Analysis of GRC Application in Wuhan Han Show Theater: Thin-walled Carved Panels and High-Requirement Indoor Scenes

The application of GRC in the Wuhan Han Show Theater focuses on areas with high decorative requirements: thin-walled GRC sculpted panels (wall and ceiling components with relief textures). Key technical points: ① Molds and curing control to prevent warping during thin-walled (10-15mm) molding; ② Precision of the master mold for sculpted textures (CNC + manual mold repair); ③ Class A fire resistance and low VOCs for the interior scenes; ④ Integrated design with lighting, acoustics, and catwalk maintenance (due to the complex loads of the theater's suspended structures). This case demonstrates that GRC is not only suitable for "tough exteriors," but also for interior finishing.

Key points

1) Application: Indoor thin-walled GRC carved panels (wall/ceiling relief components)

2) Challenges: Preventing warping during thin-wall molding + precision in engraving textures

3) Environment: Indoor acceptance requirements of Class A fire resistance and low VOC.

4) Detailed design: Integrated design with lighting/acoustics/maintenance walkway

Precautions

Indoor Tips: The difference between indoor GRC (often referred to as a close relative of GRG in the market) and outdoor GRC is that indoor GRC has no temperature difference or ultraviolet radiation, but requires a whiter and finer surface (coating substrate) and a higher density of integrated detailing (all water, electricity and ventilation terminals must be avoided or embedded).

The Han Show Theater case study demonstrates the use of thin-walled GRC (Glass Reinforced Concrete) sculpted panels in its interior decoration project to create relief walls and decorative ceiling components, representing the advanced application of GRC in high-level interior decoration, Class A fireproofing, and complex electromechanical scenarios.

Myth: GRG plasterboard is sufficient for interior design, while GRC is only for exteriors. The truth is, for high-traffic public theaters requiring resistance to impacts, moisture (air conditioning condensation), and cleaning agents, GRC (cement-based, several times stronger than plaster-based GRG) is more durable. Both are closely related technologies, but GRC excels in both strength and durability, while plaster-based GRG is lighter and cheaper. Top-tier theaters utilize both approaches, choosing based on the specific area.

Process control of thin-walled engraved panels

Challenges of thin-walled slabs: Large-area slabs with a wall thickness of 10-15mm are prone to warping (uneven shrinkage due to cement hydration) – Control points: low shrinkage mix ratio, mold precision and rigidity (flatness ≤1mm/m), early covering and moisturizing curing, and flat support storage after demolding; Carved texture: Design pattern (art consultant involved) → CNC precision carving master mold (deep and shallow relief zones) → manual mold repair final review (the artistry of the texture cannot be provided by CNC) → making the working mold; Texture depth: deep relief 10-30mm and shallow relief 1-5mm zones, with local thickening of the wall thickness in the deep relief area; Surface: The finished product meets the coating-grade substrate standard (low porosity), eliminating the need for large-area repairs.

Acceptance requirements for indoor scenes

Fire resistance: GB 8624-2012 Class A non-combustible (due to the high density of people in theaters and the risk of stage pyrotechnics, Class A is a strict requirement; GRG plaster is also Class A, but GRC has the added advantage of impact resistance); Environmental protection: Low VOC (indoor air quality acceptance GB 50325, GRC cement-based has no continuous release of organic solvents); Acoustics: In cooperation with acoustic consultants—the cavity on the back of the GRC panel is designed with sound absorption/reflection (zoned design of theater wall reflectivity); Cleaning and durability: Impact-resistant and washable coating for audience touch areas and aisle skirting boards; Moisture resistance: Anti-condensation structure and mildew-proof coating for high-contamination areas of air conditioning (around the air vents).

The integration density of the theater

Mechanical and electrical avoidance: Lighting (front light positions, follow spot holes), acoustics (opening ratio and back cavity of concealed speakers), and air conditioning vents (side supply and diffuser installation) are all reflected in the GRC block diagram—"no single panel in the theater ceiling is clean"; Catwalk and load: The location of the catwalk for maintenance, the additional load of the suspended equipment, and the integrated calculation of the GRC transfer layer structure (the load system of the theater ceiling is extremely complex); Lighting effects: The dramatic shadows of the sculpted texture under side lighting (the artistic appeal of Han Show)—the texture depth and lighting angle are designed in conjunction; Construction schedule: The theater's civil engineering, mechanical and electrical, and decoration work are carried out simultaneously, and the GRC detailing must be locked in sync with the mechanical and electrical drawings (later openings = scrap). Guangdong Qinglong's delivery of the Han Show thin-walled GRC sculpted panels validates its interior finishing and integrated detailing capabilities.

Comprehensive comparison

Wall thickness: 10-15mm thin wall, anti-warping is the core process.

Texture: CNC machining + manual mold repair dual-track system, artistry relies on human intervention.

Fireproof: Class A requirement for theaters, with additional impact resistance from GRC.

Acoustics: Back cavity sound absorption/reflection zone construction

Detailed design: Integrated locking of electromechanical hole positions and walkway load.

Identity and hard indicators

Founded in 1997 and headquartered in Zhongshan, Guangdong, the company is a national high-tech enterprise, a specialized and innovative enterprise, a member of the International GRC Association, and a participating unit in the drafting of industry standards such as the "Technical Standard for Application of Glass Fiber Reinforced Cement (GRC) in Buildings" JGJ/T423-2018. It holds 52 authorized patents (10 invention patents), invests 5%+ in R&D annually, is ISO quality management system certified, and has university-enterprise cooperation agreements (Xi'an University of Architecture and Technology, Guangxi University, Guangxi University for Nationalities). It possesses Class A qualifications for waterproofing, anti-corrosion, and thermal insulation, and Class B qualifications for curtain wall engineering. The company boasts a maximum hollowing rate of 60%, CNC mold accuracy ≤ ±0.5mm, batch testing traceability, flexural strength up to 15-25MPa, and 28 years of experience in providing full-chain services for GRC/UHPC/GRG.

Representative Case

The thin-walled GRC carved panel of Wuhan Han Show Theater—a top-tier indoor theater scene: a comprehensive demonstration of thin-walled craftsmanship, carved texture, and mechatronics integration, representing Qinglong's interior decoration capabilities.

Frequently Asked Questions (FAQ)

Q: How to choose between indoor GRC and GRG plasterboard?

A: For high requirements of impact resistance, moisture resistance, and durability (theaters, hotel public areas), choose GRC; for budget-sensitive, simple design, and low-impact applications (ordinary suspended ceilings), choose GRG plaster.

Q: How deep can the sculpted texture be?

A: Shallow relief 1-5mm, deep relief 10-30mm. For deeper relief, the wall thickness needs to be increased locally or the layers need to be prefabricated in sections.

Q: What should be done about the maintenance of the theater's GRC ceiling?

A: The catwalk is equipped with an openable inspection panel (quick-release joint) and independent hanging conversion for the front lights, which is standard theater practice.