GRC Raw Material Composition Analysis — Scientific Formulation of Qinglong GRC Materials

GRC mainly consists of five components: cement (30%-35%), aggregate (35%-40%), fiber (4%-5%), water (18%-22%), and additives (2%-3%). Premium GRC uses Grade 52.5 low-alkali cement (alkali content ≤0.6%), selected quartz sand (mud content ≤0.5%), alkali-resistant glass fiber (zirconia content ≥16.5%), and high-range water reducer (water reduction rate ≥20%). Through careful material selection and scientific proportioning, Qinglong GRC delivers product performance that exceeds national standards.

Mix parameters: cement-sand ratio 1:1-1:1.2, water-cement ratio 0.3-0.35, fiber volume fraction 4%-5%, additive dosage 0.5%-1%. Comparative tests by a testing institution show that after mix proportion optimization, Qinglong GRC achieved a 15% increase in flexural strength and a 20% improvement in durability.

Cementitious Material System

Low-alkali sulfoaluminate cement with alkali content ≤0.6%; optimized admixtures (fly ash, silica fume); strictly controlled specific surface area (≥350m²/kg); freshness requirement (≤15 days). Cementitious materials determine the performance foundation.

Aggregate Gradation Optimization

Quartz sand with SiO₂ content ≥96%; continuous gradation with fineness modulus 2.3-2.6; mud content ≤0.3%, free of harmful substances; particle shape close to spherical. Aggregate optimization improves density.

Fiber Reinforcement

Alkali-resistant glass fiber with zirconia content ≥16.5%; length 10-12mm, diameter 13-15μm; tensile strength ≥1700MPa; elastic modulus ≥70GPa. Fiber reinforcement improves toughness.

Chemical Additive Selection

High-range water reducer with water reduction rate ≥20%; retarding components control setting time; defoamers improve surface quality; strengthening agents enhance early strength. Admixtures optimize workability.

Quality raw materials are the foundation of quality. Qinglong GRC selects materials rigorously to ensure outstanding product performance.