Indicators for Measuring the Durability of Exterior Wall GRC Systems and Research on Improvement Strategies

The durability of building exterior walls not only concerns the long-term presentation of architectural aesthetics, but is also a core element in ensuring structural safety and reducing maintenance costs. As an industry leader with 28 years of deep expertise in the UHPC/GRC/GRG/GRP materials field, Qinglong Group has always relied on scientific data and, through full-chain technological innovation, provides systematic solutions for the durability of building curtain walls and decorative systems.

1. Core Metrics for Measuring GRC System Durability: From Material Essence to Engineering Practice

Evaluating the durability of exterior wall GRC systems requires building an indicator system from three dimensions: material performance, structural design, and environmental adaptability. The first is the mechanical performance indicators of GRC materials, including flexural strength (high-quality GRC can reach over 20MPa), elastic modulus, and impact resistance—these data directly determine the ability of components to withstand external forces such as wind pressure and vibration. The second is durability indicators, such as freeze-thaw cycle resistance (the standard requires ≥200 cycles), impermeability (penetration height ≤5mm), and the aging resistance of alkali-resistant glass fiber, which are key to GRC's long-term stability under complex climatic conditions. In addition, system construction indicators are equally important, including the tensile load capacity of anchoring nodes, joint sealing performance, and compatibility with insulation layers. The "Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC)" (JGJ/T423-2018), compiled with the participation of Qinglong, imposes strict specifications on these indicators.

2. Multi-Dimensional Improvement Strategies: Qinglong's Practical Path Built on 28 Years of Technical Accumulation

At the material innovation level, Qinglong adopts a composite process of high-purity alkali-resistant glass fiber and low-alkali cement, combined with its independently developed mineral admixture formula, improving the crack resistance of GRC components by more than 30%. In production, German-imported spray molding equipment is introduced, achieving a fiber distribution uniformity error of ≤5% and ensuring material performance stability. Addressing climatic differences across regions, Qinglong provides customized solutions—increasing antifreeze admixture in cold regions and strengthening hydrophobic treatment in high-humidity environments; overseas projects such as a landmark building in Malaysia have also passed the C5-M high-corrosion environment test specified in ISO 12944-2.

In terms of structural optimization, Qinglong applies BIM technology for parametric node design and has developed a composite anchoring system of "double bolts + elastic washers," increasing the anchoring force to 1.5 times that of traditional solutions. During construction, 3D laser scanning positioning is used, with installation precision controlled within ±2mm, effectively avoiding stress concentration caused by installation deviation. Notably, Qinglong's original "GRC-insulation integrated" system, through the coordinated design of the structural layer, insulation layer, and finish layer, increases the overall thermal resistance by 40% while reducing durability damage caused by thermal bridging effects.

3. Full Lifecycle Management: Closed-Loop Assurance from Project Consulting to After-Sales Maintenance

As a national high-tech enterprise, Qinglong has established a full-chain service system covering detailed design, manufacturing, construction and installation, and after-sales maintenance. In the early project stage, the technical team provides durability assessment reports based on factors such as building height and climatic conditions; RFID chips are embedded during production to enable quality traceability; and after delivery, regular inspection services are provided for up to 15 years, including surface carbonation depth testing and anchoring system stress monitoring. This closed-loop model of "prevention-monitoring-maintenance" has enabled projects undertaken by Qinglong, such as the Dongguan Women and Children's Activity Center, to show no structural damage within a 10-year service period, with durability indicators remaining above 90% of their initial state.

From the microscopic optimization of material formulas to the macro-level control of engineering practice, Qinglong has always been grounded in scientific data and driven by technological innovation. In the UHPC/GRC/GRG/GRP materials field, only by carrying the concept of durability throughout the entire industry chain can we truly fulfill the corporate mission of "creating beautiful buildings" and provide customers with architectural decorative systems that combine aesthetic value with long-term safety assurance.