How UHPC Hollow-Out Components Ensure Structural Strength of Hollow-Out Sections: A Study on Collaborative Optimization Strategies of Design, Materials and Process

Empowering Art with Technology, Safeguarding Safety with Craftsmanship — The Structural Aesthetics and Technical Breakthroughs of UHPC Hollow-Out Components

In the field of architectural decoration, UHPC (Ultra-High Performance Concrete) is becoming a key material for shaping architectural aesthetics thanks to its outstanding mechanical properties and design freedom. Among its applications, UHPC hollow-out components are highly favored in settings such as grand theaters, commercial complexes, and landmark buildings for their light and translucent visual effect. However, while hollow-out design endows buildings with artistic appeal, it also poses severe challenges to structural strength. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group has successfully solved this challenge through a coordinated strategy of design optimization, material innovation, and process upgrades, providing designers and owners with solutions that combine aesthetics and safety.

I. Structural Challenges and Design Logic of UHPC Hollow-Out Components

The core contradiction of hollow-out design lies in balancing the "hollow-out ratio" with "structural load-bearing capacity." Traditional concrete materials are prone to stress concentration when the hollow-out ratio exceeds 30%, while UHPC, with its compressive strength above 200MPa and excellent toughness, makes high hollow-out ratio designs possible. During the detailed design phase, Qinglong Group uses parametric modeling (Rhino+Grasshopper) and finite element analysis to accurately simulate stress distribution in hollow-out areas, controlling the cross-sectional thickness of key load-bearing nodes at 50-80mm, and adopts a "grid skeleton + gradient wall thickness" design — reinforcement ribs 1.5 times thicker along the edges of hollow-out areas and honeycomb-like support structures inside — which not only ensures a light transmittance rate of over 40% but also raises the flexural strength of components to 35MPa, far exceeding industry standards.

II. Material Synergy: Dual Guarantees of Fiber Reinforcement and Mix Ratio Optimization

As the technical core of a UHPC manufacturer, innovation in material formulation is the foundation of structural strength. Qinglong Group adopts a dual-blend system of "steel fiber + ultra-fine silica fume," with steel fiber volume content reaching 2.5% and fiber length controlled at 13-19mm, forming a three-dimensional randomly distributed reinforcement network; meanwhile, the ratio of cement to mineral admixtures is optimized to achieve slurry fluidity of over 250mm, ensuring dense filling of hollow-out areas. For complex hollow-out shapes, a GRP (glass-reinforced thermoset plastic) composite layer has been innovatively introduced, forming a lightweight, high-strength "load-bearing back panel" on the back of components, reducing overall weight by 20% while improving impact resistance by 40%.

III. Process Upgrades: Full-Process Quality Control from Mold to Installation

The refinement of production processes directly determines the structural stability of hollow-out components. At its production base in Nanning, Guangxi, Qinglong Group has introduced digital mold technology, combining 3D-printed sand molds with CNC-carved wooden molds to keep dimensional accuracy errors of hollow-out patterns within ≤0.5mm; the casting process uses vacuum-assisted forming (VAF) technology to eliminate bubbles and voids, achieving 99.8% compactness; the curing stage involves 72 hours of steam curing at 90℃ to promote complete hydration reactions, with compressive strength surpassing 150MPa. During construction and installation, "embedded metal connectors + 3D laser positioning" technology is used, together with Qinglong's proprietary "dry-hanging flexible joints," which absorb structural deformation stress while ensuring a connection safety factor of 1.8 or above between hollow-out components and the main building.

From the translucent concrete project at Century Plaza on Nanjing East Road to the irregular-shaped decoration of the Dongguan Women and Children's Activity Center, Qinglong Group has, with 28 years of technical accumulation, perfectly integrated the structural safety and artistic expression of UHPC hollow-out components. Looking ahead, as the industry standard "General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC)" advances, Qinglong will continue to uphold its values of "honesty, striving, trust, and collaboration," providing more innovative solutions for "aesthetic architecture" in the field of architectural decoration, allowing UHPC materials to showcase the dual charm of technology and art in more landmark projects.