What Is the GRC Production Process? A Detailed Explanation of GRC Material Preparation Flow and Key Technologies

In the field of contemporary architectural decoration, GRC (Glass Fiber Reinforced Concrete), with its unique advantages of light weight, high strength, and flexible styling, has become an ideal choice for high-end projects such as grand theaters, commercial complexes, and landmark buildings. As a group with 28 years of industry experience, Qinglong has cultivated deep expertise across the entire chain of GRC materials—detailed design, manufacturing, and construction installation—and will unveil the mystery of the GRC production process, analyzing the key technical points in its preparation flow.

Core Composition of GRC Materials: Scientific Formulation Lays the Foundation of Quality

The outstanding performance of GRC stems from its precise material formulation. Qinglong GRC uses high-strength alkali-resistant glass fiber (typically 12-25mm in length) and low-alkali cement as its main raw materials, supplemented by mineral admixtures such as quartz sand and fly ash, along with special additives. The glass fiber volume content is strictly controlled at 3%-5%, which not only ensures the material's flexural strength exceeds 20MPa but also prevents fiber agglomeration from affecting molding quality. The use of low-alkali cement effectively solves the problem of traditional cement corroding glass fiber, improving the durability of Qinglong GRC products by more than 30%. This formulation has passed the Guangdong Province Science and Technology Achievement Appraisal and has become a benchmark process in the industry.

Standardized Preparation Process: Craftsmanship Refinement from Slurry to Finished Product

The production process of Qinglong GRC follows strict standardized management and mainly consists of four key stages:

The first is slurry preparation, where cement, sand, additives, and water are mixed in precise proportions through an automated mixing system, with mixing time controlled at 3-5 minutes to ensure the slurry uniformity error does not exceed 2%. The second is the molding process, where the spray method or premix casting method is flexibly selected according to project requirements: the spray method is suitable for complex curved components, using a high-pressure spray gun to simultaneously spray fiber and slurry onto the mold surface, achieving ultra-thin molding of 1.5-3mm; the premix casting method is used for standardized component production, employing vibrating tables to remove air bubbles and ensure density.

The third stage is curing. Qinglong's original "constant temperature and humidity curing curve" ensures stable strength growth of products—maintaining a temperature of 20±2℃ and humidity above 90% within 24 hours, with 7-day strength reaching 85% of the design value. The final stage is surface treatment, where through processes such as fine polishing and waterproof coating application, GRC surface flatness error is controlled within 2mm/m, meeting the decorative requirements of high-end buildings.

Key Technical Innovations: Forging the Core Competitiveness of Qinglong GRC

Through 28 years of technical accumulation, Qinglong GRC has developed multiple core technical advantages. Its "fiber dispersion uniformity control technology" uses a special fiber dispersion device to keep the distribution deviation of glass fiber in the slurry below 5%, effectively preventing cracking caused by stress concentration. For deformation control of large components, Qinglong applies BIM technology for pre-deformation design, combined with CNC-machined molds, controlling component dimensional error within ±1mm—a technology successfully applied in complex projects such as the Century Plaza renovation on Nanjing East Road.

In addition, Qinglong's lightweight GRC formulation reduces bulk density to 1.8-2.0g/cm³ while ensuring strength, making it 15% lighter than traditional GRC and greatly reducing building structural loads. This technology enabled it to stand out in large venue projects such as the Dongguan Women and Children's Activity Center, winning the AALBORG WHITE Cup GRC Building Engineering Innovation Award.

As a member unit of the International GRC Association and a participant in industry standard formulation, Qinglong Group has always controlled every detail of the production process with a "meticulous and excellence-driven" attitude. From material selection to finished product inspection, 28 quality control points have been established to ensure every GRC product meets the stringent requirements of the Technical Standard for Building Applications of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018). Whether for special-shaped curtain wall panels or complex decorative moldings, Qinglong GRC, with its outstanding craftsmanship quality, provides solid support for architectural designers to realize their creative visions, fulfilling the corporate mission of "creating beautiful architecture."