Research on Prevention Strategies and Technical Measures for Freeze-Thaw Damage of GRC Exterior Walls in Severe Cold Regions

In construction projects in severe cold regions, freeze-thaw damage to GRC exterior walls has long been a critical issue affecting building durability. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group deeply understands the importance of material performance and environmental adaptability, and through technological innovation and engineering practice, provides systematic freeze-thaw prevention solutions for GRC exterior wall systems in severe cold regions.

Freeze-Thaw Challenges and Core Mechanisms of GRC Materials in Severe Cold Environments

GRC (Glass Fiber Reinforced Concrete) is widely used for the exterior wall decoration of landmark buildings thanks to its light weight, high strength, and flexible formability. However, in extreme environments with sub-zero temperatures and repeated freeze-thaw cycles, the volume expansion (approximately 9%) caused by pore water freezing inside the material leads to the propagation of micro-cracks, which in turn causes surface spalling, strength degradation, and other defects. Through 2,000 freeze-thaw cycle tests, Qinglong Group's technical team found that ordinary GRC can suffer a flexural strength loss of up to 35% at -20℃, whereas GRC components made with a dedicated frost-resistant formula keep strength loss within 8%. These data provide a key basis for material selection in severe cold regions.

Full-Process Technical Strategy for Freeze-Thaw Prevention of GRC Exterior Walls in Severe Cold Regions

Qinglong Group has built a three-level protection system covering material R&D, detailed design, and construction techniques. At the material level, a low-alkali sulphoaluminate cement matrix is adopted, blended with nano-scale silica fume and modified polypropylene fibers, raising the impermeability grade of GRC components to P12 and reducing porosity to below 15%. In the design phase, BIM technology is introduced to simulate temperature stress distribution, with thickened reinforcement applied to freeze-prone areas such as internal and external corners and window sills, and XPS insulation layers integrated to form a composite structure. In construction, an innovative "pre-curing - low-temperature maturation" process ensures that components can still complete hydration reactions at -5℃, while a dedicated low-temperature adhesive has been developed to guarantee anchoring strength for winter construction.

Engineering Verification and Industry Value of Qinglong's GRC Frost-Resistant Technology

As a contributing editor of the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), Qinglong Group successfully applied its frost-resistant technology to an ice-and-snow theme park project in Northeast China. The project adopted customized GRC exterior wall panels; after three winters of testing, the surface integrity rate reached 98%, far exceeding the industry average. This practice not only verified the effectiveness of the technical solution but also expanded the application boundaries of GRC materials in severe cold regions. The company's "Frost-Resistant GRC System for Severe Cold Regions" has obtained 3 invention patents, and its technical achievements have been incorporated as a reference in the development of the industry standard General Technical Requirements for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC).

Facing the global trend of increasingly extreme climates, Qinglong Group has always upheld the mission of "creating aesthetically beautiful buildings", continuously optimizing the environmental adaptability of composite materials such as GRC/UHPC through the deep integration of materials science and engineering technology. For building projects in severe cold regions, it is recommended to choose a supplier with full-chain service capabilities to deliver an integrated solution covering material formulation, structural design, construction, and maintenance—only in this way can freeze-thaw damage be fundamentally solved, achieving a lasting unity of architectural aesthetics and structural safety.