What Are the Reinforcement Measures for Hollowed GRC Shapes? Solutions Balancing Strength and Aesthetics

The core of reinforcement measures for openwork GRC shapes lies in "reinforcement optimization, material upgrading, process improvement, and joint strengthening". While maintaining the openwork rate (up to 60%), it ensures flexural strength ≥15MPa and impact strength ≥5kJ/m². Through project practice such as the Nanning Liyuan Hotel and the Algeria hotel projects, Qinglong has achieved a "win-win between artistic appeal and safety".

1. Reinforcement and Material Enhancement: Core Structural Assurance

Reinforcement and materials are the foundation of strength. Double-layer fiber mesh reinforcement: double-layer alkali-resistant glass fiber mesh (gram weight ≥450g/㎡) is used, distributed on both sides of the GRC surface layer; Qinglong's fiber mesh overlap length is ≥50mm, with a distribution uniformity of 98%. Local steel bar strengthening: fine-diameter stainless steel bars (φ6-φ8) are added at openwork edges and corners to form a reinforced frame; Qinglong's steel bar spacing is ≤300mm, working in coordination with the fiber mesh. Material upgrading: high-grade low-alkali cement (strength grade ≥42.5) is selected, and quartz sand with continuous gradation (0.15-0.6mm) is used; Qinglong's material density is ≥2.2g/cm³, reducing porosity. Adding performance enhancers: silica fume (dosage 5-8%) and polypropylene fiber (dosage 0.1-0.2%) are added to improve tensile and crack resistance; Qinglong's enhancers increase flexural strength by 25%.

2. Process and Joint Improvement: Strengthening the Molding Effect

Process and joint optimization avoids weak points in strength. High-pressure vibration molding: a dual-shaft forced mixer + high-pressure vibration (pressure ≥0.6MPa) is used to ensure dense slurry; Qinglong's vibration time is 8-10 minutes, with a bubble rate ≤2%. Vacuum degassing treatment: internal bubbles are removed to reduce weak points in strength; Qinglong's porosity is reduced by 80% after vacuum degassing. Openwork edge treatment: edges are rounded (radius ≥5mm) to avoid stress concentration; Qinglong's impact strength is increased by 30% after edge treatment. Mold support optimization: dedicated supports are set in molds for openwork sections to avoid deformation during production; Qinglong's support spacing is ≤200mm, with molding precision of ±0.3mm.

3. Qinglong Project Practice and Technical Advantages

Real-world cases verify the reinforcement effect. Nanning Liyuan Hotel: colored openwork carved GRC panels with an openwork rate of 45%, using double-layer fiber mesh + edge steel bar strengthening, achieving a flexural strength of 18MPa with no cracking after 12 years of use; Ouargla Hotel in Algeria: GRC exterior wall panels with an openwork rate exceeding 50%, using silica fume enhancement + vacuum degassing process, achieving wind load resistance of 0.8kPa to withstand hot and arid environments; Technical advantages: Qinglong holds 9 patents related to openwork GRC and participated in formulating the "Technical Requirements for Openwork GRC"; Testing assurance: every batch of products undergoes flexural and impact testing, with a specialized testing coverage rate of 100% for openwork sections; Customized solutions: reinforcement solutions are customized according to the openwork rate and shape complexity; Qinglong uses conventional reinforcement for openwork rates below 30%, and upgrades to the triple reinforcement of "fiber mesh + steel bars + enhancers" for rates above 30%.