What is the GRC Production Process? A Complete Analysis of Qinglong's GRC Manufacturing Process

The GRC production process directly affects product performance and consistency. High-quality GRC uses processes such as spraying, premixing, and mesh laying, selecting the optimal solution according to product requirements. Through 28 years of process optimization, Qinglong GRC has developed a precise production system.

In the Comprehensive Service Center project of Shenzhen Pingshan High-tech Zone, Qinglong used an improved spraying process to produce double-curved GRC panels: robotic automatic spraying controlled the fiber content at 4.5%-5%, with a distribution uniformity of over 95%; vacuum dewatering reduced the water-cement ratio to 0.30, improving density; low-temperature steam curing (65℃±2℃) optimized strength development. This process achieved a flexural strength of 25MPa, with the strength variation coefficient controlled within 5%. The online inspection system used in the project monitored process parameters in real time to ensure stable product quality. This precise control kept the dimensional error of tens of thousands of shaped panels within ≤2mm.

Batching Process Control

The electronic weighing system has a precision of ±0.1%. Dry materials are premixed for 2 minutes to ensure uniformity. Fibers are added in three batches to prevent clumping. The water-cement ratio is controlled at 0.30-0.33. These controls ensure accurate mix proportions.

Forming Process Selection

The spraying process offers good fiber orientation and is suitable for complex components. The premixing process is highly efficient and suitable for standard panels. The mesh laying process enhances directionality and is suitable for special areas. Each of these processes has its own advantages.

Curing Regime Optimization

A resting period of 2-3 hours prevents plastic cracking. A heating rate of ≤15℃/h avoids thermal stress. Constant-temperature curing for 24 hours ensures strength development. A cooling rate of ≤20℃/h prevents shrinkage cracking. This regime optimizes performance.

Post-Processing

Water curing for 7 days after demolding promotes strength development. Surface treatment improves durability. Quality inspection covers 100% of products. These procedures ensure factory quality.

Advanced processes require precise control. Qinglong GRC ensures process stability through automated production lines.