What Are the Characteristics of the Material Mix Ratio for Lightweight GRC Shapes?

Lightweight GRC shapes achieve a density reduced to 1.2-1.5g/cm³ through optimized mix proportions, while maintaining strength ≥30MPa. Qinglong Group uses microbead lightweight aggregates, chopped fibers, and high-efficiency water reducers to significantly reduce weight while ensuring performance.

Lightweight aggregates are key to weight reduction. Hollow glass microbeads (particle size 50-100μm, density 0.2g/cm³) are added to replace 30%-40% of quartz sand. In ceiling projects, this mix reduces panel weight by 35% and improves installation efficiency by 50%. Fiber length is optimized to 6-12mm with a 2% volume fraction, ensuring the reinforcement effect is not compromised.

The water-binder ratio is precisely controlled at 0.32-0.35, with polycarboxylate water reducer added (dosage 1.2%) to ensure workability. The steam curing regime is adjusted: temperature lowered to 50℃ and duration extended to 36h to avoid microbead damage. Through material innovation, a breakthrough in GRC lightweighting is achieved.