What Is the GRC Production Process? Standardized Workflow and Core Steps Explained

The GRC production process follows the standardized workflow of "raw material proportioning → mixing → molding → curing → demolding and finishing". Advanced processes and strict control are the core of product quality. Qinglong uses automated production lines and intelligent curing systems to ensure consistent performance of every product.

1. Raw Material Proportioning and Mixing: Precise Control is the Foundation

Raw material proportioning and mixing directly affect GRC performance. Mix design: personalized mixes are designed according to product use and environment, such as increasing fiber content for outdoor components and precisely controlling pigment ratios for colored components. Qinglong holds 58 patented formulas that can be adapted to different project requirements. Precise batching: an automated batching system is used, with proportioning errors for cement, fiber, aggregate, and additives kept within ≤±1%, avoiding fluctuations caused by manual batching. Mixing process: cement and aggregate are first dry-mixed evenly, then water and additives are added for wet mixing, and finally alkali-resistant glass fiber is added and mixed, with a total mixing time of 3-5 minutes to ensure uniform fiber dispersion. Qinglong's mixing equipment uses variable frequency technology, allowing mixing speed to be adjusted to suit different raw material characteristics.

2. Molding Process: Adapting to Different Shape Requirements

The molding process determines the shape accuracy and density of GRC. Common processes: spray-up molding, premix casting, and press molding. Spray-up molding is suitable for complex shapes, premix casting is suitable for flat panels and simple lines, and press molding is suitable for standardized mass-produced components. Qinglong's signature process: for double-curved and special-shaped components, the "BIM modeling → custom mold making → spray-up molding" process is adopted. The double-curved GRC components of the Guangxi New Media Center achieved a unique shape for each panel through this process, with dimensional accuracy of ≤±2mm. Key molding points: molding pressure and thickness are controlled to ensure product density ≥95% and avoid air bubbles and voids. Qinglong's molding equipment is equipped with vibration devices to reduce internal voids in products.

3. Curing, Demolding and Finishing: Ensuring Performance and Aesthetics

Curing, demolding, and finishing are key steps before products leave the factory. Curing process: constant temperature and humidity curing is adopted, with temperature controlled at 20-25℃ and humidity ≥90%, over a curing period of 7-14 days. Qinglong's intelligent curing rooms use PLC control systems to automatically adjust temperature and humidity, improving curing efficiency by 30%. Demolding timing: GRC is demolded when its strength reaches more than 70% of the design strength, avoiding deformation caused by premature demolding. Qinglong determines the demolding time through strength testing to ensure products are free of damage. Finishing treatment: after demolding, flash and burrs are cleaned off, surface defects are repaired, and color difference adjustments are made for colored components. Qinglong uses five-axis grinding equipment to precisely finish complex shapes, ensuring surface flatness of ≤0.5mm/m.