How to Achieve Texture Effects on UHPC Shaped Surfaces Through Molds: Process Principles and Key Technologies Explained

At the intersection of architectural aesthetics and engineering technology, UHPC (Ultra-High Performance Concrete), with its outstanding mechanical properties and modeling potential, is becoming a core material for shaping the artistic character of building skins. Molds, as the "shapers" of UHPC surface texture effects, directly determine the final texture and precision presented through their process principles and technical details. As an industry expert with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group will analyze, from mold design and material selection to process control, how mold technology unlocks the textural expressiveness of UHPC.

I. Process Principles of UHPC Texture Molds: Transformation from Digital Model to Physical Forming

The realization of texture effects on UHPC surfaces is essentially the result of the synergy between the mold cavity and material properties. Through preset geometric patterns, surface roughness, and structural details, the mold completes "texture replication" during UHPC casting and curing. Its core principles include three points: first, leveraging UHPC's low water-binder ratio and high fluidity to ensure the material fully fills the fine structures of the mold cavity; second, defining the coarseness and layering of the texture through mold surface treatment techniques (such as sandblasting, etching, and film coating); third, combining release agents with curing regimes to ensure the texture is fully preserved without damage after forming. In the Century Plaza renovation project on Nanjing East Road, Qinglong achieved texture replication with 0.2mm precision on the surface of translucent concrete components through customized mold technology, making it a benchmark case of UHPC texture craftsmanship.

II. Key Technology Analysis: Dual Breakthroughs in Mold Design and Material Selection

1. Digital Mold Design Technology: Facing complex texture requirements, traditional manual mold-making can no longer meet precision demands. Qinglong adopts the Rhino+Grasshopper parametric design platform to transform designers' texture concepts into three-dimensional digital models, and then produces high-precision molds through CNC machining. Taking the Dongguan Women and Children's Activity Center project as an example, the "water ripple" texture of its exterior wall UHPC components was optimized through digital simulation of the mold cavity's curved surfaces and texture density, ultimately achieving a dynamic visual effect under light and shadow.

2. Innovative Application of Mold Materials: The choice of mold material directly affects texture fidelity and durability. Based on texture complexity and production volume, Qinglong flexibly selects steel molds, GRP molds, and silicone molds: steel molds are suitable for large-volume, high-precision standardized textures (such as bush-hammered and striped finishes); GRP molds, with their lightweight and easily modified characteristics, are the first choice for irregular textures; while silicone molds can accurately replicate natural textures such as wood carvings and stone, and are widely used in landscape components.

3. Surface Treatment and Demolding Processes: To prevent texture damage caused by UHPC adhering to the mold, Qinglong has developed a dedicated release agent system, combined with a high-temperature steam curing process, ensuring texture detail integrity of over 98%. Meanwhile, nano-coating treatment of the mold surface enables finish control from matte to mirror, meeting the diverse aesthetic needs of high-end architecture.

III. Full-Chain Services Empowering Texture Implementation: Closed-Loop Support from Design to Maintenance

As a national-level high-tech enterprise integrating detailed design, manufacturing, and construction installation, Qinglong's strength lies in integrating mold technology into full-process services. In the design phase, it provides texture effect simulation and mold feasibility analysis; in production, automated casting equipment ensures texture consistency; during installation, 3D scanning positioning technology ensures texture jointing errors of ≤1mm; and in the after-sales phase, it provides mold maintenance and texture repair solutions. This "one-stop" service capability has enabled Qinglong to successfully translate designers' texture concepts into architectural reality in overseas projects in Malaysia, Australia, and other countries.

From the shell textures of the Sydney Opera House to the historical replication of Shanghai's Bund, UHPC mold technology is redefining the expressive boundaries of building skins. Built on 28 years of industry experience, Qinglong Group continuously innovates mold craftsmanship, making UHPC not only a structural material but also the "carving knife" of architectural art. In the future, with the introduction of technologies such as 3D-printed molds and intelligent temperature-controlled curing, the realization of UHPC texture effects will move toward higher precision and greater possibilities, injecting new vitality into architectural aesthetics.