Surface Decoration Treatment Methods for UHPC Exterior Wall Panels and Application Analysis

As the first language of dialogue between a building and the city, the building envelope's texture and craftsmanship directly determine the building's artistic expression and value presentation. In the field of new decorative building materials, UHPC (Ultra-High Performance Concrete), with its ultra-high strength, outstanding durability, and exceptional moldability, is becoming the preferred material for high-end building facade decoration. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group deeply understands the integration needs of design and engineering. This article systematically analyzes the five major surface decorative treatment processes of UHPC facade panels and their engineering application logic, providing designers and owners with professional reference from aesthetic conception to implementation.

I. Core Processes and Technical Characteristics of UHPC Facade Panel Surface Decoration

Surface decorative treatment of UHPC facade panels is the key point where material performance meets aesthetic expression, and process selection must balance architectural style, environmental adaptability, and cost control. Currently, mainstream treatment methods can be divided into five major categories:

1. Mold-Formed Texture Process: Using custom steel molds or silicone molds to directly press surface textures during the UHPC casting stage, complex texture effects such as wood grain, stone grain, and geometric relief can be achieved. This process requires no secondary processing, with surface precision up to 0.1mm, and is suitable for buildings imitating natural materials or in industrial style. Through its self-developed modular mold system, Qinglong Group has increased the reuse rate of the same texture mold by 40%, effectively reducing customization costs.

2. Surface Coating Treatment Technology: Including high-performance coating systems such as fluorocarbon paint and polysiloxane, offering solid colors, metallic luster, or stone-imitation color effects. Qinglong's Nanning production base is equipped with an automated spraying line, with coating adhesion exceeding 10MPa and artificial aging resistance tested beyond 3000 hours, making it particularly suitable for commercial complex projects with high color consistency requirements.

3. Fine Grinding and Polishing Process: Multi-stage grinding brings the UHPC surface to a mirror or matte finish, highlighting the material's own delicate texture. This process can be combined with dyeing technology to achieve gradient color effects. In the Century Plaza renovation project on Nanjing East Road, the translucent UHPC curtain wall created by Qinglong using this process presents a warm jade-like texture by day and emits a uniform, soft halo through lighting at night, becoming a landmark urban nightscape.

4. Openwork and Relief Forming Technology: Leveraging UHPC's ultra-high compressive strength (≥150MPa), complex patterns are expressed in three dimensions through CNC engraving or prefabricated openwork molds. In the Dongguan Women and Children's Activity Center project, the Qinglong team successfully incorporated relief patterns with 0.8mm fine lines into UHPC facade panels, with individual components reaching a maximum size of 3.6m×1.2m and installation precision controlled within ±2mm.

5. Composite Facing Process: Combining UHPC with materials such as glass fiber and metal sheets creates special visual effects. For example, embedding a glass fiber mesh in the UHPC substrate achieves a translucent effect, while aluminum foil composites present a metallic texture while enhancing thermal insulation. Qinglong's UHPC-glass composite panels have been applied in an airport project in Malaysia, balancing decorative appeal with energy-saving requirements.

II. Engineering Adaptation Logic of Process Selection and Analysis of Typical Cases

The selection of different decorative processes must be based on comprehensive consideration of project positioning, cost budget, and environmental conditions. Cultural tourism buildings prioritize mold-formed texture or openwork relief processes to create unique cultural symbols; commercial buildings often adopt coating treatment technology to accurately realize brand VI colors; while landmark public buildings can use composite facing processes to create differentiated visual focal points.

Taking a grand theater project in a provincial capital city that Qinglong participated in as an example, the designers required the facade to present a dynamic "water ripple" effect. The team adopted a combined process of mold forming plus local grinding: first creating a 1:1 ripple mold through 3D printing, then finely polishing the wave crest areas after casting to form a flowing texture of light-dark contrast. This solution reduced costs by 25% compared to full polishing, and through standardized mold design, shortened the production cycle to 15 days per batch.

III. Full-Chain Service Ensures Precise Realization of Decorative Effects

Achieving the decorative effect of UHPC facade panels is by no means the result of a single production stage, but a systematic project involving detailed design, production control, and construction installation. As a national-level high-tech enterprise, Qinglong has established a full-process quality control system covering BIM parametric design, mold development, and material mix optimization to on-site 3D positioning and installation. Through its self-developed material mix database, UHPC fluidity and strength parameters can be adjusted according to the requirements of different decorative processes; the equipped 3D laser scanning equipment enables real-time monitoring of installation errors, ensuring decorative surface joint precision of ≤1mm.

From the stone-imitation UHPC curtain wall of a commercial complex in Guangzhou to the weather-resistant coated facade of a coastal building in Australia, Qinglong's 28 years of industry experience prove that surface decorative treatment of UHPC facade panels is both technology and art, requiring deep integration of materials science, engineering technology, and aesthetic design. As a system solution provider of UHPC/GRC/GRG/GRP materials, Qinglong will continue to drive the aesthetic upgrade of building envelopes through technological innovation, providing designers with broader material possibilities to realize their creative visions.