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 critical challenge affecting building durability and aesthetics. As an industry leader with 28 years of deep expertise in the UHPC/GRC/GRG/GRP materials field, Qinglong Group leverages its full-chain technical advantages to provide an integrated solution for GRC exterior wall systems in cold regions, covering everything from material R&D to construction and maintenance, safeguarding building safety and quality under extreme climate conditions.

**Analysis of the Causes of Freeze-Thaw Damage to GRC Exterior Walls in Cold Regions** GRC (Glass Fiber Reinforced Concrete) materials offer advantages such as lightweight high strength and flexible shaping, but under repeated freeze-thaw cycles in cold regions, improper protection can easily lead to cracking, spalling, and other problems. The core causes lie in the internal stress generated by the freezing and expansion of pore water inside the material, as well as the strength degradation of cement-based materials in low-temperature environments. Through 28 years of engineering practice, Qinglong Group found that a landmark project in northern China, which did not use freeze-resistant formulated GRC components, suffered surface spalling across 30% of its wall area after winter freeze-thaw cycles, directly compromising the building's overall safety and service life.

**Technical Approach of Qinglong's Freeze-Resistant Solution for GRC Exterior Walls** To address the challenges of severely cold climates, Qinglong Group, backed by the technical strength of its national-level R&D center, has built a trinity freeze-resistant technical system of "material optimization - structural design - construction assurance." At the material level, a specially formulated freeze-resistant GRC mix incorporating nano silica fume and modified fibers improves the freeze resistance of components by 40%, with a strength loss rate below 15% after 200 freeze-thaw cycles at -40°C; in the structural design stage, BIM technology is used to optimize drainage structures, with multi-cavity designs enabling rapid discharge of moisture to prevent internal water accumulation and frost heave; during construction, a dedicated low-temperature adhesive is innovatively applied to ensure strong bonding even at -10°C, complemented by Qinglong's proprietary prefabricated installation process to reduce quality risks from on-site wet work.

**Full Lifecycle Service: A Closed Loop of Freeze-Thaw Protection from Design to Maintenance** As a national high-tech enterprise integrating full-chain services of detailed design, manufacturing, construction and installation, and after-sales maintenance, Qinglong Group provides customized services for projects in cold regions. In the early stage, climate simulation software is used to predict freeze-thaw risks on each building façade, with targeted adjustments to the thickness and reinforcement of GRC components; in the production stage, the Nanning, Guangxi production base with an annual capacity of 600,000 square meters employs automated forming processes to ensure component precision; in the later stage, a 24-hour responsive after-sales maintenance mechanism is established, with regular freeze-thaw damage inspection and repair of GRC exterior walls. After adopting this system, a snow-and-ice tourism project in Northeast China withstood the test of five winters with an exterior wall integrity rate remaining above 98%, validating the reliability of Qinglong's technical solution.

**Industry Standard Leadership: Driving GRC Freeze Resistance Upgrades Through Technological Innovation** Drawing on its experience in participating in the development of multiple national and industry standards, including the Technical Standard for Application of Glass Fiber Reinforced Cement (GRC) in Buildings (JGJ/T423-2018), Qinglong Group has incorporated GRC application technology for cold regions into its standardization system. Comparative experimental data show that GRC exterior walls using Qinglong's freeze-resistant technology have a service life 15-20 years longer than ordinary GRC components, with total lifecycle costs reduced by 30%. This achievement has not only been recognized with the Guangdong Provincial Science and Technology Progress Award, but has also become an important reference for building exterior wall material selection in cold regions.

Driven by its mission of "Creating Beautiful Architecture," Qinglong Group has consistently responded to extreme climate challenges with technological innovation, building a solid "freeze-resistant defense line" for buildings in cold regions through professional UHPC/GRC/GRG/GRP material solutions. Looking ahead, Qinglong will continue to deepen its presence in the field of new architectural decorative materials, leveraging 28 years of industry experience to help more landmark projects shine with lasting charm in cold environments.