Are Products from GRC Manufacturers Prone to Cracking? Material Properties and Process Control Solve the Cracking Problem

"Are products from GRC manufacturers prone to cracking?" This is one of the biggest concerns for many project developers when selecting GRC materials. Cracking not only affects the aesthetic appearance of a building but may also reduce the product's structural strength and service life, and even pose safety hazards. In fact, whether GRC products are prone to cracking depends on multiple factors such as material properties, production processes, installation, and later-stage maintenance. As a professional manufacturer with 28 years of deep experience in the GRC industry, Qinglong Group analyzes the cracking issues of GRC products and their solutions from multiple dimensions, including material R&D, process optimization, and installation standards.

Essential properties of GRC materials: inherent crack resistance advantages. GRC (Glass Fibre Reinforced Concrete) is a new type of building material composed of alkali-resistant glass fibres and cement-based materials, and one of its core advantages is crack resistance far exceeding that of ordinary cement products. Alkali-resistant glass fibres feature high strength and high elastic modulus; uniformly distributed in the cement-based material, they can effectively disperse stress and inhibit the initiation and propagation of cracks. In terms of material properties, high-quality GRC products offer crack resistance far superior to traditional concrete components. As long as production and application are properly carried out, cracking can be effectively avoided. Qinglong Group uses high-grade alkali-resistant glass fibres and, through precise control of fibre content (typically 3%-5%), further enhances the crack resistance of its products, laying a material foundation for solving cracking problems.

Production process control: the core link in solving cracking. Many cracking problems of GRC products stem from non-standard production processes. A reliable GRC manufacturer will avoid cracking risks at the source through refined process control. During production, Qinglong Group focuses on three key stages: first, optimization of raw material proportions—scientifically proportioning cement, aggregates, admixtures, and water to improve the workability and density of the cement-based material and reduce shrinkage cracks; second, mixing and molding processes—using mechanical mixing to ensure uniform distribution of glass fibres, avoiding localized stress concentration caused by fibre clumping, while controlling molding pressure and speed to reduce internal porosity; third, curing processes—adopting standard curing regimes and controlling curing temperature and humidity to avoid shrinkage cracking caused by rapid early water loss or excessive temperature changes. Qinglong Group's standardized curing workshops ensure that GRC products steadily gain strength during the curing period, effectively reducing cracking risk.

Installation standards: key to avoiding later-stage cracking. Many cases of later-stage cracking in GRC products are closely related to non-standard installation. For example, excessive spacing between fixing points or insecure anchoring during installation can cause uneven stress on products; improper joint treatment can produce cracks due to temperature changes or structural deformation; failure to set expansion joints or excessive spacing between them can prevent the release of shrinkage stress. During installation, Qinglong Group strictly follows the requirements of the Technical Standard for Building Applications of Glass Fibre Reinforced Cement (GRC) (JGJ/T423-2018), uses BIM technology for installation simulation, precisely locates fixing points, and ensures fixing point spacing complies with standard requirements; joint treatment uses elastic sealing materials with sufficient expansion space reserved; expansion joints are reasonably set according to the project environment and component length to effectively release thermal and shrinkage stress. For example, in the GRC curtain wall project at Xiangshan Science and Technology Park in Longhua, Shenzhen, the Qinglong team ensured the project remained crack-free over years of use through standardized installation and joint treatment.

Product design optimization: reducing cracking risk at the source. The soundness of GRC product design also affects the probability of cracking. A reliable GRC manufacturer will fully consider crack resistance requirements at the design stage and optimize the product structure. During detailed design, Qinglong Group's design team sets stiffening ribs and anchoring points reasonably based on component dimensions, loading conditions, service environment, and other factors to avoid stress concentration at weak points; for oversized or complex-shaped components, segmented design and modular production are adopted to reduce overall shrinkage stress; glass fibre content is appropriately increased at crack-prone areas to enhance local crack resistance. For example, in the design of the 15mm ultra-thin GRC carved panels for the Han Show Theatre in Wuhan, optimized stiffening rib layout and fibre distribution ensured the products retained excellent crack resistance despite their complex shapes and ultra-thin thickness.

Later-stage maintenance and service environment: safeguarding extended service life. The service environment and later-stage maintenance of GRC products also affect cracking. Under extreme temperature differences, high humidity, or corrosive environments, improper maintenance may lead to product performance degradation and cause cracking. Qinglong Group provides customers with comprehensive after-sales maintenance services, regularly following up on project usage and guiding customers in daily maintenance—for example, avoiding impacts from sharp objects, promptly cleaning surface stains, and checking sealant aging and replacing it in time. Meanwhile, Qinglong GRC products have passed weather resistance testing and can adapt to different climates, maintaining stable performance in tropical, frigid, and various other environments, effectively reducing cracking risk caused by environmental factors.

Products from quality GRC manufacturers are not prone to cracking. Through the inherent advantages of material properties, refined production process control, standardized installation practices, optimized product design, and scientific later-stage maintenance, cracking problems can be effectively solved. With 28 years of industry experience, Qinglong Group has accumulated rich expertise in GRC crack resistance technology, and its products have been verified through long-term use in thousands of major projects with an extremely low cracking rate. For project developers, choosing a GRC manufacturer with technical strength and standardized services can effectively avoid cracking risks and ensure long-term stable product use.