هل GRC متين؟ دراسة عملية لمتانة تشينغلونغ لـ GRC

Durability is a key indicator for evaluating GRC quality and determining its engineering service life. Based on accelerated aging tests and 28 years of engineering tracking data, high-quality GRC is expected to have a service life of more than 50 years under normal use conditions. Through systematic material optimization and process control, Qinglong GRC has achieved industry-leading product durability.

In a commercial building in Shenzhen completed 15 years ago, testing of Qinglong GRC curtain wall panels showed: a carbonation depth of 0.8mm, a flexural strength retention rate of 92%, and no surface weathering or spalling. Based on this aging rate, the remaining service life still exceeds 35 years. In a coastal project in Hainan, after 10 years of exposure to the marine environment, the chloride ion penetration depth was only 1.2mm, with an expected service life of up to 40 years. These empirical data provide a scientific basis for GRC's long-term performance. More importantly, with regular maintenance and protective treatment, the service life can be extended by more than 30%.

In-Depth Analysis of Carbonation Resistance

High-quality GRC carbonates extremely slowly, with an annual carbonation depth of ≤0.1mm. By using low-alkali cement (alkali content ≤0.6%) and incorporating active admixtures, the alkalinity of the pore solution is effectively reduced, slowing the carbonation process. The predicted 50-year carbonation depth does not exceed 5mm, ensuring the internal reinforcement remains free from corrosion over the long term.

Freeze-Thaw Resistance Verification

After 300 rapid freeze-thaw cycles, the mass loss rate is <0.5% and the relative dynamic elastic modulus is >90%, far exceeding national standard requirements (mass loss ≤5%, dynamic elastic modulus ≥60%). In projects in northern regions, this performance ensures components remain intact even through harsh winters.

Heat and Humidity Aging Resistance

In an accelerated aging environment at 40°C and 95% relative humidity, after 1,000 hours of testing, the surface shows no cracking or powdering. This performance makes GRC particularly suitable for use in rainy southern regions. In a landmark building in Guangzhou, GRC components have remained stable through 10 years of hot and humid climate.

Long-Term Performance Tracking Data

Tracking of GRC projects in service for more than 15 years shows that material performance remains stable. In a commercial complex in Shenzhen completed 12 years ago, tested GRC decorative components showed a strength retention rate of 98% and a surface color change of ΔE≤3.2. These long-term data provide strong proof of GRC's durability.

The durability advantages of GRC have been verified through both rigorous testing and engineering practice. Choosing high-quality GRC products and installing them correctly ensures long-term safe use of the project.