How Large UHPC Panels Achieve Continuous Stone Grain Surface Effects: Technical Principles and Process Practice

In the field of architectural decoration, the texture and aesthetic expression of materials have always been a core concern for designers and owners. Large UHPC panels, with their ultra-high strength and durability, are becoming the ideal choice for high-end building envelopes, and achieving continuous stone-grain effects on their surfaces is a key indicator of material craftsmanship. As an industry leader with 28 years of dedication to UHPC/GRC/GRG/GRP materials, Qinglong Group has perfectly fused industrial prefabrication with natural textures through full-chain technological innovation, endowing building envelopes with visual tension comparable to natural stone.

### The Technical Principle of UHPC Stone-Grain Effects: A Dual Breakthrough in Materials Science and Texture Replication

The realization of continuous stone-grain effects is essentially a synergistic innovation of material performance and mold craftsmanship. UHPC (Ultra-High Performance Concrete), with its extremely low water-binder ratio and fiber reinforcement system, provides the foundation for texture replication—its dense microstructure can precisely capture every texture detail on the mold surface. Qinglong Group optimized the ratio of nano-grade silica fume and ultra-fine steel fibers, increasing the fluidity of the UHPC matrix by 40% to ensure complete filling of stone-grain details. Meanwhile, 3D scanning technology is used to digitally capture natural stone surfaces, converting millimeter-level texture undulations into high-precision mold data. CNC engraving technology is then employed to produce silicone molds with three-dimensional relief, ultimately achieving precise “one mold, one pattern” replication.

### Craftsmanship in Practice: Full-Process Control from Mold Development to Finished Product Installation

In the production and manufacturing stage, Qinglong established a standardized process of “texture presetting – material injection – curing and forming.” During mold surface treatment, a composite coating of imported release agent and texture fixing agent is applied, which both ensures the clarity of the stone grain and prevents texture damage during demolding. During pouring, vacuum vibration is used to remove air bubbles, ensuring 100% conformity between the UHPC slurry and the mold texture. To address the texture continuity challenge of large panels (each up to 12㎡ in area), Qinglong developed a modular mold joining technology that achieves seamless connection between adjacent molds through mortise-and-tenon structures, allowing the stone grain to extend naturally across panel joints and solving the texture breakage problems common in traditional processes.

### Engineering Validation: Aesthetic Realization from Landmark Buildings to Commercial Spaces

As a national high-tech enterprise, Qinglong's stone-grain UHPC panels have been successfully applied in multiple benchmark projects. In a cultural and arts center project in a provincial capital city, 5000㎡ of exterior walls feature UHPC panels imitating the texture of Kalamaili Gold stone; by adjusting the mold angle and surface roughness, the color variation effects of the stone under different lighting conditions were achieved. In the renovation project of Century Plaza on Nanjing East Road, the application of translucent stone-grain UHPC panels combined natural texture with the art of light and shadow, becoming a finishing touch in urban renewal. The implementation of these projects confirms Qinglong's full-chain technical strength in UHPC material detailed design, production and manufacturing, through to construction and installation.

### Industry Value: Redefining the Aesthetic and Functional Boundaries of Building Envelopes

The promotion of continuous stone-grain UHPC panels not only provides designers with a more flexible vehicle for aesthetic expression, but also reduces structural loads and installation risks with a weight 60% lighter than natural stone and strength exceeding that of C100 concrete. As a participating drafter of the industry standard “General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC),” Qinglong Group is expanding the application boundaries of UHPC materials in architectural decoration through technological innovation. In the future, with the integration of parametric design and intelligent construction technology, the degree of customization of stone-grain effects will be further enhanced, injecting more possibilities into the mission of “creating aesthetically beautiful architecture.”

From micron-level optimization of material formulations to millimeter-level precision in engineering practice, Qinglong has drawn on 28 years of industry experience to transform the technical advantages of UHPC into a direct expression of architectural aesthetics. In the arena of new architectural decoration materials, this “technology + art” innovation model not only sets an industry benchmark, but also provides designers and owners with an integrated solution that balances performance, cost, and aesthetics.