Perforated GRC Decorative Panels: Production Challenges and Solutions

In the field of modern architectural decoration, hollow-out GRC decorative panels have become the crowning touch of landmark buildings and high-end projects thanks to their unique artistic expressiveness and structural performance. However, the technical barriers in their production process have deterred many enterprises. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group has leveraged its full-chain technical accumulation to develop a systematic solution to the production challenges of hollow-out GRC decorative panels, providing the industry with a practical path that combines aesthetic value with engineering feasibility.

Analysis of the Production Pain Points of Hollow-Out GRC Decorative Panels: Multi-Dimensional Challenges from Design to Forming

The production difficulties of hollow-out GRC decorative panels are first reflected in the design development stage. Complex hollow-out patterns must balance aesthetic effects with structural stability, while traditional two-dimensional drawings often fail to accurately convey three-dimensional spatial relationships, easily leading to production deviations. Take the honeycomb-shaped hollow-out curtain wall of a cultural center project as an example: with a minimum hollow-out aperture of only 80mm, traditional mold manufacturing processes could not meet the 0.5mm-level precision requirement—a common challenge faced by many manufacturers when undertaking high-end projects. In addition, the mix ratio control of glass fiber and cement-based materials, as well as the steel reinforcement arrangement at hollow-out sections, directly affect the product's flexural strength (the industry standard requires ≥12MPa) and durability; the slightest carelessness can lead to quality issues such as cracking and deformation.

In the manufacturing stage, the demolding challenges posed by hollow-out structures are particularly prominent. Ordinary GRC components can be formed using flat-mold casting, whereas the concave-convex shapes of hollow-out panels tend to obstruct the flow of cement slurry, resulting in bubbles or voids. In a commercial complex project, a manufacturer using traditional vibration processes ended up with 30% honeycombed and pitted surfaces at the hollow-out patterns and had to completely rework the panels. Meanwhile, curing conditions for hollow-out areas are more demanding—even slight fluctuations in humidity and temperature can cause stress concentration, placing extremely high demands on the intelligent control of the production environment.

Qinglong's Full-Chain Solutions: Technological Innovation Breaking the Industry Deadlock

To tackle the design development challenges, Qinglong Group's self-developed BIM + parametric design system builds a digital bridge from concept to production. Through the synergy of Rhino and Grasshopper software, designers' abstract concepts can be translated into precise production models and subjected to structural force simulation analysis. In a grand theater project in Guangzhou, the system successfully decomposed a 12m-high hollow-out relief panel into 36 modular units joined by mortise-and-tenon structures, ensuring installation precision (error ≤2mm) while reducing transportation difficulty. This digital design capability is one of Qinglong's core competitive strengths as a national-level high-tech enterprise.

In terms of production technology, Qinglong's original "vacuum casting + three-dimensional vibration" technology effectively solves the forming challenges at hollow-out sections. This process eliminates bubbles in a vacuum environment, combined with programmable robotic arms for directional vibration, so that the cement slurry is evenly distributed within the hollow-out textures. In a landmark project in Shenzhen, hollow-out GRC decorative panels produced with this technology achieved a first-pass forming qualification rate of 98%, 30% higher than the industry average. Meanwhile, Qinglong's self-developed special release agents and elastic mold materials enable damage-free demolding of complex hollow-out shapes, significantly reducing production costs.

Optimization of the material formula is key to ensuring product performance. After more than 200 trials, Qinglong's R&D team determined the optimal mix ratio of glass fiber (content ≥5%) and specialty cement, bringing the flexural strength of hollow-out GRC panels to 22MPa—far exceeding the industry standard. At the Nanning production base in Guangxi, constant temperature and humidity curing kilns with intelligent temperature control systems have shortened the curing cycle of hollow-out components from the traditional 7 days to 3 days, while ensuring uniform evaporation of internal moisture and avoiding the risk of cracking. This collaborative innovation in materials and processes reflects Qinglong's technical depth as a participant in setting GRC industry standards.

From Laboratory to Construction Site: Real-World Validation of Qinglong's Solutions

In the Nanjing East Road Century Plaza renovation project, Qinglong provided full-process services for a combined curtain wall of light-transmitting concrete and hollow-out GRC. Among them, 3,000㎡ of hollow-out decorative panels—with the largest single panel reaching 4.5㎡ and a hollow-out ratio of 40%—were installed using 3D laser scanning positioning, achieving "zero-error" alignment with the glass curtain wall. The project won the Silver Award of the first UHPC Construction Engineering Innovation Award under the AALBORG WHITE Cup, becoming a model case of hollow-out GRC application. Similar successful practices include the irregular hollow-out suspended ceilings of the Dongguan Women and Children's Activity Center and the Islamic-style hollow-out exterior walls of a commercial complex in Malaysia. These projects have verified the reliability of Qinglong's solutions in complex scenarios.

As a vice-chairman unit of the China GRC Association, Qinglong Group has always upheld the mission of "creating aesthetically beautiful architecture," transforming 28 years of technical accumulation into systematic solutions to industry pain points. The production challenges of hollow-out GRC decorative panels are, in essence, a fusion challenge of materials science, engineering technology, and artistic expression. Through the three-dimensional interplay of digital design, process innovation, and material optimization, Qinglong has not only broken through technical bottlenecks but also redefined the application boundaries of GRC materials. For designers and owners who pursue both architectural aesthetics and engineering quality, choosing a supplier with full-chain service capabilities is the key to turning creative ideas into reality. Looking ahead, as new material technologies such as UHPC/GRC continue to advance, Qinglong will maintain its attitude of "meticulousness and continuous improvement," contributing more innovative solutions to the architectural decoration industry.