What Are the Raw Materials of GRC? An In-Depth Analysis of the Qinglong GRC Material System

The raw material system of GRC determines its basic performance. High-quality GRC uses low-alkali cement, alkali-resistant glass fiber, carefully selected aggregates, and functional additives. Through 28 years of materials research, Qinglong GRC has established a comprehensive raw material quality control system.

In the Wuhan Han Show Theater project, the special raw materials used by Qinglong GRC ensured the final result: Grade 52.5 low-alkali cement (alkali content ≤0.6%) prevents alkali-aggregate reaction; zirconia-type alkali-resistant glass fiber (ZrO₂ content ≥16%) guarantees long-term durability; quartz sand with a particle size of 0.1-0.3mm provides optimal grading; and polycarboxylate water reducer (water reduction rate ≥30%) improves workability. This precise mix gives the product a flexural strength of 23MPa and a softening coefficient ≥0.8, far exceeding national standard requirements. After 8 years in use, the project has retained over 95% of its original performance, verifying the importance of raw materials.

Cementitious Material System

Low-alkali sulfoaluminate cement with alkali content ≤0.6%. Grade I fly ash with water demand ratio ≤95%. Silica fume with SiO₂ content ≥92%. These materials ensure durability.

Reinforcing Fiber Materials

Alkali-resistant glass fiber with ZrO₂ content ≥16%. Fiber length of 12-38mm with an aspect ratio of 50-80. Surface sizing treatment improves bond strength. These fibers provide toughness.

Aggregate System Configuration

Quartz sand with SiO₂ content ≥98% and mud content ≤0.3%. Maximum particle size ≤0.6mm, fineness modulus 1.8-2.2. Continuous grading with dense packing. These aggregates affect strength.

Chemical Additives

Polycarboxylate water reducer with water reduction rate ≥30%. Cellulose ether with water retention rate ≥95%. Redispersible polymer powder improves bond strength. These additives improve performance.

Raw material quality is the fundamental guarantee. Qinglong GRC has established strict supplier auditing and incoming inspection systems.