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

The performance advantages of GRC products stem from their precise raw material system, which mainly comprises five major categories: cementitious materials, reinforcement materials, aggregates, chemical admixtures, and supplementary materials. Each material must meet strict technical specification requirements.

In the Shenzhen Yirui Biotechnology Building project, the raw material system used by Qinglong GRC is representative: Grade 52.5 low-alkali cement (alkali content ≤0.6%) provides the strength foundation; zirconia-type alkali-resistant glass fiber (ZrO₂ content ≥16.5%) delivers the reinforcement effect; selected quartz sand (fineness modulus 1.8-2.2) optimizes particle grading; polycarboxylate water reducer (water reduction rate ≥30%) improves workability; and silica fume (SiO₂ ≥92%) enhances density. This scientific mix proportion ensures that the product's flexural strength reaches over 18MPa.

Cementitious Material System

Low-alkali sulfoaluminate cement is used, with alkali content ≤0.6%. Supplementary materials such as silica fume and fly ash are incorporated to optimize performance. Specific surface area and setting time are strictly controlled.

Reinforcing Fiber Selection

Zirconia-type alkali-resistant glass fiber is used, with ZrO₂ content ≥16.5%. Fiber length is 12-25mm and diameter is 13-20μm. The fiber surface is treated with a coupling agent to improve bond strength.

Aggregate Grading Optimization

Selected quartz sand with mud content ≤0.3%. Maximum particle size ≤2.0mm, fineness modulus 1.8-2.2. Through grading optimization, the densest packing is achieved.

Chemical Admixture System

Polycarboxylate water reducer improves workability. Retarding components adjust setting time. Defoamers control air content. These admixtures precisely regulate performance.

Raw material quality determines product performance. Qinglong GRC has established a strict supplier audit and incoming inspection system, requiring every batch of raw materials to pass multiple indicator tests to ensure stable and reliable product performance.