What Are the Production Difficulties of Hollow-Out GRC Decorative Panels? Breakthrough Solutions and Process Optimization

Openwork GRC decorative panels are widely used in high-end buildings for their unique shapes and strong decorative appeal, but the openwork structure greatly increases production difficulty, with problems such as cracking, deformation, and damage to openwork edges prone to occurring. Identifying the core production challenges and taking targeted optimization measures is key to ensuring product quality. Drawing on experience from openwork projects such as the Nanning Liyuan Hotel, Qinglong analyzes the breakthrough solutions.

I. Core Production Challenges of Openwork GRC Decorative Panels

Production challenges center on structural stability and forming precision. Stress concentration in openwork areas makes them prone to cracking during production or use; especially when the openwork ratio exceeds 50%, component strength drops sharply. Qinglong's test data show that as the openwork ratio increased from 30% to 50%, the flexural strength of components dropped by more than 30%. Forming is difficult, as complex openwork patterns require precise control of mold accuracy, and openwork edges are prone to chipping and burrs. During casting, the slurry has difficulty filling openwork areas, easily producing air bubbles and voids that affect compactness. Improper curing can easily cause uneven shrinkage in openwork areas and lead to deformation—for example, in the early stage of the Sanya Festival Plaza project, improper curing caused slight deformation in some openwork components.

II. Key Technical Measures for Overcoming Challenges

Production challenges are resolved through material and process optimization. In terms of materials, high-grade cement and fine aggregates are selected, and high-efficiency water reducers are added to improve slurry fluidity, ensuring full filling of openwork areas; double-layer alkali-resistant mesh fabric is used for reinforcement, and steel bars are added at openwork edges to enhance structural stability—with this solution, the colored openwork panels of the Nanning Liyuan Hotel maintained good strength at a 50% openwork ratio. High-precision steel molds are used, with detachable modules set at openwork areas to facilitate demolding and forming, while a dedicated release agent is applied to the mold surface to reduce damage to openwork edges.

III. Refined Optimization Plan for Production Processes

Refined processes are the core of ensuring openwork quality. Casting adopts the "layered casting + high-pressure vibration" method, with each layer ≤50mm thick and vibration pressure ≥0.3MPa, ensuring dense, bubble-free slurry; hand grouting is applied to openwork edges to prevent slurry shortage and chipping. Curing adopts a combined "constant temperature and humidity + steam curing" scheme, with curing temperature controlled at 20-25℃, humidity ≥90%, and the curing period extended to 14 days to reduce shrinkage deformation. A five-axis engraving machine is used for post-production finishing to remove burrs on openwork edges and improve precision—in the Guangzhou Dongzhu Shangdu Commercial City project, Qinglong achieved openwork edge precision error ≤0.5mm through this process.

IV. Quality Control and Testing Essentials

Strict quality control ensures openwork components meet quality standards. During production, focus is placed on checking the filling of openwork areas, with ultrasonic testing used to detect internal compactness—the void rate must be ≤3%; finished products are tested for the verticality and flatness of openwork edges, with error ≤1mm/m; load tests are conducted to ensure openwork components show no cracking or deformation under design loads; a traceability system is established to record production parameters and test results for each component. Through full-process quality control, Qinglong has achieved a factory pass rate of over 99% for openwork GRC decorative panels, successfully overcoming the production challenges of complex openwork.