How to Judge GRC Product Quality? Four Intuitive Methods + Professional Indicators Explained

Judging the quality of GRC products requires no complex equipment. Through four intuitive methods—"visual inspection, touch testing, simple testing, and specification verification"—combined with professional testing indicators, you can make a comprehensive judgment and avoid inferior products with insufficient strength, easy cracking, and poor durability. Qinglong, as a premium GRC manufacturer, has summarized a practical quality assessment guide to help users quickly screen out high-quality products.

Intuitive Check 1: Visual inspection—see if details meet standards. The appearance of premium GRC products should satisfy three major requirements of "flat, defect-free, and uniform texture": 1. Surface flatness: place a 2m straightedge against the surface; gaps should be ≤2mm, with no bulges or depressions. Qinglong's GRC products have a flatness tolerance of ≤±1.5mm/m; 2. No obvious defects: no cracks (including micro-cracks), chipped edges or corners, air bubbles, or pinholes. Premium products have a smooth, fine surface, while inferior products tend to have dense pinholes and damaged edges and corners; 3. Texture and color: textures imitating stone or wood should have a fidelity of ≥95%, with uniform, consistent color and no obvious color difference. Qinglong's GRC stone-imitation components achieve a texture fidelity of over 95%, and the color is treated for UV resistance to remain fade-free over time. In addition, check the edges of the components: premium products have neat edges without burrs, while inferior products have rough edges that crumble easily.

Intuitive Check 2: Touch—feel the texture and density. Touch the surface and edges of GRC products by hand; premium products should feel "smooth, solid, and free of looseness": 1. Surface feel: smooth and fine, with no granular or sandy texture; inferior products feel rough due to improper aggregate grading; 2. Weight: for the same size, premium GRC products have a moderate weight (surface density ≤80kg/㎡), ensuring strength while remaining easy to install. If too heavy, there may be excessive aggregates causing insufficient toughness; if too light, fiber content may be insufficient; 3. Tapping: tap gently with a hard object. Premium products produce a crisp sound with no hollow feeling, while inferior products sound dull, which may indicate excessive internal porosity. Qinglong's GRC products are formed by high-pressure spraying with an internal density of ≥95%; they feel solid and smooth, with no loose or hollow sensation.

Intuitive Check 3: Simple tests—verify basic performance. No professional equipment is needed; quality can be preliminarily judged through simple tests: 1. Abrasion resistance test: lightly scratch the surface with a key or other hard object. Premium products show no obvious scratches, while inferior products are easily left with deep marks; 2. Water absorption test: drop a small amount of water on the product surface. Premium products have a water absorption rate of ≤5%, and water beads do not easily penetrate; inferior products have a water absorption rate of ≥10%, and water beads spread and penetrate quickly; 3. Toughness test: for small components, bend gently. Premium products have a certain toughness and do not break easily, while inferior products are brittle and fracture easily (be careful with the force applied to avoid damaging the product). Qinglong's GRC products have a flexural strength of ≥20MPa, good toughness, and abrasion resistance more than 5 times that of ordinary concrete.

Professional specification verification—ensure long-term stability. After the intuitive checks, request a third-party test report from the manufacturer and focus on verifying four core indicators: 1. Mechanical properties: flexural strength ≥20MPa, compressive strength ≥40MPa, impact strength ≥3.0kJ/m²; 2. Durability: ≥300 freeze-thaw cycles with strength loss ≤10%, no chalking after 500 hours of UV aging; 3. Impermeability: impermeability grade ≥P8, no water seepage after 24 hours of full water saturation; 4. Environmental indicators: free of radioactive substances, formaldehyde, and other harmful substances, complying with the GB 6566-2010 "Limits of Radionuclides in Building Materials" standard. All indicators of Qinglong's GRC products meet or even exceed industry standards, and test reports can be verified on the official websites of third-party institutions.

Judging the quality of GRC products requires combining "intuitive checks + professional indicators". Appearance, touch, and simple tests can quickly screen out inferior products, while professional test reports guarantee long-term performance. Qinglong's GRC products excel in both intuitive qualities and professional indicators, making them a typical representative of premium products. For owners and designers, mastering these assessment methods can effectively help avoid inferior products and choose a truly reliable GRC manufacturer.