Analysis of Splicing Accuracy Requirements and Key Construction Control Points for Curved GRC Shapes

The precise joining of curved GRC shapes is a perfect fusion of architectural aesthetics and engineering precision, and also a dual test of material performance and construction technology.

In contemporary architectural design, curved GRC has become an important material for shaping a building's unique aesthetics thanks to its excellent formability. However, the joining precision of curved GRC shapes directly affects the overall visual effect and structural safety of a building, and its construction control has long been a core challenge in the industry. As an industry leader with 28 years of deep expertise in the UHPC/GRC/GRG/GRP materials field, Qinglong Group leverages its full-chain technical advantages to thoroughly analyze the joining precision requirements and construction control essentials of curved GRC shapes, providing professional solutions for designers and owners.

Core Technical Indicators for the Joining Precision of Curved GRC Shapes

The joining precision of curved GRC shapes must be strictly controlled in three aspects: three-dimensional spatial coordinates, joint width, and surface flatness. According to the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), the geometric dimensional deviation of a single curved GRC component should be controlled within ±3mm, the permissible deviation of joint width is ±1mm, and the surface flatness error must be ≤2mm/m. For double-curved or special-shaped components, millimeter-level precision calibration must also be achieved through 3D scanning technology to ensure a curvature radius matching rate of ≥99% between adjacent components. Curved GRC components produced by Qinglong Group, relying on the mould table positioning system developed by its provincial-level engineering technology center, can achieve a machining precision of ±0.5mm, laying a solid foundation for on-site joining.

Key Points of Full-Process Construction Control for Curved GRC

Construction control for curved GRC must run through the entire process of design development, production, and on-site installation. In the design phase, BIM technology is used to build parametric models, and tools such as Grasshopper are employed for joint simulation analysis to preemptively avoid joining conflicts caused by curvature changes. During production, Qinglong Group adopts an automated spraying and forming process to ensure uniform fiber distribution in components and controls shrinkage deformation through steam curing. During on-site installation, 3D laser scanning technology is used for real-time positioning, combined with customized adjustable supports to achieve six-degree-of-freedom fine adjustment, while special elastic sealant is used to fill the joints, addressing both waterproofing and deformation compensation needs. In a landmark project, the Qinglong team achieved seamless joining of a double-curved GRC roof 50 meters in diameter using this process, with joint errors controlled within 0.8mm, earning high recognition from the owner.

Qinglong Group's Technical Advantages and Industry Value

As a national high-tech enterprise and a drafting unit of GRC industry standards, Qinglong Group has translated its 28 years of full-chain experience into precision control solutions for curved GRC shapes. From material formulation optimization (flexural strength exceeding 20MPa) to construction method innovation, it has formed a closed-loop system covering "design-production-installation-maintenance". Projects it participated in building, such as the Century Plaza renovation project on Nanjing East Road, have won industry innovation awards for their outstanding curved GRC joining precision. Going forward, Qinglong will continue to fulfill its mission of "creating beautiful architecture", driving application breakthroughs of curved GRC in the high-end building sector through technological innovation and providing more reliable material solutions for designers to realize their creative visions.

Controlling the joining precision of curved GRC shapes is both a challenge to engineering technology and a pursuit of architectural aesthetics. With rigorous process standards and full-chain service capabilities, Qinglong Group safeguards the precise realization of every curved shape, allowing architectural art to radiate its unique charm in the balance between precision and beauty.