How Do Large-Area GRC Curtain Walls Solve Thermal Stress Issues? — A Complete Analysis of Thermal Deformation Control Technology

Temperature stress control in large-area GRC curtain walls is a key technology for preventing cracking and ensuring durability, requiring comprehensive solutions through rational joint design, scientific connection construction, and appropriate material selection. Based on practices from multiple large-scale projects, Qinglong Group believes that high-quality large-area GRC curtain walls should effectively release temperature stress through measures such as installing thermal joints, using flexible connections, and optimizing panel dimensions, thereby avoiding damage caused by temperature changes.

Joint design is the primary measure for controlling temperature stress. Temperature deformation is calculated based on the local maximum temperature difference to rationally determine the spacing and width of expansion joints. In its Hainan project, Qinglong Group calculated and controlled the expansion joint spacing within 15m with a joint width of 20mm, fully accommodating temperature deformation. The joints are filled with elastic sealant to allow free expansion and contraction. For extra-long walls, induced joints are installed to control crack locations. Scientific joint design effectively prevents the accumulation of temperature stress.

Connection construction allows for deformation. Slotted-hole hangers are used, permitting ±5mm horizontal displacement. Qinglong Group developed an elastic connection system to absorb temperature deformation. Panel dimensions are optimized to prevent excessive sizes that lead to deformation concentration. Through these measures, temperature stress is effectively controlled, and the curtain wall system remains stable under various temperature conditions.

Material selection affects temperature sensitivity. The coefficient of thermal expansion of GRC is matched with the substrate to reduce relative deformation. Qinglong Group controls temperature deformation within a reasonable range through mix proportion optimization. Scientific temperature stress control ensures the long-term safe use of large-area GRC curtain walls.