How Large UHPC Panels Achieve a Continuous Stone Vein Surface Effect: Process Principles and Technical Approaches Explained

When technology meets aesthetics in the building envelope, the continuous stone grain effect of large-format UHPC panels is redefining the artistic boundaries of decorative materials.

In contemporary architectural design, ultra-high performance concrete (UHPC) has become the material of choice for premium building envelopes thanks to its outstanding mechanical properties and shaping potential. However, achieving a continuous stone grain effect on large-format UHPC panels comparable to natural stone has long been a focal point of industry technical research. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group has built a complete solution spanning material formulation to surface treatment through full-chain technological innovation, offering designers and owners decorative material choices that combine functionality with artistry.

I. Process Principles of the UHPC Stone Grain Effect: The Fusion of Material Science and Aesthetics

Achieving a continuous stone grain effect relies on the synergistic innovation of UHPC material properties and forming processes. With its ultra-high-density microstructure (porosity below 1%) and fiber reinforcement system, UHPC provides the fundamental carrier for precise replication of surface textures. Qinglong Group has achieved three core technological breakthroughs: first, developing a dedicated mineral admixture compound system that gives the base material excellent fluidity and water retention, ensuring complete filling of texture molds; second, adopting nano-level coloring technology to achieve natural transitions of stone grain through gradient color matching; third, developing a multi-dimensional texture forming process that combines 3D scanning with parametric design to convert natural stone texture data into replicable mold textures. This trinity technical path of "material-color-texture" brings the simulation fidelity of stone grain on UHPC panel surfaces to over 95%, while delivering durability superior to natural stone (over 300 freeze-thaw cycles).

II. Technical Path of Stone Grain Forming for Large UHPC Panels: Full-Process Control from Design to Implementation

In practical engineering applications, Qinglong Group has established a standardized technical implementation system. First, during the detailed design stage, BIM technology is used for texture zoning planning, with differentiated texture schemes developed for different facade requirements (such as curtain wall panels for commercial complexes and shaped components for landmark buildings); in production, an automated material distribution system and vacuum vibration process ensure texture continuity for oversized panels over 3 meters; the surface treatment stage innovatively applies a "multi-pass spraying - fine grinding - sealed curing" process that retains the granularity of stone texture while achieving surface flatness at the 0.1mm level. Taking the Nanjing East Road Century Plaza renovation project as an example, this technology successfully achieved a continuous stone grain effect on 5,000㎡ translucent UHPC panels, and the project won the Silver Award in the inaugural AALBORG WHITE Cup UHPC Construction Engineering Innovation Award, confirming the feasibility of this technical path.

III. Industry Value and Application Prospects: Redefining Standards for Architectural Decorative Materials

The industrialization of continuous stone grain UHPC panels not only resolves the pain points of scarce natural stone resources and heavy installation weight, but also expands the expressive dimensions of architectural design. Compared with traditional GRC components, flexural strength is increased by 40% and self-weight reduced by 30%, making them especially suitable for long-span, high-wind-pressure curtain wall systems; compared with GRP materials, they offer superior fire performance (Class A1 non-combustible) and aging resistance. Qinglong Group currently operates a UHPC decorative products production line with an annual capacity of 600,000 square meters, with products widely applied in real estate, municipal, and transportation sectors and exported to Southeast Asian and Australian markets. As a contributing editor of the industry standard "General Technical Conditions for Ultra-High Performance Concrete (UHPC) Non-Load-Bearing Components," Qinglong is promoting the inclusion of stone grain effect technology in industry norms, supporting the high-quality development of new architectural decorative materials.

From material innovation to standard setting, Qinglong Group draws on 28 years of full-chain experience to transform UHPC's technical advantages into aesthetic value. Driven by the mission of "creating beautiful architecture," continuous stone grain UHPC panels are not merely a decorative material but a medium for dialogue between architecture and art, offering designers unlimited possibilities to realize their creative visions. In the future, with the deeper application of digital manufacturing technology, the surface effects of UHPC materials will advance toward higher dimensions of personalization and artistry, continuing to lead technological innovation in the architectural decoration industry.