Study on Fading Rate Differences of Colored UHPC Facades in Different Climate Zones and Analysis of Influencing Factors

As a representative of new decorative building materials, colored UHPC facade panels have been widely applied in high-end projects such as grand theaters, commercial complexes, and landmark buildings, thanks to their ultra-high strength, excellent durability, and rich color expressiveness. However, environmental factors in different climate zones—such as sunlight, temperature, humidity, and UV intensity—directly affect the fading rate of colored UHPC facades, thereby impacting the building's aesthetics and service life. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group combines engineering practice with technological R&D to analyze in depth the fading differences and key influencing factors of colored UHPC facades across different climate zones, providing professional solutions for designers and owners.

**I. Climate Zone Differences: The "Hidden Driver" of Fading Rates in Colored UHPC Facades**

China's vast territory spans from the cold Northeast to the hot and humid South, with significant climate differences, and the fading performance of colored UHPC facades also shows distinct regional characteristics. In plateau regions with intense UV radiation (such as Tibet and Qinghai), prolonged strong UV exposure accelerates the decomposition of pigment molecules, reducing the color saturation of facades, with fading rates 15%-20% higher than in plain areas; in hot and humid southern coastal regions (such as Guangdong and Hainan), the humid-heat environment easily triggers pigment oxidation reactions, while salt fog corrosion damages the UHPC surface protective layer, making the fading problem more complex. By contrast, fading rates in temperate monsoon climate zones (such as North China and East China) are relatively low, with annual fading kept within 5%. The climate simulation laboratory established by Qinglong Group at its Nanning production base has accumulated extensive fading rate data through accelerated aging tests simulating different climate conditions, providing a scientific basis for material selection in projects across various regions.

**II. Materials and Processes: Core Controllable Factors Affecting Fading Rates**

The fading rate of colored UHPC facades is influenced not only by external climate but also critically by the material's own performance and production processes. In terms of pigment selection, inorganic mineral pigments (such as iron oxide and chromium oxide series) offer more excellent weather resistance than organic pigments, reducing the fading rate by more than 30% under the same climate conditions. As a national high-tech enterprise, Qinglong Group adopts its self-developed nano-scale pigment dispersion technology to distribute pigment particles evenly throughout the UHPC matrix, effectively enhancing color stability. In addition, surface protection processes are also crucial—treatments such as silane impregnation and fluorocarbon coatings form a dense protective layer on the UHPC surface, blocking the erosion of ultraviolet rays, water vapor, and pollutants. Take the Nanjing East Road Century Plaza renovation project as an example: the Qinglong team used light-transmitting UHPC panels combined with a special anti-UV coating, and three years after project completion, color retention still reached over 90%, winning the Silver Award of the AALBORG WHITE Cup UHPC Construction Engineering Innovation Award.

**III. Full-Chain Solutions: Qinglong Helps Colored UHPC Facades Stay "Ever New"**

To address the fading challenges of different climate zones, Qinglong Group leverages its full-chain advantages in detailed design, manufacturing, construction and installation, and after-sales maintenance to provide customized services for clients. At the design stage, relying on the technical strength of its provincial-level R&D center, it recommends suitable pigment systems and protection solutions based on the climate parameters of the project location; in production, strict implementation of the ISO9001 quality system and intelligent production lines with an annual capacity of 600,000 square meters ensure stable product performance; during construction, BIM technology and 3D laser scanning positioning enable precise installation and reduce damage to the surface protective layer from on-site cutting; and in the after-sales stage, a regular inspection mechanism provides professional maintenance recommendations. From the domestic Dongguan Women and Children's Activity Center GRC project to landmark buildings exported as far as Malaysia in Southeast Asia, Qinglong, with its meticulous and excellence-pursuing attitude, ensures the aesthetics and durability of colored UHPC facades under various climate conditions, fulfilling its mission of "creating beautiful architecture."

As a participant in setting UHPC/GRC/GRG/GRP industry standards, Qinglong Group has always driven industry development through technological innovation. In the future, we will continue to deepen climate adaptability research and further reduce the fading rate of colored UHPC facades through material formulation optimization and protection technology upgrades, providing more reliable material support for designers to realize their creative visions and helping create more architectural works that combine aesthetic value with durability.