Solutions and Engineering Practice for Thermal Stress in Large-Area GRC Curtain Walls

Solving the Thermal Stress Challenge: Qinglong GRC Curtain Wall Builds Architectural Safety and Aesthetics through Technological Innovation

As modern building envelope design evolves toward complexity and personalization, large-area GRC curtain walls, with advantages such as high design freedom and rich textures, have become a key choice for landmark buildings. However, the shrinkage and expansion of glass fiber reinforced concrete (GRC) materials caused by temperature changes can easily lead to curtain wall cracking, deformation, and other problems, seriously affecting building safety and durability. As an industry leader with 28 years of deep expertise in the UHPC/GRC/GRG/GRP materials field, Qinglong Group, supported by full-chain technical strength—from material R&D and structural optimization to construction control—has built a systematic thermal stress solution, with its technical reliability verified in hundreds of projects across the country.

I. Causes of Thermal Stress in GRC Curtain Walls and Industry Pain Points

GRC material is composed of cement-based cementitious materials and glass fibers, with a thermal expansion coefficient of approximately 10×10⁻⁶/°C. Under outdoor temperature variations from -30°C to 70°C, curtain wall panels undergo significant thermal deformation. When deformation is constrained by the structure, internal stress accumulates continuously, easily triggering panel cracking, anchoring system failure, and other problems. A commercial complex project once failed to fully account for thermal stress, resulting in extensive panel crazing within six months of completion, with rework costs as high as millions of yuan. The industry currently faces three major challenges: insufficient stability of material performance, lack of targeted joint design, and a disconnect between construction techniques and theoretical models.

II. Four Core Technologies of Qinglong GRC Curtain Wall Thermal Stress Control

Leveraging its R&D strength as a National High-Tech Enterprise, Qinglong Group has broken through technical bottlenecks across three dimensions: materials, design, and construction. At the material level, by incorporating nano-scale mineral admixtures and modified fibers, the dry shrinkage rate of GRC is controlled within 0.03% and the elastic modulus is increased by 20%, significantly enhancing the material's crack resistance; at the structural design stage, BIM technology is used to simulate the annual temperature field distribution, and an innovative "flexible connection + staged release" joint system has been developed, allowing individual panels a thermal displacement of ±3mm; in construction, 3D laser scanning positioning technology is introduced to ensure installation errors of ≤2mm, avoiding additional stress caused by forced assembly. These technologies have been successfully applied in benchmark projects such as the Nanjing East Road Century Plaza renovation project, achieving zero-leakage and zero-cracking operation of the curtain wall system.

III. Full Lifecycle Management: A Closed-Loop Guarantee from Detailed Design to After-Sales Maintenance

As a professional manufacturer integrating detailed design, production, construction and installation, and after-sales maintenance, Qinglong Group has established a thermal stress control mechanism covering the entire project lifecycle. At the design stage, customized calculation reports are provided, specifying material selection schemes for different climate zones; in production, automated assembly lines ensure curing temperature and humidity deviations of ≤±2°C; during installation, the "temperature window construction method" is implemented, with critical joint work carried out when the ambient temperature is close to the annual average; in the after-sales phase, an IoT monitoring system tracks curtain wall thermal deformation data in real time and provides preventive maintenance plans. This full-chain service model has enabled Qinglong GRC curtain walls to achieve a 15-year maintenance-free record in projects such as the Dongguan Women and Children's Activity Center.

From participating in the formulation of the Technical Standard for Application of Glass Fiber Reinforced Cement (GRC) in Building Engineering (JGJ/T423-2018) to winning the AALBORG WHITE Cup GRC Construction Engineering Innovation Award, Qinglong Group has always driven industry progress through technological innovation. Facing the thermal stress challenge of large-area GRC curtain walls, Qinglong will continue to uphold its values of "honesty, striving, trust, and collaboration," providing designers and owners with expert solutions from concept to completion, so that every building can maintain the balance of safety and beauty through the test of time. Choose Qinglong GRC—choose a building envelope system that stands the test of temperature.