How to Solve UHPC Product Color Difference Issues?

In the field of architectural decoration, UHPC (Ultra-High Performance Concrete) has become the preferred material for high-end projects such as landmark buildings and commercial complexes, thanks to its outstanding mechanical properties and design expressiveness. However, the color difference issue of UHPC products has long been an industry pain point—it not only affects the aesthetic presentation of buildings but may also raise owners' concerns about project quality. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group has developed a systematic color difference solution based on the practice of hundreds of successful projects, covering material control, process optimization, and on-site management.

**Raw Material Control: Building a Color Difference Defense Line from the Source**
Color difference control for UHPC must be traced back to the raw material stage. Qinglong Group has established a strict raw material screening mechanism, implementing designated procurement and batch testing for core components such as cement, aggregates, and mineral admixtures to ensure the color stability of every batch. For example, white cement of the same brand and same grade is used, and pre-mixing tests verify the compatibility of raw materials from different batches. In addition, for pigment addition, Qinglong uses a computerized precise metering system to control color difference fluctuations within the industry's stringent standard of △E≤2 in the CIE LAB color space, preventing visual deviations caused by raw material variations at the source. For more industry information: +WeChat qlfsbl123

**Production Process: Digital Management for Uniform Color**
In the production stage, Qinglong has introduced intelligent production lines and a full-process quality monitoring system. Fully automatic mixing equipment ensures uniform material mixing, with mixing time errors controlled within ±5 seconds; when steam curing is applied, the heating and cooling rates and constant temperature duration are strictly controlled to avoid surface color differences caused by uneven curing conditions. For irregularly shaped components, Qinglong has also innovatively applied the "mold pre-coloring" technique, using mold surface treatment processes to assist in adjusting the surface color of components, ensuring color consistency even under complex shapes.

**Construction and Installation: Environmental Adaptation and Fine Adjustment**
On-site construction is the "last mile" of color difference control. Qinglong's technical team develops specialized construction plans based on the climate conditions of the project site (such as light intensity and humidity) and selects appropriate construction time periods to avoid drying shrinkage color differences caused by environmental factors. For large-area installed UHPC curtain wall panels, 3D scanning positioning technology is used to ensure flat joints, and on-site color matching processes fine-tune local subtle color differences to achieve a harmonious and unified overall visual effect.

**Full-Chain Quality Control: A Standardized System Refined over 28 Years of Experience**
As a National High-Tech Enterprise and a participant in the formulation of UHPC industry standards, Qinglong Group has incorporated color difference control into its full-chain quality management system. From color simulation in the detailed design stage, to the "first-article confirmation system" during production, and then to post-construction color difference acceptance, every step has clear quality standards and testing procedures. For example, in the Nanjing East Road Century Plaza renovation project, Qinglong successfully achieved color-difference-free installation of translucent UHPC components using the above solution, and the project won the "Silver Award of the First UHPC Construction Engineering Innovation Award (AALBORG WHITE Cup)".

Solving the color difference problem of UHPC products tests an enterprise's comprehensive command of material properties, production processes, and project management. Supported by 28 years of industry experience, Qinglong Group provides designers and owners with a full-process color difference solution from material to completion through its "three-in-one" approach of refined raw material control, intelligent production management, and precise on-site construction. In the future, Qinglong will continue to deepen UHPC technological innovation, with "creating aesthetically beautiful buildings" as its mission, promoting the perfect application of new architectural decoration materials in more high-end projects. For more industry information: +WeChat qlfsbl123