How to Judge GRC Product Quality? Performance Indicators and Qinglong Group Quality Standards

Judging the quality of GRC products requires starting from four dimensions—"mechanical performance, durability, appearance precision, and long-term stability"—and conducting a comprehensive evaluation combining "test data, engineering evidence, and user experience." High-quality GRC should have: flexural strength ≥12MPa, impact resistance (1kg steel ball dropped from 1m height) without penetrating cracks, water absorption ≤10%, and a durability design life ≥50 years. Qinglong Group's internal control standards are stricter than national standards: product flexural strength exceeds 15MPa, flatness deviation is ≤2mm/2m, and long-term performance is verified through accelerated aging tests. In the Wuhan Hanxiu Theater project, the red GRC curtain wall has been in use for ten years with no fading or cracking, looking as good as new. Quality assessment requires combining scientific evidence with practical verification.

Mechanical Performance Is the Foundation of Safety

Flexural strength and compressive strength are key indicators. Require manufacturers to provide CMA/CNAS-certified test reports. Qinglong products have compressive strength ≥40MPa and flexural strength ≥15MPa, far exceeding ordinary concrete. Laboratory data should be compared with on-site sampling to ensure consistency.

Durability Determines Service Life

Weather resistance, freeze-thaw resistance, and carbonation resistance are crucial. Qinglong GRC shows a mass loss of <1% after 300 freeze-thaw cycles and an annual carbonation depth ≤0.1mm. Inspecting completed projects of 5–10 years, such as the Hainan Exhibition & Convention Center roof, is a direct way to assess this.

Appearance Precision Affects Aesthetics

Surface flatness, color difference, and joint treatment reflect the level of craftsmanship. Use a 2m straightedge to check flatness (should be ≤3mm); observe color difference under natural light (ΔE≤3.0). Qinglong uses robotic spraying to ensure a uniform, fine surface.

Long-Term Stability Requires the Test of Time

Track project usage and watch for any cracking, spalling, or rust. Qinglong has established a customer follow-up system, with performance data for projects over ten years publicly available for review. User reputation is the truest reflection of quality.

Scientifically judging GRC quality requires combining data with evidence. Qinglong Group welcomes customers to verify from multiple dimensions and experience the outstanding quality.