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

In construction projects in severely cold regions, freeze-thaw damage to GRC exterior walls has long been a focal concern for the industry. This article addresses both prevention strategies and technical measures, drawing on Qinglong Group's 28 years of full-chain experience in the GRC materials field, to provide systematic solutions for designers, owners, and other professionals.

Causes of Freeze-Thaw Damage to GRC Exterior Walls and Industry Challenges

As a lightweight, high-strength new decorative building material, GRC (Glass Fiber Reinforced Concrete) faces particular challenges when applied in severely cold regions. When ambient temperatures fluctuate repeatedly around the freezing point, the moisture inside GRC undergoes freeze-thaw cycles, gradually damaging the material structure, manifesting as surface cracking, reduced strength, and even detachment. During its participation in drafting the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), Qinglong Group found that approximately 30% of GRC exterior wall projects in severely cold regions experienced varying degrees of freeze-thaw damage within 5 years due to unreasonable material mix ratios or improper construction techniques.

Core Strategies for Preventing Freeze-Thaw Damage

In response to the climatic characteristics of severely cold regions, Qinglong proposes a trinity prevention strategy of "material optimization + structural design + construction control." At the material level, by adjusting the cement-based material mix ratio and introducing ultra-fine silica fume and high-efficiency water reducers, the porosity of GRC is controlled below 15%, while alkali-resistant glass fiber reinforcement ensures a flexural strength of ≥12MPa. In structural design, an innovative "breathing" construction is adopted, with drainage channels and thermal insulation isolation layers effectively reducing moisture intrusion and thermal stress.

Practical Application of Full-Chain Technical Measures

As a national-level high-tech enterprise integrating detailed design, manufacturing, construction and installation, and after-sales maintenance, Qinglong has developed a complete solution for freeze-thaw resistance in GRC exterior walls. In the production phase, automated production lines control mix ratio precision, and steam curing ensures complete hydration reactions; during the construction phase, winter construction specifications are strictly enforced, specialized interface treatment agents are used to enhance bonding strength, and BIM technology is employed for pre-assembly simulation; in the after-sales phase, a regular inspection system has been established, using infrared detection technology to assess the health of internal structures.

Industry-Leading Freeze-Thaw Resistant Solutions

With 28 years of technical accumulation and engineering practice, Qinglong GRC has been successfully applied to multiple landmark projects in severely cold regions such as Northeast and Northwest China. Its developed "freeze-thaw resistant GRC exterior wall panels" passed 200 freeze-thaw cycle tests at -40℃ while maintaining over 90% of their initial performance indicators, reaching an internationally advanced level. As a vice-chairman unit of the China GRC Association, Qinglong has always adhered to the values of "honesty, perseverance, trust, and collaboration," committed to providing customers with full life-cycle services from material selection to later-stage maintenance, helping buildings in severely cold regions achieve a perfect unity of safety and aesthetics.