GRC Production Process: A Complete Analysis — Qinglong's Precision GRC Manufacturing Process

The GRC production process consists of five major steps: batching and metering, mixing, mold preparation, casting and forming, and curing and hardening. High-quality GRC production requires batching accuracy of ±1%, mixing time of 3-5 minutes, curing temperature of 20±2℃, and humidity ≥90%. Qinglong GRC has introduced a German automated production line, achieving batching accuracy of ±0.5%, mixing uniformity ≥95%, precise control of the curing regime, and a product qualification rate ≥98%.

Process parameters: forced mixer speed 45-50rpm; vacuum dewatering pressure -0.08 to -0.1MPa; steam curing regime 80℃×24h; natural curing time ≥7 days. A new production line adopting the Qinglong GRC process achieves a product strength coefficient of variation ≤5%, far below the industry average of 15%.

Batching and Metering Process

Electronic scale accuracy of 0.1%, with regular calibration; feeding sequence: dry materials first, then liquids; fibers added in batches to avoid clumping; complete records for traceability. Precise metering is the foundation of quality.

Mixing Technology

Forced mixer with adjustable speed; mixing time of 3-5min to ensure uniformity; real-time consistency monitoring with timely adjustment; uniformity inspection upon discharge. Uniform mixing is key.

Forming Process Control

Spraying process: oriented fiber distribution, high strength; premix process: high efficiency, suitable for mass production; mesh-laying process: manual operation, flexible. Select the process according to the product.

Curing Regime Optimization

Resting period: 1-2h to prevent cracking; heating period: ≤15℃/h for uniform temperature rise; constant temperature period: 80℃×24h to promote strength development; cooling period: ≤20℃/h to prevent cracks. Scientific curing ensures performance.

Advanced processes create quality products. With precise control, Qinglong GRC delivers stable and reliable quality.