What Are the Raw Materials of GRC? A Comprehensive Analysis of GRC Component Composition and Properties

With its lightweight yet high-strength properties, GRC material is redefining the boundaries of architectural decoration. Qinglong Group, with 28 years of industry experience, will start from the essence of the material to reveal the core components and outstanding performance of GRC components.

In the field of modern architectural decoration, GRC (Glass Fiber Reinforced Concrete) has become the preferred material for high-end projects such as grand theaters, commercial complexes, and landmark buildings, thanks to its unique material advantages. However, many designers and owners still lack a systematic understanding of the raw material composition of GRC. Drawing on Qinglong Group's 28 years of full-chain practical experience, this article provides an in-depth analysis of the main components of GRC components and their characteristics, offering a professional reference for the industry.

GRC Raw Material System: Scientific Proportioning of Four Core Components

The performance of GRC components depends on the scientific proportioning of their raw materials, which mainly consist of four core components: glass fiber, cement-based materials, aggregates, and admixtures. As a participating unit in drafting the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), Qinglong Group has accumulated rich experience in raw material selection and proportioning. Among these, glass fiber serves as the reinforcing material, typically accounting for 3%-5%; alkali-free glass fiber with excellent alkali resistance must be selected to ensure the long-term durability of the components; cement-based materials mostly use high-grade Portland cement or sulphoaluminate cement to provide basic strength for the components; aggregates use quartz sand or river sand, with particle size controlled between 0.15-2.5mm to ensure the material's density and plasticity; admixtures include water reducers, retarders, and others, used to optimize construction performance and mechanical indicators.

Analysis of Key Component Properties: Why Qinglong GRC Components Are More Competitive

As the "skeleton" of GRC, glass fiber directly determines the flexural strength and toughness of the components. Qinglong GRC uses imported alkali-resistant glass fiber, which, after special surface treatment, achieves a 30% improvement in bonding strength with the cement matrix, enabling component flexural strength to reach over 20MPa, far exceeding the industry average. In cement-based material selection, Qinglong composites cement with mineral admixtures through a patented formula (Invention Patent No.: ZLXXXXXX), which both reduces hydration heat and improves durability, making it especially suitable for regions with large temperature differences. In aggregate grading, Qinglong employs a three-grade sand technology, reducing material porosity to below 8% and effectively improving impermeability. The admixture system is independently developed by Qinglong's provincial-level R&D center and can precisely adjust setting time and fluidity according to project requirements, meeting the casting requirements of complex shapes.

Raw Material Control: The Core Link of Qinglong's Full-Chain Quality Control System

As a national "Specialized, Refined, Distinctive, and Innovative" enterprise, Qinglong has established a full-process quality control system from raw material procurement to finished product delivery. At the Nanning production base, all incoming raw materials must pass the "Three-Inspection System" (self-inspection, mutual inspection, and special inspection), in which glass fiber must undergo an alkali resistance retention test (≥75% for qualification) and cement must be tested for 28-day compressive strength (≥52.5MPa). During production, Qinglong uses an automated batching system with proportioning accuracy controlled within ±1%, and realizes raw material traceability management through the ERP system. This strict raw material control has enabled Qinglong GRC components to achieve outstanding performance with no cracking or deformation for 15 years in projects such as the Dongguan Women and Children's Activity Center, winning the AALBORG WHITE Cup GRC Construction Engineering Innovation Award.

Raw Material Innovation: Qinglong's Practice in Advancing GRC Material Upgrading

As architectural design demands ever-higher material performance, Qinglong continues to invest in raw material innovation. In recent years, by combining UHPC (Ultra-High Performance Concrete) technology with GRC, Qinglong has developed high-performance GRC composite components with flexural strength exceeding 35MPa and weight reduced by 15% compared to traditional GRC, which have been successfully applied in the Nanjing East Road Century Plaza renovation project. Meanwhile, Qinglong is exploring the application of industrial solid waste in GRC and has currently achieved a technical breakthrough with a fly ash content of 20%, which both reduces costs and puts environmental protection concepts into practice. These innovative practices demonstrate Qinglong's strength as an industry technology leader.

A deep understanding of GRC raw materials is the foundation for correctly selecting and applying this material. With 28 years of technical accumulation, Qinglong Group not only provides the market with high-quality GRC components but is also committed to spreading professional knowledge, helping designers and owners bring their creative ideas to fruition. In the future, Qinglong will continue to focus on the innovative development of UHPC/GRC/GRG/GRP materials, striving persistently toward the mission of "Creating Beautiful Architecture".