Are Products from GRC Manufacturers Prone to Cracking? Cause Analysis and Preventive Measures

The beauty of architecture lies in the permanence of its details. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group understands the decisive role that material stability plays in building longevity. Recently, customers have frequently asked, "Do products from GRC manufacturers crack easily?"—a question that points directly to an industry pain point. Today, drawing on Qinglong's full-chain technical experience, we take an in-depth look at the core causes of GRC cracking and systematic prevention solutions, covering material properties, production processes, and construction maintenance.

Analysis of the Three Core Causes of GRC Material Cracking

As a new type of composite material, GRC (Glass Fiber Reinforced Concrete) does not crack due to inherent flaws in the material itself; rather, cracking is the result of failures across multiple stages. Based on the practice of the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), which Qinglong helped develop, approximately 80% of cracking issues stem from three critical stages: imbalanced material ratios, non-standardized production processes, and improper control of installation stress. Low-end manufacturers often use high-alkali cement to cut costs, causing alkali corrosion of the glass fibers and reducing the tensile strength of components by more than 30%. In contrast, Qinglong uses a low-alkali sulphoaluminate cement system combined with imported alkali-resistant glass fibers, which retain more than 90% of their mechanical properties after 500 freeze-thaw cycle tests.

Qinglong's Prevention System Built on 28 Years of Technical Accumulation

As a National High-Tech Enterprise, Qinglong has established a full-process quality control system covering "design–production–construction–maintenance." During the detailed design stage, BIM technology is used for stress simulation analysis, with truss-type reinforcement design applied to large-span components. In production, an automated spraying and molding process ensures fiber dispersion uniformity above 95%, while steam curing precisely controls the release of hydration heat. During installation, innovative 3D laser scanning positioning technology keeps errors within ±2mm, effectively avoiding internal stress caused by forced installation. This technical accumulation has enabled Qinglong GRC products to achieve a 15-year zero-cracking record in projects such as the Dongguan Women and Children's Activity Center.

Customized Anti-Cracking Solutions for Different Application Scenarios

To meet the specific requirements of different scenarios such as grand theaters and commercial complexes, Qinglong provides differentiated solutions. Exterior wall cladding panels adopt a "GRC + insulation layer" composite structure that absorbs temperature-induced deformation through flexible connection joints; landscape and garden components feature optimized reinforcement density with enhanced strengthening at corner areas; and European-style moulding products use a prefabricated embedded parts process to avoid thermal stress from on-site welding. These scenario-based solutions have enabled Qinglong GRC to successfully withstand extreme temperature differences from -15°C to 60°C in complex projects such as the Nanjing East Road Century Plaza renovation.

Choosing GRC materials is, in essence, choosing a complete technical assurance system. As a member of the International GRC Association, Qinglong consistently upholds a "meticulous and excellence-driven" attitude, transforming 28 years of engineering experience into replicable quality standards. From material formulations to construction techniques, and from project cases to industry standard setting, we believe: the crack resistance of high-quality GRC products stems from the relentless pursuit of every detail. To learn more about GRC application technologies, follow Qinglong Group's technical column, where we will continue to share cutting-edge industry solutions.