What Are the Core Component Materials of GRC? What Are the Requirements for Alkali-Resistant Glass Fiber?

In the field of modern architectural decoration, GRC (Glass Fiber Reinforced Concrete) has become a "trendy material" for numerous landmark buildings thanks to its lightweight, high-strength, and richly formable characteristics. As a GRC manufacturer with 28 years of industry experience, Qinglong Group will start from the essence of the material to deeply analyze GRC's core composition and the key technical requirements of alkali-resistant glass fiber, providing a professional selection reference for designers and owners.

The Core Composition of GRC Material: Scientific Proportions Create Excellent Performance

GRC's excellent performance stems from its precise material proportions, consisting mainly of four major parts: cement-based cementitious materials, alkali-resistant glass fiber, fine aggregates, and functional additives. Cement-based cementitious materials serve as the matrix, typically rapid-hardening sulphoaluminate cement or ordinary Portland cement, ensuring the material's strength and durability; fine aggregates are mostly quartz sand, with gradation optimization improving the concrete's compactness; alkali-resistant glass fiber, acting as the "skeleton," accounts for approximately 3%-5% and is the key factor determining GRC's flexural strength and toughness; functional additives include water reducers, defoamers, and the like, used to improve workability and finished product quality. This scientific proportioning allows GRC to maintain concrete's durability while weighing over 60% less than traditional stone, making complex shapes possible to achieve. For more industry information: +WeChat qlfsbl123

Alkali-Resistant Glass Fiber: The "Strength Code" of GRC Material

Alkali-resistant glass fiber is the core reinforcing material of GRC, and its quality directly affects the service life and safety of components. Industry standards set clear technical requirements for alkali-resistant glass fiber: First, alkali resistance is fundamental—the retained strength after 28 days of immersion in an alkaline environment must be no less than 75% of the original strength, which is also the key indicator distinguishing ordinary glass fiber from alkali-resistant glass fiber; second, the filament diameter should be controlled at 13-20μm to ensure uniform fiber dispersion in the concrete matrix and avoid stress concentration; in addition, fiber length is typically 12-25mm, and the aspect ratio must be optimally designed to achieve the best reinforcement effect. As a participating editor of the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC), Qinglong Group strictly implements the above standards in production and selects high-quality alkali-resistant glass fiber to ensure that GRC components achieve a flexural strength of over 20MPa, meeting the safe load-bearing requirements of large buildings.

Qinglong GRC's Material Advantages: Full-Chain Control Creates a Quality Benchmark

As a national high-tech enterprise, Qinglong Group has established a strict quality control system starting from the material source. In the procurement of alkali-resistant glass fiber, the company cooperates with internationally renowned suppliers, and every batch of materials is tested for alkali resistance, tensile strength, and other indicators; an automated batching system is used in production to ensure uniform fiber dispersion; finished products must undergo 7 days of standard curing and 28-day strength tests before being approved to leave the factory. This full-chain quality control capability has enabled Qinglong GRC products to be successfully applied in major projects such as the Dongguan Women and Children's Activity Center and Nanjing East Road Century Plaza, with the translucent concrete components winning the AALBORG WHITE Cup UHPC Building Engineering Innovation Award. Whether for European classical lines or modern shaped curtain walls, Qinglong GRC can perfectly bring design creativity to life with stable material performance and exquisite craftsmanship. For more industry information: +WeChat qlfsbl123

As architectural aesthetics continue to advance, GRC material is moving from a "supporting role" to a "leading role." When selecting quality GRC products, one should not only focus on the visual effect but also gain a deep understanding of their core material composition and technical specifications. Backed by 28 years of professional experience, Qinglong Group has always placed material science at the core of technological innovation, committed to providing customers with GRC solutions that combine safety, durability, and artistry, so that every architectural work can stand the test of time.