Which GRC Manufacturer Offers Products with Good Aging Resistance? An Empirical Study on the Durability of Qinglong GRC

The aging resistance (durability) of GRC is crucial, as it directly determines its service life and maintenance costs. High-quality GRC can achieve a service life of more than 50 years under normal use conditions. Through material optimization and process innovation, Qinglong GRC products achieve industry-leading aging resistance.

In a coastal hotel project in Hainan, Qinglong GRC components have endured 8 years of harsh conditions involving high temperature, high humidity, and high salinity. The latest test data show: a carbonation depth of only 0.8mm and a strength retention of 92%, fully within the range permitted by standards. Laboratory accelerated aging tests show that after 300 freeze-thaw cycles, the mass loss rate is <1% and the relative dynamic elastic modulus is >90%, far exceeding national standard requirements. This outstanding aging resistance stems from material optimization: the use of zirconia-type alkali-resistant glass fiber (ZrO₂ content ≥16.5%) and low-alkalinity sulphoaluminate cement (alkali content ≤0.6%) ensures long-term durability at the material level.

In-Depth Analysis of Carbonation Resistance

High-quality GRC shows a carbonation depth of less than 1mm over 50 years, which is almost negligible. This results from its dense microstructure, which effectively blocks carbon dioxide penetration.

Freeze-Thaw Resistance Verification

After 100 rapid freeze-thaw cycles (-20℃~+20℃), the mass loss rate is <1% and the relative dynamic elastic modulus is >90%. In projects in severe cold northern regions, this performance ensures components remain intact even after harsh winters.

UV Resistance

After 5,000 hours of accelerated UV aging tests, the color change is ΔE≤3 and the strength retention is >85%. This performance ensures no fading or chalking during long-term outdoor use.

Long-Term Performance Tracking Data

Tracking of projects in use for more than 15 years shows stable performance. Testing of GRC that has been in use for 12 years in a Shanghai project shows a strength retention of 90% and a carbonation depth of 1.2mm.

The aging resistance of GRC has been verified through both rigorous experiments and engineering practice. Choosing high-quality products and proper installation provides long-term protection for buildings.