What Are the Surface Decoration Treatment Methods for UHPC Exterior Panels and Application Analysis

In the field of contemporary architectural decoration, UHPC facade panels are becoming the material of choice for high-end building envelope design, thanks to their ultra-high strength, excellent durability, and outstanding plasticity. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group deeply understands the critical role that surface finishing treatment plays in the aesthetic expression and functional performance of UHPC facade panels. This article systematically analyzes mainstream surface finishing processes for UHPC facade panels and their innovative applications in different scenarios, providing a professional reference for designers and owners.

The surface finishing technology system for UHPC facade panels can be divided into two major categories: physical forming and chemical treatment, with each process requiring a balance between material characteristics and architectural requirements. Physical forming processes achieve decorative effects through mold shaping and surface texture control, including fair-faced concrete techniques, imitation stone lychee-texture treatment, and special-shaped relief molding. The fair-faced UHPC process relies on the material's inherent density and color stability to create a simple, natural textural quality. This process was successfully applied in the Century Plaza renovation project on Nanjing East Road, where the combination of translucent concrete and fair-faced surfaces created an artistic interplay of light and shadow alternating between day and night. Imitation stone lychee-texture treatment simulates the rough texture of natural granite through special molds or post-production sandblasting; its anti-slip performance and weather resistance make it an ideal choice for the podium walls of commercial complexes.

Chemical treatment processes primarily expand decorative dimensions through surface coating and coloring technologies, including fluorocarbon paint spraying, inorganic nano coloring, and antique aging treatment. Fluorocarbon coating systems offer UHPC facade panels a rich palette of colors and superb weather resistance, performing particularly well in high-rise buildings in coastal regions. Inorganic nano coloring technology achieves a deep fusion of color with the base material, solving the problem of easy fading associated with traditional coatings. Qinglong Group adopted this technology in the Dongguan Women and Children's Activity Center project, ensuring long-term color stability of the building envelope. Antique aging treatment, through the combination of special chemical agents and physical etching, creates unique textures on UHPC surfaces resembling the erosion of time, offering an innovative solution for historic building restoration projects.

The application of different finishing processes must match the project's functional positioning and aesthetic pursuits. In the field of large public buildings, such as theaters and convention centers, double-curved UHPC skins combined with gradient color treatment are commonly used, achieving fluid expression of architectural form through parametric design. Commercial complexes often employ combinations of metallic-texture coatings and openwork carving to create architecturally dynamic and commercially vibrant building interfaces. Cultural landmark projects tend to integrate UHPC with traditional craftsmanship—for example, in a museum project Qinglong participated in, UHPC surface imitation bronze etching technology achieved a perfect fusion of modern materials and traditional cultural symbols.

As a national high-tech enterprise and a participant in setting UHPC industry standards, Qinglong Group, with a production base of 600,000 square meters annual capacity and full-chain service capabilities, has achieved closed-loop service from finishing process R&D to project implementation. For material selection, designers are advised to comprehensively consider the climate conditions of the project location, the building's function, and maintenance requirements: in high-humidity environments, stain-resistant self-cleaning coatings should be prioritized; in severely cold regions, attention should be paid to the bond strength between the decorative layer and the base material; and in historic districts, emphasis should be placed on the harmony between the process and the cultural context. Through the scientific selection of finishing treatments, UHPC facade panels can not only meet the physical performance requirements of buildings but also serve as an important vehicle for conveying architectural spirit.