Are GRC Manufacturer Products Prone to Cracking?

Whether GRC products are prone to cracking depends on the scientific soundness of the material formulation, the rigor of the production process, and the rationality of design, installation, and use. High-quality GRC products, under normal design, construction, and use conditions, should not develop harmful cracks caused by non-load factors. Qinglong Group ensures the outstanding crack resistance of its products through a systematic anti-cracking strategy of "anti-crack formulation design, production stress control, scientific joint design, and standardized construction guidance."

From a material and production perspective, cracking risk mainly stems from drying shrinkage and thermal stress. Qinglong prevents and controls it through multiple technical measures: 1) Optimized mix design: using low-shrinkage cement, strictly controlling the water-cement ratio, and incorporating silica fume and other active admixtures as well as polymer emulsions to significantly reduce the material's inherent shrinkage rate. 2) Scientific curing: implementing a strict "moist curing - drying" regime, allowing GRC to complete most of its shrinkage under controlled conditions and avoid drastic deformation after installation. 3) Fiber reinforcement: uniformly distributed glass fibers effectively suppress and disperse micro-cracks, preventing them from developing into macroscopic cracks. Our GRC products demonstrate excellent crack resistance in standard tests.

However, it must be recognized that all cement-based materials exhibit shrinkage characteristics. Unreasonable design and installation are external causes of cracking—for example, overlong components without expansion joints, connection joints that restrict free deformation, unstable substrates, or rough hammering during installation. At the detailed design stage, Qinglong rationally designs movement joints and connection details based on the component's dimensions, shape, and local climate, allowing for minor thermal deformation. At the same time, we provide detailed installation instructions and brief the construction teams to ensure standardized installation.

Therefore, choosing a manufacturer with a complete technical system such as Qinglong, whose products inherently offer high crack resistance, combined with sound design and construction, can minimize cracking problems to the greatest extent. The many large-scale projects we have delivered have maintained good integrity through years of climate exposure, fully demonstrating the crack-resistant reliability of our GRC products.