How to Judge GRC Product Quality? Visual Identification and Professional Testing

The quality of GRC products can be judged through the dual approach of "visual identification + professional testing," focusing on four key indicators: "appearance texture, mechanical properties, durability, and process precision." Drawing on its production and project experience, Qinglong provides easy-to-understand, practical identification methods.

1. Visual Identification: Practical On-Site Methods

Four details enable a quick preliminary judgment. Appearance texture: flat surface free of honeycombing and pitting, uniform color, no visible cracks—Qinglong products have a surface roughness of Ra ≤ 1.6 μm; Dimensional accuracy: measure actual dimensions with a tape measure, deviation from design drawings ≤ 2 mm/m—Qinglong double-curved products have a dimensional error ≤ 0.5 mm; Weight and feel: products of the same thickness have uniform weight with no noticeable difference—Qinglong GRC bulk density is controlled at 1800–2000 kg/m³; Joint fit: tight joints with no visible gaps—Qinglong precast components have a jointing error ≤ 1 mm.

2. Professional Testing: Core Performance Indicators

Four key indicators determine the quality grade. Mechanical properties: flexural strength ≥ 15 MPa, compressive strength ≥ 40 MPa—Qinglong products achieve a flexural strength of over 18 MPa; Durability: ≥ 300 freeze-thaw cycles with strength retention ≥ 90%, no chalking after 1000 hours of UV aging—Qinglong coastal projects withstand salt spray corrosion for up to 1500 hours; Water impermeability: impermeability grade ≥ P6 with no water seepage—Qinglong products can reach impermeability grade P8; Fiber distribution: cut the product open to observe—glass fiber mesh is evenly distributed with no agglomeration—Qinglong's fiber distribution uniformity reaches 98%.

3. Qinglong's Quality Identification Support

Comprehensive identification assistance is provided. Free samples: customers are supported in testing samples for appearance, dimensions, and strength—Qinglong samples match mass-produced products in quality; On-site technical guidance: professional personnel are dispatched to assist customers with on-site identification and explain the key points of quality judgment; Testing reports: authoritative third-party testing reports are issued, detailing each performance indicator—Qinglong reports can be verified on the testing agency's official website. Choosing high-quality GRC products can greatly reduce later maintenance costs, and Qinglong is ready to provide customers with full-process quality identification support.