What Are the Raw Materials of GRC? 2024 Core Components and Material Selection Standards Explained

The quality of GRC stems from the scientific proportioning of premium raw materials. Its core raw materials fall into four major categories: cement, quartz sand, alkali-resistant glass fiber, and admixtures. As a participant in drafting industry standards, the Qinglong GRC manufacturer has established strict material selection criteria to ensure stable and outstanding product performance.

Core Raw Materials: The Basic Elements of GRC

Cement is the cementitious material of GRC. Qinglong uses high-grade white cement or ordinary Portland cement with a strength grade of ≥42.5 to ensure strength and durability. White cement is better suited to highly decorative components, such as the colored GRC panels of the Nanning Liyuan Hotel, which use a white cement matrix to achieve delicate color effects. Quartz sand, used as aggregate, is clean quartz sand with a particle size of 0.15-0.6mm; its hard texture and uniform particles enhance the density and wear resistance of GRC, as in the stone-imitating GRC components of the Dongting Lake Museum, where natural quartz sand achieves over 95% realism. Alkali-resistant glass fiber is the reinforcing material. Qinglong uses imported or high-quality domestic alkali-resistant glass fiber, with a fiber length of 12-24mm and a dosage of 3%-5%, which greatly improves the flexural and tensile strength of GRC and prevents cracking. Admixtures include water reducers, retarders, and waterproofing agents. Qinglong uses high-efficiency polycarboxylate water reducers to lower the water-binder ratio to below 0.35 and improve density; retarders are used to adjust setting time, while waterproofing agents enhance impermeability.

Qinglong's Material Selection Standards: Rigorous Control, Quality Traceability

Qinglong has established a "Triple Verification, Triple Selection" material selection standard to ensure raw material quality. First, verify qualifications: choose legitimate suppliers with production licenses and product test reports — for cement, well-known brands such as Conch and China Resources are selected; for alkali-resistant glass fiber, quality manufacturers such as Jushi and Taishan are chosen. Second, verify performance: every batch of raw materials must be tested before entering the plant; indicators such as cement strength, quartz sand mud content, and fiber alkali-resistance rate must meet standards, and substandard raw materials are resolutely rejected. Third, verify stability: suppliers with stable supply and a good reputation are given priority, and long-term partnerships are established to ensure consistent raw material performance. In addition, Qinglong implements full traceability of raw materials, recording batch information for each batch of products to facilitate quality tracing. For example, the GRC curtain wall panels of the Panzhihua project in Sichuan have complete raw material traceability information, ensuring performance meets the requirements of more than 20 years of use.

Raw Material Proportioning: Scientific Blending, Optimized Performance

Premium raw materials can only deliver the best results through scientific proportioning. With 58 patented technologies, Qinglong optimizes the proportioning of GRC raw materials. The mix is adjusted according to product use: decorative components increase the proportion of white cement to improve surface finish; load-bearing components increase fiber dosage and cement grade to enhance strength; components with high impermeability requirements add an appropriate amount of waterproofing agent to raise the impermeability grade. For example, the GRC components of the Shanghai Qingpu R&D and production project optimized the mix to reduce harmful substances in line with the environmental requirements of the high-tech park, achieving inorganic eco-friendly characteristics; the double-curved GRC panels of Hainan Poly Peninsula No. 1 improved shaping capability and structural stability by adjusting fiber distribution and aggregate gradation. Scientific proportioning allows Qinglong GRC products to achieve a perfect balance in strength, durability, and decoration.

The quality of GRC raw materials directly determines product performance. Building on premium core raw materials, the Qinglong GRC manufacturer creates outstanding products through strict material selection standards and scientific proportioning. Understanding the composition and selection standards of GRC raw materials helps customers better judge product quality; only by choosing a manufacturer like Qinglong that emphasizes raw material control can you obtain reliable GRC products.