Key Points Analysis of High-Strength GRC Panel Production Process and Quality Control Strategies

In the field of architectural decorative materials, GRC (Glass Fiber Reinforced Concrete) has become the preferred material for landmark buildings and high-end projects thanks to its lightweight, high-strength, and flexible shaping properties. However, the stability of product quality directly determines the safety and durability of a project. Qinglong Group, with 28 years of industry experience, has accumulated full-chain technical expertise in the production processes and quality control of high-strength GRC panels. This article analyzes the key control points and industry-leading practices, from material proportioning and molding processes to quality inspection.

1. Scientific Raw Material Proportioning: The Foundation of High-Strength GRC Panel Performance

The core advantage of high-strength GRC panels stems from precise control of the material system. Qinglong Group uses custom-grade rapid-hardening sulphoaluminate cement as the base material, combined with alkali-resistant glass fibers (content ≥5%) and selected quartz sand. The mix proportion is optimized through orthogonal experiments, enabling the product's flexural strength to consistently reach over 20MPa—30% higher than the industry average. In fiber dispersion technology in particular, German-imported mixing equipment achieves three-dimensional uniform distribution of glass fibers, avoiding the fiber clumping caused by traditional manual mixing and ensuring the uniformity of the panels' mechanical properties at the source.

2. Molding Process Innovation: Full-Process Control from Mold Design to Curing

Balancing complex shapes with structural strength is the core challenge in GRC panel production. Qinglong has introduced BIM parametric design and CNC engraving technology to achieve precision machining of irregular molds, with the minimum curvature radius controllable within 300mm, meeting the requirements of complex building skins such as double-curved surfaces and openwork reliefs. In the spray-up molding stage, high-pressure spray guns (pressure 0.6-0.8MPa) work synchronously with mechanical vibration to ensure slurry compactness reaches over 98%. The curing stage innovatively adopts a dual-stage process of "steam curing + natural curing", with 28-day compressive strength exceeding 80MPa and curing efficiency improved by 50% compared to traditional methods.

3. Quality Inspection System: Standardized Control Across the Full Life Cycle

As a contributing editor to the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), Qinglong has established a three-level inspection system covering raw materials, production processes, and finished product delivery. Each batch of panels must pass 12 indicator tests, including frost resistance (no cracks after 25 cycles from -20°C to 20°C) and weather resistance (strength loss ≤10% after 5,000 hours of UV aging), and is embedded with RFID chips for quality traceability. For installation, 3D laser scanning positioning technology ensures on-site splicing errors of ≤2mm, guaranteeing project quality across the entire chain from production to construction.

4. Industry Practice and Technological Breakthroughs: From Standard Setting to Engineering Verification

Backed by a national-level R&D center and 58 patented technologies, Qinglong continues to make breakthroughs in the field of high-strength GRC panels. For example, in the Dongguan Women and Children's Activity Center project, lightweight design (thickness of only 15mm) and optimized stiffening rib structures achieved ultra-large panels of up to 6m² each, improving installation efficiency by 40%. As a member of the International GRC Association, Qinglong will continue to drive industry technology upgrades. Guided by the philosophy of "meticulous craftsmanship and the relentless pursuit of excellence", it provides designers and owners with full-chain solutions from detailed design to after-sales maintenance, contributing to the perfect integration of architectural aesthetics and engineering safety.