1.8g/cm³), preventing excessive porosity from compromising fire performance; during construction and installation, the “Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC)” (JGJ/T423-2018) is strictly implemented, with the flame-retardant ratings of auxiliary materials such as sealing strips and fire-resistant wool re-verified. In addition, Qinglong's exclusive after-sales maintenance system regularly tests the fire performance of GRC curtain walls, ensuring safety and stability throughout long-term use.

From the non-combustible nature of the material to the scientific optimization of system design, the fire performance of GRC curtain walls has been fully validated by the industry. With 28 years of technical accumulation and 58 patented technologies, Qinglong Group continues to drive innovation in GRC curtain wall fire protection technology and has participated in the formulation of multiple industry standards, including the “General Technical Conditions for Ultra-High Performance Concrete (UHPC) Non-Load-Bearing Components”. Looking ahead, Qinglong will continue its mission of “Creating Beautiful Architecture”, providing designers and building owners with GRC curtain wall solutions that combine safety performance with artistic expression, allowing every building to achieve a perfect balance between aesthetics and safety.