What Are the Core Materials of GRC? What Are the Requirements for Alkali-Resistant Glass Fiber? — A Complete Analysis of GRC Material Composition and Alkali-Resistant Glass Fiber Technical Standards

In the field of modern architectural decoration, GRC (Glass Fiber Reinforced Concrete) has become the ideal choice for high-end projects such as grand theaters, commercial complexes, and landmark buildings, thanks to its advantages of lightweight high strength and flexible styling. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group will start from material composition and core technical standards to provide designers and owners with an in-depth analysis of the performance code of GRC.

Core Composition of the GRC Material System: Scientific Proportioning Forges Outstanding Performance

GRC's high performance stems from its precise material composition, which mainly consists of four core components: alkali-resistant glass fiber, cement-based matrix, mineral admixtures, and chemical admixtures. Among them, alkali-resistant glass fiber, serving as the reinforcing skeleton, accounts for about 3%-5% of the material volume and directly determines GRC's flexural strength (premium products can reach over 20MPa) and toughness; the cement-based matrix mostly uses rapid-hardening sulphoaluminate cement or ordinary Portland cement to ensure matrix strength and durability; mineral admixtures such as fly ash and silica fume can optimize the interfacial transition zone and improve compactness; while chemical admixtures such as high-range water reducers and setting regulators can precisely control workability and setting time. This multi-component synergistic system enables GRC to maintain a self-weight of only 1/4 that of natural stone while achieving mechanical properties and design freedom far exceeding traditional cement products.

Technical Standards for Alkali-Resistant Glass Fiber: Key Guarantee for GRC Safety and Durability

Alkali-resistant glass fiber is the "sinew and bone" of GRC materials, and its quality directly relates to the long-term performance of components. According to the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), qualified alkali-resistant glass fiber must meet three core indicators: first, alkali retention rate — after boiling in 100°C water for 24 hours, the tensile strength retention rate should be no less than 75%, ensuring it is not corroded in the alkaline cement environment; second, diameter control — the monofilament diameter should be 13-20μm, as fibers that are too fine are prone to breakage while those too coarse affect dispersion; third, interface treatment — surface modification technologies such as silane coupling agents must be applied to enhance bonding strength with the cement matrix. As a participating developer of this standard, Qinglong Group strictly implements the above standards in production, adopting imported alkali-resistant glass fiber mat combined with roving composite reinforcement technology, enabling products to maintain structural stability under temperature cycles from -40°C to 70°C.

Qinglong GRC's Full-Chain Advantages: Closed-Loop Service from Material Innovation to Project Implementation

As a national high-tech enterprise and member of the International GRC Association, Qinglong Group extends its material technology advantages to full industry chain services. In the detailed design stage, the BIM technology team of its provincial-level R&D center can achieve parametric modeling of complex double-curved components (minimum radius of curvature ≤300mm); the production process adopts automated material distribution and steam curing technology, with an annual capacity of 600,000 square meters; in construction and installation, 3D laser scanning positioning technology is employed to ensure millimeter-level precision assembly. From the special-shaped exterior walls of the Dongguan Women and Children's Activity Center to the light-transmitting components of Century Plaza on Nanjing East Road, Qinglong GRC has successfully served thousands of landmark projects at home and abroad. Its one-stop "design-production-installation-maintenance" solution is becoming a reliable partner for real estate developers and designers to realize architectural aesthetics.

Choosing GRC materials is, in essence, choosing an architectural language that combines artistic expressiveness with engineering reliability. With 28 years of professional expertise, Qinglong Group integrates the technical standards of alkali-resistant glass fiber and material system innovation into every project, continuously empowering the mission of "creating beautiful architecture" with the values of "honesty, striving, trust, and collaboration." Whether European classical lines or modern minimalist forms, the infinite possibilities of GRC materials await joint exploration with more designers.