Discussion on the Current Status, Challenges and Future Development Paths of Combining GRC with 3D Printing Technology

When architectural aesthetics collide with digital manufacturing, GRC materials are reshaping industry boundaries in a brand-new form. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group has witnessed and driven the deep integration of 3D printing technology with traditional building materials, exploring a unique development path in this manufacturing revolution.

Technical Coupling of GRC and 3D Printing: Current Status and Breakthroughs

The GRC industry is currently experiencing the growing pains of transitioning from traditional mold casting to digital construction. With its advantages of mold-free, rapid forming, 3D printing technology has demonstrated significant value in the customization of irregular-shaped components—in a double-curved GRC curtain wall project for a cultural center, the adoption of concrete extrusion 3D printing technology shortened the production cycle by 40% and increased material utilization to over 95%. Leveraging the technical expertise of its national-level R&D center, Qinglong Group has achieved compatibility between GRC materials and processes such as Fused Deposition Modeling (FDM) and Selective Laser Sintering (SLS), and has developed a specialized printing slurry formula with a flexural strength of 22MPa, meeting the requirements of the JGJ/T423-2018 standard.

Practical Challenges of Technology Integration: From Laboratory to Construction Site

Despite broad prospects, the combination of GRC and 3D printing still faces three core challenges. At the material level, printing slurry must balance flowability with early strength; Qinglong's R&D team successfully solved the problem of insufficient interlayer bonding strength by incorporating nano silica fume and basalt fibers. In terms of equipment, precision control for printing large components remains a difficulty—the printing error of mainstream industry equipment is currently around ±2mm, while landmark buildings often demand tolerances tighter than ±0.5mm. In terms of cost, the daily operation and maintenance cost of a single large 3D printer exceeds 10,000 yuan, still 30%-50% higher than traditional mold processes, which limits large-scale application.

Three-Dimensional Path for Future Development: Technology, Application, and Ecosystem

Looking toward the industry's future, Qinglong Group has proposed a development strategy of "digital-driven, green-led, standards-first." In terms of technological innovation, it is developing a five-axis linkage printing robot with the goal of achieving integrated forming of extra-large components at the 10-meter scale; in terms of application scenarios, it is focusing on expanding into specialized segments such as GRG decorative moldings and light-transmitting UHPC components, and has successfully applied 3D-printed translucent concrete technology in the Century Plaza renovation project on Nanjing East Road. More notably, as a drafting unit of the industry standard "General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC)," Qinglong is promoting the establishment of a quality evaluation system for 3D-printed GRC components, covering 12 key indicators including printing precision and durability.

From the innovative GRC application at the Dongguan Women and Children's Activity Center to technology export for overseas projects in Southeast Asia, Qinglong Group, grounded in 28 years of whole-industry-chain experience, continues to explore the digital future of building materials. When the flexible manufacturing of 3D printing meets the material resilience of GRC, it represents not only a revolution in production methods but also provides architectural designers with unprecedented creative freedom, ultimately fulfilling the mission and vision of "creating aesthetically beautiful buildings." In this industrial upgrading, only through the dual drivers of technological breakthroughs and standards development can innovation truly take root.