What Effects UHPC Panel Surface Acid Wash Treatment Achieves and Analysis of Its Practical Applications

Empowering Surface Treatment with Technology, Defining Material Aesthetics Through Craftsmanship — Innovative Practice and Value Analysis of UHPC Panel Acid-Etching Technology

In the field of architectural decorative materials, ultra-high performance concrete (UHPC) is becoming the material of choice for premium building envelopes thanks to its outstanding mechanical properties and design flexibility. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP, Qinglong Group deeply understands the decisive role that surface treatment plays in the final appearance. Among these techniques, acid-etching, as a key technology for UHPC panel surface treatment, not only significantly enhances the material's physical performance and visual expressiveness, but also demonstrates unique technical advantages and economic value in practical engineering applications.

### Core Technical Principles and Process Advantages of UHPC Panel Acid-Etching

The acid-etching of UHPC panels is a fine finishing process that reshapes the surface microstructure through a controlled chemical reaction between a specific acid solution and the concrete surface. This technology leverages the selective dissolution of cement hydration products by the acid, removing surface laitance and impurities while forming a uniformly distributed micro-pore structure. This treatment gives the UHPC panel surface a fine matte texture, which not only improves the material's anti-slip performance (friction coefficient increased by over 30%), but also enhances the depth and artistic expressiveness of the finish through diffuse light reflection. Compared with traditional mechanical grinding, acid-etching offers significant advantages such as dust-free operation, high surface texture consistency, and minimal damage to substrate strength, making it particularly suitable for the surface treatment of complex-shaped components.

### Multi-Dimensional Performance Enhancement of UHPC Panels Through Acid-Etching

In terms of physical performance, the acid-etching process optimizes the surface pore structure, reducing the surface water absorption of UHPC panels by 15%-20% and significantly enhancing the material's impermeability and weather resistance. Measured data from a municipal project show that acid-etched UHPC sunshade panels exhibited no surface cracks after 300 freeze-thaw cycles, with a compressive strength retention rate of over 95%. In terms of decorative effect, the acid-etching process can adjust surface roughness according to design requirements, and combined with coloring techniques, can replicate the textures of natural stones such as sandstone and basalt, achieving a remarkably lifelike decorative effect. In a commercial complex project in Nanjing, Qinglong Group applied customized acid-etching parameters to successfully finish UHPC panel surfaces with a lychee-textured finish that harmonized with the adjacent stone curtain wall, reducing material costs by 30% and shortening the installation period by 40%.

### Typical Engineering Application Scenarios of Acid-Etching Technology

Thanks to their excellent performance, acid-etched UHPC panels show broad application prospects in high-end architecture. In cultural buildings, the curved exterior wall panels of a grand theater in Guangzhou, made of acid-etched UHPC, feature 0.2-0.5mm surface texture variations through precise control of etching depth, creating rich interplays of light and shadow under different lighting conditions. In landscape engineering, UHPC benches along a riverside promenade in Shanghai achieved a surface anti-slip coefficient of 0.85 after acid-etching, along with excellent wear resistance, solving the common problems of dusting and slipping associated with traditional concrete products. In commercial buildings, the UHPC decorative moldings of a shopping mall in Shenzhen achieved a natural transition from matte to high gloss through a gradient acid-etching process, perfectly presenting the “fluidity” visual effect pursued by the designer.

### Qinglong Group's Full-Chain Service Guarantee for Acid-Etching Technology

As a national high-tech enterprise and a participant in developing UHPC industry standards, Qinglong Group has established a full-process service system for acid-etching technology, from detailed design to after-sales maintenance. Relying on a provincial engineering technology center, the company has developed intelligent temperature-controlled acid-etching equipment and eco-friendly acid solution formulations, achieving digital control and green production throughout the treatment process. During project implementation, the Qinglong team simulates acid-etching effects using BIM technology and combines on-site 3D scanning for precise positioning and installation, ensuring that every UHPC component meets design requirements. From standardized precasting at its production base in Nanning, Guangxi, to rapid response from offices nationwide, Qinglong Group draws on 28 years of industry experience to provide customers with a one-stop “design-production-installation-maintenance” solution, making acid-etched UHPC technology a true value engine for enhancing building quality.

The innovative application of acid-etching technology is redefining the value boundaries of UHPC materials. Qinglong Group will continue to uphold the philosophy of “professional innovation and green environmental protection” and, through technological R&D and process optimization, enable more buildings to achieve a perfect fusion of aesthetics and performance, creating more possibilities for urban spaces.