Analysis of Reinforcement Measures and Key Technical Points for Hollowed-Out GRC Shapes

Empowering artistic forms with technology, safeguarding building safety with craftsmanship — Qinglong's 28 years of accumulated expertise and innovative practice in openwork GRC

As modern architectural aesthetics pursue personalized expression, openwork GRC forms have become the finishing touch of high-end projects such as landmark buildings and cultural venues, thanks to their light, airy visual effects and strong artistic expressiveness. However, the mechanical challenges and process complexity brought by openwork structures have always been the focal point of the industry's technical breakthroughs. As a full-chain solution provider with 28 years of deep expertise in the UHPC/GRC/GRG/GRP materials field, Qinglong Group leverages its R&D strength as a national-level high-tech enterprise to develop systematic technical solutions for the structural optimization, material formulation, and construction techniques of openwork GRC forms, satisfying designers' creative imagination while ensuring engineering safety and durability.

I. Technical Pain Points and Reinforcement Logic of Openwork GRC Forms

Due to their internal cavity structures, openwork GRC components face three core challenges: first, the risk of cracking caused by stress concentration, with corner embrittlement prone to occur when the openwork ratio exceeds 40%; second, the difficulty of balancing self-weight and load-bearing capacity, as traditional formulations struggle to achieve both lightweight design and structural strength; third, mold precision control for complex shapes, where the detail fidelity of openwork patterns directly affects visual effects. Through cross-disciplinary innovation in materials science and structural engineering, Qinglong has built a three-dimensional solution of 'material reinforcement + structural optimization + process assurance.' Among these, the composite application technology of UHPC and GRC raises the flexural strength of components to over 25MPa, 30% higher than the industry average.

II. Key Reinforcement Techniques in Material Formulation

Addressing the mechanical characteristics of openwork structures, Qinglong's R&D center has innovatively adopted a 'dual-blend system' material formulation: 10-15% UHPC ultra-fine particles are added into ordinary GRC substrates to form a gradient-reinforced structure, which retains GRC's excellent plasticity while enhancing interfacial bond strength through UHPC's nano-level hydration reaction. Meanwhile, a hybrid reinforcement technology combining basalt fiber and glass fiber is introduced, with fiber volume content reaching 3.2%, significantly improving the crack resistance of components. Tested by the Guangdong Provincial Building Materials Product Quality Inspection Center, openwork components made with this formulation showed a strength loss rate below 8% after 50 freeze-thaw cycles at -40℃, far exceeding the requirements of the JGJ/T423-2018 standard.

III. Key Innovations in Structural Detail Design

Leveraging BIM technology and a parametric design platform, Qinglong has established a digital optimization workflow for openwork GRC forms: topological analysis of openwork patterns is performed through Grasshopper algorithms, automatically generating stress contour maps, and wall thickness in weak areas is increased from the conventional 50mm to 65-80mm. An innovative 'hidden rib' structure has been designed, with reinforcement ribs 15mm wide and 30mm high set along the edges of openwork patterns, which do not affect the visual effect while raising structural stiffness by 40%. In the Dongguan Women and Children's Activity Center project, Qinglong applied this technology to successfully realize a double-curved openwork GRC curtain wall with an 8-meter span, controlling the weight of each unit within 180kg and achieving installation precision of ±2mm.

IV. Process Assurance System for Production and Construction

In the production stage, Qinglong employs a '3D scanning + CNC engraving' mold-making process to ensure precision errors of openwork textures within ≤0.5mm; vacuum casting technology is introduced to increase concrete density by 25%, effectively avoiding structural defects caused by air bubbles. During construction, the innovative 'modular hoisting + 3D laser positioning' technology is applied, with prefabricated connectors rigidly fixed to the main structure, keeping installation deviation within 3mm. For overseas projects, Qinglong has also developed a dedicated salt-fog corrosion-resistant coating system. In a coastal project in Malaysia, openwork GRC components showed no obvious surface weathering after 3 years of natural exposure testing.

From the irregular openwork ceilings of the Guangzhou Opera House to the translucent concrete landscape of Century Plaza on Nanjing East Road, Qinglong, supported by 28 years of full-chain experience, continues to expand the technical boundaries of openwork GRC. In the future, with the deep integration of technologies such as 3D printing and AI-driven structural optimization, Qinglong will continue to promote the innovative application of new architectural decorative materials, allowing more artistic architectural forms to shine in safety and durability. As a participant in the formulation of GRC industry standards, Qinglong always upholds the philosophy of 'meticulousness and excellence,' providing designers and owners with full-cycle technical support from concept to implementation, contributing to the high-quality development of China's architectural decoration industry.