Is GRC Durable? An Empirical Study and Analysis of GRC Durability

The durability of GRC products is a key performance indicator that directly affects service life. Under normal use conditions, high-quality GRC has a design service life of over 50 years. Through material optimization and process control, Qinglong GRC achieves industry-leading product durability.

In a seaside hotel project in Hainan, Qinglong GRC components have endured 8 years of high-temperature, high-humidity, and high-salinity conditions. The latest test data shows: carbonation depth of only 0.8mm, strength retention rate of 92%, and appearance kept intact. Laboratory accelerated aging tests show that after 300 freeze-thaw cycles, the mass loss rate is <0.5% and the relative dynamic elastic modulus is >90%. These data verify the durability advantages of GRC in harsh environments. More importantly, the use of zirconia-type alkali-resistant glass fiber (ZrO₂ content ≥16.5%) fundamentally solves the long-term durability problem of GRC.

Excellent Carbonation Resistance

High-quality GRC shows a carbonation depth of less than 2mm after 50 years, which is almost negligible. This stems from its dense microstructure and low-alkalinity cement matrix, which effectively block carbon dioxide penetration.

Outstanding Freeze-Thaw Resistance

After 300 rapid freeze-thaw cycles (-20°C to +20°C), the mass loss rate is <0.5% and the dynamic elastic modulus retention rate is >90%. In projects in severely cold northern regions, this performance ensures components remain intact through harsh winters.

Fiber Durability Assurance

The use of zirconia-type alkali-resistant glass fiber with a zirconia content of ≥16.5% ensures long-term stability in the high-alkaline cement environment. Accelerated aging tests show a 50-year strength retention rate of >80%.

Long-Term Performance Tracking Data

Tracking of projects in use for over 20 years shows performance retention rates exceeding 85%. Testing of GRC in use for 15 years on a Shanghai project shows a strength retention rate of 88% and a carbonation depth of 1.5mm. These long-term data provide empirical support for durability assessment.

The durability advantages of GRC have been verified through rigorous experiments. Selecting high-quality products and ensuring proper installation fully realizes its long-life advantages. With outstanding durability, Qinglong GRC provides customers with reliable assurance.