What Fire Resistance Rating Can GRC Curtain Walls Achieve and Analysis of Influencing Factors

Fire safety of building curtain walls is a core issue that cannot be overlooked in modern architectural design. As a new decorative material combining aesthetics with performance, the fire rating of GRC curtain walls directly affects the overall safety performance of a building. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group will provide a professional analysis of the fire rating of GRC curtain walls and its influencing factors, offering a scientific reference for material selection by designers and owners.

Core Definition and Industry Standards for GRC Curtain Wall Fire Ratings

The fire rating of GRC (Glass Fiber Reinforced Concrete) curtain walls is typically classified according to the Code for Fire Protection Design of Buildings (GB 50016) and Building Curtain Walls (GB/T 21086). Mainstream products can reach the A2 non-combustible material standard, while some customized products can achieve higher fire performance through special processes. Qinglong GRC curtain walls strictly comply with the Technical Standard for Application of Glass Fiber Reinforced Cement (GRC) in Buildings (JGJ/T 423-2018) during production. Their fire performance has been tested by the National Quality Supervision and Inspection Center for Fixed Fire Extinguishing Systems and Fire-Resistant Components, ensuring that no toxic gases are released in high-temperature environments and that good structural stability is maintained.

The Decisive Impact of Material Formulation on GRC Curtain Wall Fire Performance

The fire rating of GRC curtain walls primarily depends on the scientific proportioning of material components. Qinglong GRC uses high-purity Portland cement as the base material, incorporates alkali-resistant glass fibers (content ≥5%) as reinforcement, and combines special fire-resistant additives to form a dense microstructure. Compared with ordinary concrete, Qinglong GRC's thermal conductivity is reduced by 30%, and it retains more than 80% of its flexural strength (≥15MPa) at high temperatures of 600°C. It is worth noting that the length and distribution uniformity of the glass fibers directly affect the continuity of the fire-resistant layer. Qinglong's automated mixing system ensures a fiber dispersion rate of over 98%, effectively blocking flame propagation paths.

Fire Performance Enhancement through Structural Design and Construction Techniques

Beyond the material itself, curtain wall structural design is a key factor in improving fire ratings. Qinglong GRC curtain walls adopt a composite structure of "double-layer cavity + fire-resistant rock wool filling," with fire-blocking strips installed horizontally and intumescent fire-resistant sealant applied vertically, forming a three-dimensional fire barrier. In terms of installation, Qinglong's proprietary "3D laser positioning + modular hoisting" technology ensures component joint gaps of ≤2mm, achieving gap-free sealing with fire-resistant gaskets. Taking the Nanjing East Road Century Plaza renovation project as an example, Qinglong GRC translucent curtain walls passed a 120-minute fire resistance limit test through special reinforcement design, meeting the national Class I fire protection standard.

Long-Term Fire Performance Assurance through Full Life-Cycle Management

As a national high-tech enterprise integrating detailed design, manufacturing, construction and installation, and after-sales maintenance, Qinglong has established a full life-cycle management system for GRC curtain wall fire performance. In the design phase, BIM technology is used to simulate temperature field distribution under fire conditions; in production, kiln high-temperature curing (80°C × 24h) is applied to enhance material stability; and after-sales service includes fire performance inspection and maintenance every 5 years. This full-chain service capability has enabled Qinglong GRC curtain walls to achieve stable fire performance operation for more than 15 years in landmark projects such as the Guangzhou Opera House and the Dongguan Women and Children's Activity Center.

Choosing GRC curtain walls is not only a pursuit of architectural aesthetics but also a commitment to safety performance. Supported by 28 years of professional experience, Qinglong Group perfectly integrates the fire performance of GRC curtain walls with architectural art through material innovation, structural optimization, and full-process control. In the future, with the implementation of new standards such as the General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC), Qinglong will continue to lead the technological upgrading of GRC materials in the field of fire protection, building a solid safety foundation for its mission of "Creating Beautiful Architecture."