How Texture Effects on UHPC Shaped Surfaces Are Achieved Through Molds: Analysis of Process Principles and Key Technologies

The presentation of architectural aesthetics often lies hidden within fine textures. As an industry player with 28 years of full-chain experience in the UHPC/GRC/GRG/GRP materials field, Qinglong Group deeply understands the decisive role of mold craftsmanship in the textural effects of shaped surfaces. This article analyzes, from the perspectives of process principles and key technologies, how molds are used to achieve the textural quality of UHPC shaped surfaces, providing a professional reference for designers and owners.

### Process Principles of UHPC Texture Molds: The Synergy of Material Properties and Mold Design UHPC (Ultra-High Performance Concrete), with its ultra-high strength and excellent durability, has become an ideal material for high-end architectural decoration, while the presentation of its surface textures relies on the precise shaping of molds. As the “negative-form” carrier for UHPC shaping, a mold must simultaneously meet three core requirements: compatibility with material fluidity, faithful reproduction of texture details, and reusability. During the detailed design stage, Qinglong selects the mold base material according to texture complexity (such as imitation stone lychee finish, water ripple patterns, and geometric relief). Commonly used steel molds are suitable for high-precision repetitive textures, while silicone molds excel at replicating complex curved surfaces and delicate textures—a technical solution already validated in the light-transmitting concrete project of the Century Plaza renovation on Nanjing East Road.

### Key Technologies for Texture Realization: Full-Process Control from Design to Forming **1. Digital Texture Design and Mold Machining** Supported by the technical strength of Qinglong's provincial-level R&D center, parametric design software such as Rhino and Grasshopper converts designers' texture concepts into precise digital models. CNC engraving technology is used to machine the mold base material, keeping texture depth deviation within ±0.2mm—a precision standard that meets the industry requirements of the “General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC)” (Plan No. 2024-0232T-JC).

**2. Mold Surface Treatment and Demolding Technology** The smoothness of the mold surface directly affects the clarity of UHPC textures. Qinglong uses imported release agents and nano-scale surface treatment processes to ensure faithful texture reproduction while preventing surface damage during demolding. For complex textures (such as openwork carving), an innovative segmented mold design is adopted, with mortise-and-tenon joints achieving seamless texture transitions. This technology was successfully applied in the Dongguan Women and Children's Activity Center project, winning the Silver Award of the AALBORG WHITE Cup GRC Construction Engineering Innovation Award.

**3. Material Mix Proportion and Casting Process Optimization** The fluidity and aggregate gradation of UHPC materials are key to texture formation. Drawing on 28 years of formulation R&D experience, Qinglong adjusts the steel fiber content and ultra-fine powder ratios to achieve “zero-bubble” filling of the material in the mold, ensuring that even fine textures below 0.1mm are fully presented. During casting, vacuum vibration and gradient pressurization technologies are employed to further enhance the fullness and three-dimensionality of the textures.

### Qinglong's Full-Chain Service: From Texture Design to Project Delivery As a national high-tech enterprise and a participant in the development of UHPC/GRC industry standards, Qinglong not only provides mold process solutions but also ensures the consistency of texture effects from drawings to reality through full-chain services covering detailed design, manufacturing, and construction installation. For example, in overseas projects, the selection of mold materials suited to different climates (such as UV-resistant silicone molds in tropical regions) and 3D laser scanning positioning at the installation stage both reflect the accumulated expertise of a professional service provider.

Texture is the “expression” of UHPC architecture, and the mold is the “brush” that shapes this expression. Building on 28 years of industry experience, Qinglong uses digital design, precision manufacturing, and full-process control to make every texture a finishing touch of architectural aesthetics. Going forward, we will continue to explore the boundaries of mold technology and material performance, offering designers greater creative freedom and creating architectural works that combine artistry and durability for owners.