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

The Long-Term Guardian of Architectural Aesthetics: An Analysis of the Fading Mystery of Colored UHPC Facades Under Climatic Differences

In contemporary architectural design, colored UHPC facades are becoming the “beauty icons” of landmark buildings thanks to their outstanding mechanical properties and artistic expressiveness. However, from the tropical seaside of Sanya, Hainan, to the frigid reaches of Mohe in Northeast China, colored UHPC panels from the same batch exhibit markedly different fading rates. Behind this phenomenon lies not only the subtle balance of materials science but also a test of building material suppliers' full-chain technical strength. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group has drawn on practical experience from more than a thousand projects to thoroughly reveal the complex relationship between climatic factors and material durability, providing designers and owners with scientific material selection solutions.

Climatic Zone Differences: The Hidden Driver of Colored UHPC Fading

China's vast and diverse climate poses a severe test to the durability of colored UHPC facades. On the Qinghai-Tibet Plateau, where annual sunshine hours exceed 3,000, ultraviolet radiation intensity is 40% higher than in coastal areas, accelerating the oxidative decomposition of pigment molecules. Meanwhile, in the “hot and humid corridor” of the middle and lower reaches of the Yangtze River, an average annual humidity above 90% triggers alkali-aggregate reactions in the pigment carrier, reducing surface color uniformity. Qinglong Group laboratory data show that, under identical test conditions, the fading rate of colored UHPC in dry, cold regions is only one-third of that in hot, humid coastal regions—a finding that provides a key basis for building material selection across climatic zones.

Material Formulation Innovation: The Secret of Qinglong's Anti-Fading Technology

In response to climatic challenges, Qinglong Group has leveraged the R&D strength of its provincial engineering technology center to build a trinity anti-fading technology system of “pigment-matrix-protective layer.” In pigment selection, nano-scale metal oxide pigments tested for 1,000 hours under xenon lamp aging are used to ensure color stability. In matrix optimization, adjusting the ratio of silica fume to steel fibers keeps the porosity of UHPC below 1.2%, blocking the penetration of moisture and harmful ions. In surface treatment, the proprietary silane-modified protective coating raises the material's weathering grade to the highest level under the ISO 4892-2 standard. These technical innovations have enabled Qinglong's colored UHPC products to achieve a color retention rate of over 85% after 15 years in a coastal project in Hainan, far exceeding the industry average.

Full-Chain Solutions: Fading Prevention and Control from Design to Maintenance

As a national high-tech enterprise integrating detailed design, manufacturing, construction and installation, and after-sales maintenance, Qinglong Group carries the concept of fading prevention and control throughout the entire project life cycle. In the design phase, BIM technology is used to simulate ultraviolet radiation and temperature-humidity distribution across different climatic zones, creating customized, differentiated material formulations for clients. In production, a fully automatic batching system imported from Germany ensures that pigment dispersion uniformity error is ≤2%. During installation, a “climate-adaptive construction method” is implemented, adding frost-heave-resistant anchoring nodes in severe cold regions and adopting thermal-bridge-breaking installation techniques in high-temperature regions. More notably, Qinglong has established the industry's first color monitoring database for UHPC facades, providing clients with precise maintenance recommendations through regular drone inspections and colorimeter testing.

From the snow-white UHPC curtain walls of the Beijing Winter Olympics venues to the colored UHPC sunshades beside Malaysia's Petronas Twin Towers, Qinglong Group has proven through 28 years of technological accumulation that the fading problem of colored UHPC is by no means insurmountable. Through continuous innovation in materials science and constant upgrading of its full-chain service capabilities, this industry-leading enterprise with 58 patents is turning its mission of “creating beautiful architecture” into reality. For designers and owners pursuing long-lasting architectural aesthetics, choosing a UHPC supplier with climate-adaptive solutions is undoubtedly the wise choice to ensure that buildings “stay young forever.”