Which GRC Manufacturer's Products Have Good Aging Resistance? — Durability Technical Assurance System

The anti-aging performance of GRC products directly affects their service life. Quality products should be able to withstand environmental factors such as ultraviolet radiation, heat and humidity, and freeze-thaw cycles. Through accelerated aging tests and verification in actual projects, Qinglong Group believes that its GRC products can achieve a service life of more than 50 years in standard environments, thanks to a multi-layered protection technology system.

Material modification improves durability. Low-alkalinity cement is used to control alkali content at ≤0.6%. Active materials such as silica fume are added to refine the pore structure. The chloride ion diffusion coefficient of Qinglong GRC is ≤2.0×10⁻¹²m²/s, one order of magnitude lower than that of ordinary concrete. These measures enhance anti-aging capability at the material level.

Surface treatment provides additional protection. Protective coatings are selected according to the service environment; fluorocarbon coatings with a thickness of ≥30μm are used in coastal areas. A regular maintenance system ensures that the protective effect is sustained. In a Hainan project, GRC panels after 5 years of use were tested and showed performance degradation of less than 3%.

Design optimization reduces aging factors. Expansion joints are properly arranged to release thermal stress, and drainage design is optimized to prevent water accumulation. Through these systematic measures, product durability is significantly improved. Owners are advised, when making their selection, to pay attention to the manufacturer's durability design schemes and verification data.