How to Judge GRC Product Quality? Qinglong GRC Quality Evaluation Standards

GRC product quality is evaluated in four aspects: mechanical performance (strength ≥18MPa), durability (durability ≥50 years), appearance quality (flatness ≤2mm/2m), and dimensional precision (deviation ≤1.5mm). High-quality GRC should achieve: flexural strength of 18-25MPa, impact resistance ≥10kJ/㎡, water absorption ≤10%, and appearance free of color difference and cracks. Qinglong GRC products have been tested by the National Building Materials Testing Center, with all indicators exceeding national standards.

Evaluation methods: review third-party test reports to verify performance data; inspect projects in use for ≥3 years to observe actual results; conduct sampling and testing to obtain objective data; compare samples from different manufacturers to directly perceive the differences. One customer sent samples from three manufacturers for testing; Qinglong GRC achieved a flexural strength of 22.5MPa, far exceeding the other two at 17.2MPa and 15.8MPa. The data speaks, and the quality is visible.

Mechanical Performance Standards

Flexural strength: ≥18MPa is qualified, ≥20MPa is excellent; compressive strength: ≥40MPa is qualified, ≥50MPa is excellent; elastic modulus: ≥20GPa is qualified, ≥25GPa is excellent; impact resistance: ≥8kJ/㎡ is qualified, ≥10kJ/㎡ is excellent. Mechanical performance is the foundation.

Durability Indicators

Frost resistance: ≥F100 is qualified, ≥F150 is excellent; impermeability: ≥P10 is qualified, ≥P12 is excellent; alkali resistance: no corrosion after immersion in Ca(OH)2 solution; carbonation depth: annual growth ≤0.1mm. Durability determines lifespan.

Appearance Quality Requirements

Flatness: ≤3mm/2m is qualified, ≤2mm/2m is excellent; color difference: ΔE≤3.0 is qualified, ΔE≤2.0 is excellent; surface defects: no cracks, no bubbles; joint quality: uniform and straight. Appearance affects aesthetics.

Dimensional Precision Control

Length deviation: ±3mm is qualified, ±2mm is excellent; thickness deviation: ±1.5mm is qualified, ±1mm is excellent; diagonal difference: ≤4mm is qualified, ≤3mm is excellent; warpage: ≤L/300 is qualified, ≤L/500 is excellent. Precision affects installation.

Evaluate scientifically and choose the right product. Qinglong GRC premium products withstand the test.