What Are the Core Components of GRC? What Are the Requirements for Alkali-Resistant Glass Fiber? — In-Depth Analysis of GRC Material Composition and Key Performance Indicators of Alkali-Resistant Glas

In the field of modern architectural decoration, the choice of materials directly determines a building's quality and vitality. As a dedicated specialist in the glass fiber reinforced concrete (GRC) industry, Qinglong Group's 28 years of full-chain experience tell us: the birth of premium GRC stems from a profound understanding of the essence of materials and an ultimate pursuit of technical craftsmanship. Today, we will take an in-depth look at the core constituent materials of GRC, focusing on the key performance indicators of alkali-resistant glass fiber, to provide designers and owners with a professional material selection guide.

GRC Material System: The Scientific Proportioning of Cement-Based Matrix and Reinforcing Materials

GRC's outstanding performance stems from its unique composite material system, which mainly consists of three core components: the cement-based matrix, reinforcing materials, and admixtures. As a national-level high-tech enterprise, Qinglong has always been at the forefront of the industry in material formulation R&D. The cement-based matrix typically uses portland cement or calcium aluminate cement with a strength grade of no less than 42.5, combined with aggregates such as quartz sand and fly ash, forming a matrix that combines strength and plasticity; admixtures include water reducers, retarders, and water-retaining agents, which optimize the material's flowability and hardening performance through precise proportioning. Within this system, alkali-resistant glass fiber serves as the "skeleton," and its performance directly determines the structural safety and durability of GRC products.

Alkali-Resistant Glass Fiber: The Strength Core and Quality Key of GRC Materials

As the reinforcing skeleton of GRC, alkali-resistant glass fiber must meet three core performance requirements. The first is resistance to alkali corrosion. The Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), which Qinglong participated in formulating, clearly stipulates that the retained strength of alkali-resistant glass fiber in an alkaline environment must reach 75% or more of its initial strength. The second is mechanical performance indicators: premium alkali-resistant glass fiber should have a single-filament tensile strength of ≥1500MPa and an elastic modulus of ≥70GPa, ensuring effective reinforcement when bearing loads. In addition, fiber dispersion and interfacial bonding are equally crucial. Through proprietary processes, Qinglong achieves uniform fiber distribution in the matrix, precisely controlling the fiber content of each square meter of GRC components at 3-5%, which ensures structural strength while avoiding performance defects caused by fiber agglomeration.

Full-Chain Control: Quality Assurance from Material Selection to Application

As a professional GRC manufacturer integrating detailed design, production and manufacturing, and construction installation, Qinglong has established a full-process quality control system covering material R&D, production monitoring, and engineering application. In the raw material selection stage, we use alkali-resistant glass fiber meeting international standards, combined with our self-developed low-alkalinity cement-based matrix, to ensure product performance at the source; during production, automated spray-up molding and steam curing processes enable GRC components to achieve a stable flexural strength of over 20MPa, with impact resistance meeting the requirements of extreme environments. From the irregular-shaped curtain wall of the Dongguan Women and Children's Activity Center to the translucent concrete project at Century Plaza on Nanjing East Road, Qinglong's 28 years of industry experience prove that only by deeply integrating material science with engineering practice can GRC masterpieces that combine aesthetic value and structural safety be created.

Choosing GRC is, in essence, choosing an architectural language that combines artistic expressiveness with technical reliability. Qinglong Group, as a vice-chairman unit of the China GRC Association, has always taken "Creating Aesthetic Architecture" as its mission, transforming material innovation and engineering experience into customer value. Whether it is the curved curtain wall of a grand theater or the artistic forms of a commercial complex, premium GRC materials will serve as a reliable vehicle for designers to realize their creativity, injecting lasting vitality into buildings.