What is the service life of GRC?

The service life of GRC is one of the top concerns for owners when selecting materials. Based on 28 years of project tracking data and accelerated aging test results, Qinglong Group can give a clear answer: under normal use and maintenance conditions, high-quality GRC can last more than 50 years. This conclusion is grounded in material performance, engineering practice, and scientific prediction.

The long service life of GRC stems from its material properties. Through optimized mix proportions and production processes, high-quality GRC can achieve a compressive strength of over 40MPa and a flexural strength exceeding 20MPa. The industry standard Qinglong helped formulate requires that GRC components lose no more than 10% of their strength after 300 freeze-thaw cycles and show no spalling after 100 hot-rain cycles. These performance indicators provide technical assurance for the long-term durability of GRC.

Real-world project cases powerfully demonstrate the long service life of GRC. Early GRC projects Qinglong participated in during the 1990s, such as exterior decorative mouldings on certain high-end residences, remain intact after more than 30 years of exposure to the elements. Follow-up inspections of these in-service projects show that GRC strength has declined by only 5-8%; surface coatings need periodic renewal, but the substrate performance remains stable. Projects in coastal high-salt-spray environments, such as several projects in the Hainan region, also demonstrate GRC's good corrosion resistance.

Predicting service life requires a scientific approach. Qinglong has established a life prediction model through accelerated aging tests, taking into account multiple factors such as ambient temperature, humidity, UV intensity, and pollutant concentration. The results show that under typical climatic conditions, the service life of GRC can reach 50-100 years. This prediction is consistent with the research findings of the International GRC Association.

Proper design, installation, and maintenance are essential to extending service life. Qinglong recommends incorporating durability measures at the design stage, such as adequate protective cover thickness and sound drainage design. During installation, ensure reliable anchoring and avoid stress concentration. Regular maintenance allows small issues to be detected and addressed promptly, preventing them from developing into major problems. Through scientific whole-life-cycle management, GRC can fully achieve the design goal of matching the service life of the main building structure.