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

The mold is the "soul engineer" of UHPC sculptural art; the precision and beauty of textures begin with millimeter-level mold craftsmanship.

In the field of architectural decoration, UHPC (Ultra-High Performance Concrete), with its ultra-high strength, excellent durability, and outstanding sculptural capability, has become the material of choice for the facade decoration of landmark buildings and high-end commercial complexes. The texture effects on UHPC surfaces—whether the delicate grain of imitation stone, the cool texture of metal, or artistic custom patterns—all depend on precise realization through mold craftsmanship. As an industry leader with 28 years of experience in detailed design and production of UHPC/GRC/GRG/GRP materials, Qinglong Group understands that mold technology is the core factor determining UHPC surface effects; its process principles and key technologies directly impact the aesthetic presentation and engineering quality of projects.

I. Process Principles of UHPC Texture Molds: The "Replication Code" from Design to Forming

The realization of textures on UHPC sculptural surfaces is essentially a process of "reverse replication" of design forms by the mold. As the "first contact surface" of UHPC components, the mold must transfer texture information from the digital model to the concrete material through a physical carrier. Its core principle lies in using the raised and recessed structures and material properties of the mold surface to form reverse textures during UHPC casting and curing. For example, wood-grain imitating UHPC panels must be pressed by molds with wood-grain textures, so that the concrete presents pattern details exactly matching the mold after solidification. During the detailed design stage, Qinglong Group selects mold types according to project requirements—steel molds are suitable for high-precision repetitive textures, silicone molds for complex curved surfaces and delicate grains, while wooden molds are often used for customized artistic textures, realizing design intent through the matching of materials and processes.

II. Key Technologies of UHPC Molds: The Balancing Art of Precision, Durability, and Cost

1. Digital Modeling and Mold Machining Precision Control: Modern UHPC texture molds rely on parametric design and CNC machining technology. Qinglong Group uses 3D design software such as Rhino and Grasshopper to build digital texture models, and achieves 0.1mm-level precision engraving on mold surfaces through five-axis machining centers, ensuring accurate reproduction of texture details (such as 0.5mm-deep stone pores and 3mm-wide metal brushing). Taking the translucent concrete project at Century Plaza on East Nanjing Road as an example, its surface gradient textures were divided into modules using BIM technology, with mold machining errors controlled within ±0.5mm, ultimately achieving a flowing visual effect under light and shadow.

2. Mold Materials and Surface Treatment Technology: The choice of mold material directly affects texture clarity and service life. Qinglong Group has developed specialized mold materials for different texture requirements: chrome-plated steel molds achieve a surface finish of Ra0.8μm, suitable for mirror-effect UHPC components; silicone molds use high-elasticity food-grade silicone, capable of perfectly replicating delicate textures of 200 mesh or finer; and for super-large components (such as 10m-long UHPC sunshades), innovative steel-wood composite molds are adopted, balancing strength and texture expressiveness. Meanwhile, mold surfaces require release agent coating treatment to prevent texture damage caused by adhesion of UHPC slurry.

3. Production Process and Texture Consistency Assurance: During UHPC casting, mold stability and vibration techniques are crucial. Qinglong Group controls deformation through mold pre-tensioning devices and adopts low-frequency vibration technology (frequency 50-60Hz) to ensure that the concrete fully fills the mold texture grooves, avoiding texture defects caused by air bubbles or material shortage. For mass-produced standard components (such as UHPC curtain wall panels for commercial complexes), mold numbering management and a first-article inspection system keep texture consistency errors within 3%, ensuring the overall visual uniformity of the building facade.

III. Industry Practice and Qinglong's Technical Advantages: Full-Chain Capabilities from Standards to Customization

As a participating contributor to the industry standard "General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC)," Qinglong Group has incorporated mold technology into its full-chain quality control system. From the GRC shaped curtain wall of the Dongguan Women and Children's Activity Center (mold reuse rate of 85%) to the UHPC relief components of a landmark project in Malaysia (texture depth up to 15mm), Qinglong provides designers and owners with full-process solutions from concept to implementation through integrated "design-mold-production-installation" services. Its Guangxi production base is equipped with a professional mold workshop, with an annual capacity of 600,000 square meters, capable of meeting the large-scale production needs of complex-texture UHPC components.

The texture effects on UHPC sculptural surfaces represent a perfect fusion of materials science and craftsmanship aesthetics. Breakthroughs in mold technology not only expand the decorative boundaries of UHPC, but also drive building facades toward "artistic and personalized" development. Founded on 28 years of industry experience, Qinglong Group, through digital design, precision manufacturing, and full-process management, has built mold craftsmanship into the "core competitiveness" of UHPC decoration, endowing each project with a unique textural soul. In the future, with the application of technologies such as 3D-printed molds and intelligent temperature-controlled curing, UHPC texture realization will advance toward higher precision and broader possibilities, injecting continuous innovation momentum into the architectural decoration industry.