Why Free-Form Curved GRC Panels Cannot Use Traditional Wood Molds: Causes and Solutions

In the field of contemporary architectural design, curved aesthetics has become an important form of expression for showcasing a building's individuality and artistic value. As a seasoned player in the field of Glass Fiber Reinforced Concrete (GRC), we have found that traditional wooden molds face numerous technical bottlenecks in the production of complex curved GRC panels. This article provides an in-depth analysis of the limitations of using traditional wooden molds for curved GRC panels, and explores industrialized production solutions drawing on Qinglong's 28 years of full-chain experience.

Traditional wooden molds once played an important role in the production of flat or simply shaped GRC components, but their material properties and process logic are ill-suited to the production needs of curved components. From the perspective of the material itself, wood has poor physical stability and is prone to deformation under curved stress conditions, resulting in mold precision deviations exceeding the industry standard of 3mm/m. Data from a landmark project shows that the joint error of hyperbolic curved GRC panels made with wooden molds reached up to 8mm during installation, far exceeding regulatory requirements. In addition, wood's waterproofing performance is insufficient; it tends to absorb water and expand during the GRC slurry curing process, distorting the component's surface texture—a fatal flaw for high-end projects pursuing refined finish effects.

The digital production revolution for curved GRC panels requires a full-chain upgrade spanning mold technology, material processes, and installation systems. As a National High-Tech Enterprise, Qinglong has built a precise transformation system from digital models to physical components by introducing 3D scanning technology and a parametric design platform. In mold craftsmanship, glass fiber reinforced plastic (GRP) composite molds are used to replace traditional wood, offering an elastic modulus of up to 25GPa, forming precision controlled within ±0.5mm/m, and reusability of more than 50 times, greatly reducing the per-unit mold cost. In a cultural center project, 1,200 hyperbolic curved GRC panels produced with GRP molds achieved a first-pass installation qualification rate of 98.7%, a 37% efficiency improvement over the wooden mold process.

The application of new mold technology not only solves the forming precision problem but also drives the optimization of GRC material performance. Qinglong's independently developed low-alkalinity GRC formulation maintains a flexural strength of ≥18MPa while reducing the hydration heat peak by 23%; combined with the thermal conductivity of GRP molds, the curing cycle for curved components is shortened to 60% of that of the traditional process. In the Nanjing East Road Century Plaza renovation project, UHPC and GRC composite curved components were used, achieving seamless integration of translucent concrete and GRC through digital molds. The project won the Silver Award of the AALBORG WHITE Cup UHPC Construction Engineering Innovation Award. For more industry information: +WeChat qlfsbl123

The industrialized production of curved GRC panels is an inevitable trend of integrating material technology with digital technology. As a contributing editorial unit of the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC), Qinglong is providing designers with full-process services from design development to finished product delivery through the "digital mold + intelligent production" model. Whether it is the hyperbolic curtain walls of grand theaters or the irregular shading systems of commercial complexes, Qinglong's GRP mold technology and UHPC/GRC composite processes can achieve a perfect balance between architectural creativity and engineering implementation—this is the best practice of our mission to "Create Beautiful Architecture".