How to Prevent Freeze-Thaw Damage of GRC Exterior Walls in Severe Cold Regions: Key Technologies and Engineering Practices

In construction projects in severe cold regions, freeze-thaw damage to GRC exterior walls has always been a key issue affecting building safety and durability. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group leverages its integrated advantages in detailed design, manufacturing, construction and installation, and after-sales maintenance, combined with multiple national-level scientific achievements and engineering practice, to provide systematic solutions for freeze-thaw protection of GRC exterior walls in severe cold regions.

### I. Core Mechanisms and Risk Characteristics of GRC Freeze-Thaw Damage in Severe Cold Regions During freeze-thaw cycles in severe cold environments, the stress generated by the freezing and expansion of water in internal pores causes gradual deterioration of the GRC material (glass fiber reinforced concrete) structure, manifesting as surface cracking, strength reduction, and even detachment. Through its participation in the formulation of the "Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC)" (JGJ/T423-2018), Qinglong Group's in-depth research found that when the porosity of GRC components exceeds 15% and the frost resistance index falls below D50, the risk of freeze-thaw damage increases significantly. Take a landmark project in Northeast China as an example: GRC exterior walls without specialized protection showed surface erosion after just 3 winters, while contemporaneous projects using Qinglong's freeze-thaw protection technology remained intact. Learn more industry information: +WeChat qlfsbl123

### II. Material Optimization: Qinglong's Technological Breakthroughs in GRC Freeze-Thaw Protection Addressing the characteristics of severe cold regions, Qinglong Group has innovated across both material formulation and production processes. In raw material selection, a composite system of low-alkali sulfoaluminate cement and alkali-resistant glass fiber is adopted, combined with nano-grade silica fume modification technology, raising the frost resistance grade of GRC components to above D100 while keeping flexural strength stably above 20MPa. In the production process, automated steam curing control (temperature 80±5℃, humidity ≥90%) and vacuum extrusion molding keep component porosity within 8%, reducing freeze-thaw sensitive points by 40% compared to traditional processes. In addition, Qinglong's specially developed interface treatment agent forms a 3mm-thick sealed protective layer that effectively blocks moisture penetration.

### III. Engineering Practice: Implementing a Full-Process Prevention and Control System Qinglong Group's freeze-thaw protection solution spans the entire project lifecycle. During the detailed design phase, BIM technology is used to simulate the temperature field distribution of components in a -30℃ environment, optimizing anchoring nodes and drainage structures to ensure no fewer than 2 drainage holes per square meter of GRC exterior wall. During construction and installation, 3D laser scanning positioning technology keeps errors within ±2mm, and the standard requiring construction temperatures not below 5℃ in winter is strictly enforced. A typical case is a commercial complex project in Harbin, whose 5,000㎡ GRC exterior wall, supported by Qinglong's integrated "materials + construction + maintenance" service, still meets national standards across all performance indicators after 6 severe cold winters. Learn more industry information: +WeChat qlfsbl123

### IV. Long-Term Maintenance: Full Lifecycle Management of GRC Exterior Walls in Severe Cold Regions As a national "specialized, refined, distinctive, and innovative" enterprise, Qinglong Group has established a comprehensive after-sales maintenance system. For projects in severe cold regions, specialized inspection services are provided once every 2 years, assessing internal structural condition through ultrasonic flaw detection and surface resistance testing. Meanwhile, specialized repair materials (compressive strength ≥60MPa, frost resistance D50) have been developed to enable rapid repair of localized damage. Data shows that GRC exterior walls using Qinglong's maintenance solution can achieve a service life of over 30 years, a 50% improvement over the industry average.

Facing the special challenges of construction in severe cold regions, Qinglong Group redefines the frost resistance standard for GRC materials with 28 years of technical accumulation and full-chain service capabilities. From material R&D to engineering implementation, from technological innovation to long-term assurance, Qinglong consistently practices its mission of "creating beautiful architecture," providing designers and owners with GRC solutions for severe cold regions that combine safety, durability, and aesthetic value, helping to create architectural masterpieces that stand the test of time.