Analysis of Key Production Process Points and Technical Essentials for High-Strength GRC Panels

In the field of contemporary architectural decoration, high-strength GRC panels have become an ideal choice for high-end buildings such as grand theaters and commercial complexes, thanks to their advantages of light weight, high strength, and flexible shaping. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group will start from the core aspects of the production process to provide an in-depth analysis of the technical essentials of high-strength GRC panels, offering professional reference for designers and owners.

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

The excellent performance of high-strength GRC panels begins with scientific raw material proportions. In production, Qinglong strictly selects high-grade sulphoaluminate cement as the base material, combined with alkali-resistant glass fiber (content no less than 4.5%) and selected quartz sand to form a composite reinforcement system. The glass fiber length is controlled at 15-25mm to ensure uniform dispersion in the matrix, achieving a flexural strength of over 20MPa, 30% higher than ordinary GRC. Meanwhile, by incorporating mineral admixtures such as nano-grade silica fume to optimize the interfacial transition zone structure, the product achieves a water absorption rate below 6% and withstands more than 300 freeze-thaw cycles, meeting application requirements under extreme climate conditions.

2. Forming Process: Digital Technology Empowering Precision Manufacturing

To meet complex shaping requirements, Qinglong adopts a production model combining dual processes of "spraying + premixing". For flat and simply curved components, automated spraying equipment achieves uniform coating of fiber and mortar; for special-shaped components such as double-curved and hollow-out structures, the premixing process is combined with mold vibration compaction to ensure structural density. Notably, Qinglong has introduced BIM technology and 3D scanning equipment, controlling design model precision to ±0.5mm and mold manufacturing errors to within 1mm, guaranteeing component dimensional accuracy from the source. Taking the Dongguan Women and Children's Activity Center project as an example, this process successfully achieved seamless splicing of single-curvature curtain wall panels, winning the Silver Award of the AALBORG WHITE Cup GRC Innovation Award.

3. Curing System: A Key Link in Full-Cycle Quality Control

The strength development and durability of high-strength GRC panels depend on scientific curing processes. Qinglong has established a dual-stage system of "static curing + steam curing": after forming, components first undergo 24 hours of static curing to ensure the stability of the cement's initial setting structure; they are then transferred to 60-80°C steam curing to accelerate hydration reactions, reaching 90% of the design strength within 7 days. During curing, an intelligent temperature and humidity control system monitors environmental parameters in real time, preventing cracking caused by internal-external temperature differences. In addition, Qinglong's proprietary "later-stage carbonation curing" technology raises the 28-day compressive strength of products to over 80MPa, 25% higher than traditional processes, further ensuring long-term performance.

4. Quality Testing: Building a Full-Chain Standardized Quality Control System

As a contributing editor of the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC), Qinglong has established a strict testing process. Each batch of products must pass 12 indicator tests, including flexural strength, elastic modulus, and impact resistance, with key items such as Barcol hardness required to reach 45 or above, ensuring compliance with the JGJ/T423-2018 standard. Meanwhile, RFID chip traceability technology has been introduced to record data throughout the entire process from raw materials to installation, making quality issues traceable. In the Nanjing East Road Century Plaza renovation project, Qinglong's light-transmitting GRC panels passed third-party testing with a light transmittance of 25% and mechanical performance meeting design requirements, winning the Silver Award of the UHPC Innovation Award.

From raw materials to finished products, the production of high-strength GRC panels represents a deep integration of materials science and engineering technology. With 28 years of technical expertise, Qinglong Group applies the philosophy of "meticulousness and the pursuit of excellence" throughout the entire production process, not only providing the market with high-quality GRC products but also helping designers bring their creative visions to life through full-chain services. Looking ahead, as new materials such as UHPC/GRC continue to advance, Qinglong will keep exploring process innovation, contributing to its mission of "creating beautiful architecture".