What Effects Can Acid-Wash Surface Treatment Achieve on UHPC Panels: Principles, Process, and Practical Application Analysis

What Effects Can Surface Acid Etching Treatment Achieve on UHPC Panels: Principles, Processes, and Practical Application Analysis

In the field of architectural decorative materials, UHPC (Ultra-High Performance Concrete) has become the ideal choice for exterior wall cladding panels and sunshades of high-end buildings such as grand theaters, convention centers, and commercial complexes, thanks to its excellent mechanical properties and durability. However, how can the surface texture and performance of UHPC panels be further enhanced? Surface acid etching treatment technology provides the answer. As an industry leader with 28 years of experience in detailed design, production, and manufacturing of UHPC/GRC/GRG/GRP materials, Qinglong Group will analyze this key technology for designers and owners from the perspectives of principles, processes, and practical applications.

1. Core Principles of Surface Acid Etching Treatment for UHPC Panels: Micro-Level Performance Enhancement

The surface acid etching treatment of UHPC panels essentially achieves dual optimization through a controlled chemical reaction between the acid solution and the concrete surface layer. On one hand, the acid solution can dissolve components such as calcium hydroxide in the surface cement paste, exposing the uniformly distributed quartz sand and steel fibers inside, forming a rough and richly textured surface structure that significantly enhances decorative quality; on the other hand, after the soluble salts generated by the reaction are rinsed away with clean water, surface porosity is reduced, enhancing impermeability and weather resistance. This process requires precise control of acid concentration and treatment time to avoid excessive corrosion that would affect the structural strength of the panels. Relying on the technical expertise of its provincial-level R&D center, Qinglong Group has established a standardized parameter system.

2. Full Process of Acid Etching Treatment: Rigorous Control from Pretreatment to Quality Inspection

High-quality acid etching results for UHPC panels depend on refined process management. Qinglong Group's treatment process includes: first, surface pretreatment of the molded UHPC panels to remove release agent residue and floating dust; then acid etching is performed by spraying or immersion, with the acid formula adjusted according to design requirements (such as a phosphoric acid and organic acid composite system); immediately after treatment, high-pressure water rinsing is carried out to ensure no acid residue remains; finally, surface roughness and texture uniformity are inspected through 3D scanning. Taking the translucent concrete project of the Nanjing East Road Century Plaza renovation as an example, this process reduced the surface gloss of UHPC panels by 30%, creating a harmonious textural contrast with the glass curtain wall, and won the Silver Award at the first UHPC Construction Engineering Innovation Award of the AALBORG WHITE Cup. For more industry information: +WeChat qlfsbl123

3. Practical Application Value: Multidimensional Breakthroughs from Aesthetic Presentation to Functional Enhancement

In actual projects, acid etching treatment brings multiple values to UHPC panels. At the aesthetic level, the natural stone-like and concrete-like textures it creates meet modern architecture's design demands for “industrial style” and “natural style”. For example, in a commercial complex project, acid-etched UHPC sunshades echo the GRG ceiling in material, enhancing the sense of spatial layering. At the functional level, the treated surface can increase coating adhesion by 40%, extending the service life of exterior wall decoration; meanwhile, the micro-textures can scatter light, reducing light pollution. In an airport project in Malaysia, Qinglong Group's acid-etched UHPC exterior wall panels successfully withstood the erosion of a tropical high-humidity, high-salt environment, demonstrating the material's durability advantages.

4. Industry Application Trends: Technological Innovation Driving Material Upgrades

As architectural design pursues personalization and high performance, UHPC panel surface treatment technology is developing toward intelligence and customization. As a participating unit in drafting the industry standard “General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC)”, Qinglong Group is exploring the integration of acid etching processes with 3D printing and parametric design to achieve more complex surface texture customization. In the future, acid etching treatment will not only be a conventional process for enhancing UHPC panel performance, but will also become an important means for designers to express creativity, promoting the widespread application of new architectural decorative materials in high-end fields. For more industry information: +WeChat qlfsbl123

As one of the larger comprehensive UHPC/GRC/GRG/GRP manufacturers in China, Qinglong Group has always taken “creating beautiful architecture” as its mission, providing customers with material solutions that combine aesthetic value and engineering reliability through technological innovation and full-chain services. The in-depth application of acid etching treatment technology is a vivid embodiment of Qinglong practicing its vision of “becoming an outstanding world-leading manufacturing enterprise” in its niche segment.