How Do Large-Area GRC Curtain Walls Solve Thermal Stress Problems?

In contemporary architectural design, large-area GRC curtain walls have become the preferred decorative material for landmark buildings and high-end public projects thanks to their excellent sculptural expressiveness and durability. However, the material stress caused by temperature variations has always been a core challenge in engineering practice. As an industry-leading enterprise with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group has developed a systematic thermal stress solution through the coordinated optimization of detailed design, material innovation, and construction technology, providing reliable technical support for designers and owners.

I. Causes and Hazards of Thermal Stress in GRC Curtain Walls
As a composite material, GRC (glass fiber reinforced concrete) is prone to internal stress within its components due to the difference in thermal expansion coefficients between its cement-based matrix and glass fibers under temperature changes, as well as the restraint conditions of the curtain wall structure itself. When thermal stress exceeds the ultimate strength of the material, it may cause cracking, deformation, or even failure of the anchoring system, directly affecting the building's safety and aesthetics. Especially in regions with significant temperature differences or in super high-rise buildings, controlling thermal stress has become a key issue in GRC curtain wall design.

II. Material Optimization: Enhancing GRC Crack Resistance at the Source
Through refined development of material formulations, Qinglong Group fundamentally enhances the thermal stress resistance of GRC components. By adopting an optimized ratio of low-alkali cement and alkali-resistant glass fibers, combined with mineral admixtures and specialized additives, the linear expansion coefficient of GRC material is controlled below 8×10^-6/℃, while flexural strength is increased to over 20MPa and fracture toughness is improved by 30% compared with traditional formulations. In addition, customized material elastic modulus parameters are provided for projects in different climate zones to ensure structural stability under extreme temperature differences. For more industry information: WeChat qlfsbl123

III. Structural Design: Innovative Solutions for Dynamic Stress Release
During the detailed design stage, Qinglong introduces BIM technology and parametric analysis tools to establish thermal field simulation models that accurately predict stress distribution under various working conditions. Stress release is achieved through three core technologies: first, flexible connection joint design, with elastic pads installed between components and the main structure to allow ±30mm of longitudinal displacement; second, optimized joint spacing, dividing large-area curtain walls into independent units of ≤15㎡ based on calculation results, with reserved 10-15mm expansion joints to absorb thermal deformation; third, the innovative application of curved gradient shapes, using the plasticity of GRC material to achieve gradient changes in component stiffness and avoid stress concentration.

IV. Construction Technology: Quality Assurance Through Full-Process Control
Qinglong's full-chain service system further strengthens thermal stress control during the construction phase. In the factory prefabrication stage, a process combining steam curing and natural curing is adopted to ensure that more than 80% of shrinkage deformation is completed before components leave the factory; during on-site installation, 3D laser positioning technology is used to control errors within ±2mm, avoiding additional stress caused by forced installation; for construction in hot or severely cold seasons, special temperature control measures are formulated, such as pre-cooling the substrate during summer construction and pre-heating anchoring components in winter.

V. Industry Practice: Technical Expertise Built on 28 Years of Experience
As a participating unit in drafting the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), Qinglong has validated the effectiveness of its thermal stress solutions in hundreds of large-scale projects. From the hyperbolic GRC curtain wall of the Nanning ASEAN Culture and Arts Center to the extra-long, large-span GRC sunshade system of a commercial complex in Nanjing, all have achieved excellent performance with zero cracking and zero maintenance. By integrating the full-chain advantages of detailed design, manufacturing, and construction installation, Qinglong is driving GRC curtain wall technology toward more complex and extreme application scenarios. For more industry information: WeChat qlfsbl123

As building envelope design continues to break new ground, thermal stress control of GRC curtain walls has evolved from a single technical issue into a systematic engineering endeavor. With the mission of "Creating Beautiful Architecture," Qinglong Group will continue to deeply integrate material innovation, digital design, and lean construction to provide the industry with safe, reliable, and aesthetically valuable GRC application solutions, helping designers realize bold and imaginative creative concepts and delivering enduring architectural works for owners.