What Indicators Measure the Durability of Exterior Wall GRC Systems? — Qinglong Group Durability Evaluation System

The durability of GRC exterior wall systems must be scientifically evaluated through quantitative indicators. Based on 28 years of tracking data, Qinglong Group has established a three-tier evaluation system covering material performance, structural durability, and environmental adaptability, providing a basis for service life prediction.

Material performance is the foundation of durability. Compressive strength retention (≥80% at 28 years) and carbonation depth (annual growth rate ≤0.1mm) are key indicators. Through accelerated aging tests, Qinglong Group predicts that GRC can achieve a service life of over 50 years in standard environments. The chloride ion diffusion coefficient (≤2.0×10⁻¹²m²/s) reflects impermeability, while the number of freeze-thaw cycles (≥300 cycles) demonstrates frost resistance.

Structural durability focuses on system performance. Anchor fastener torque decay rate (≤5% per year) and sealant elasticity retention (≥70% at 10 years) reflect connection reliability. In long-term monitoring, Qinglong Group has found that high-quality GRC systems show an average annual joint width change of no more than 0.2mm, with panel surface flatness change ≤1mm per 10 years.

Environmental adaptability indicators include color difference (ΔE≤5), chalking grade (≤Grade 3), and others. Regular testing of these indicators enables accurate assessment of GRC exterior wall conditions and the development of scientific maintenance plans. Qinglong Group's durability evaluation system provides owners with a reliable basis for decision-making.