What Standards Should the Impact Resistance of GRC Panels Meet? GRC Impact Resistance Technical Specifications

The impact resistance standard for GRC panels is determined by the area of use: indoor walls require impact energy resistance ≥5J, outdoor walls ≥10J, and densely occupied areas ≥15J. Testing follows the GB/T 9978 standard, with a drop ball height of 1m and a steel ball mass of 1kg; a pass means no cracks or spalling after impact.

Experimental data show that high-quality GRC panels can withstand a 15J impact energy with only slight indentation on the surface. GRC wall panels in a school corridor passed impact resistance testing with no damage after a 10J impact, meeting safety requirements for use. The absence of radial cracks around the impact point demonstrates the material's good toughness.

Grading by Area of Use

Indoor walls ≥5J; outdoor walls ≥10J; these grades address different needs.

Testing Method Standard

Drop ball impact test; these methods provide scientific evaluation.

Pass Criteria

No cracks; no spalling; these standards ensure safety.

Toughness Performance Requirements

Strong impact energy absorption capacity; these requirements reflect material toughness.

Impact resistance concerns safety in use. Qinglong GRC products meet the standards—safe and reliable.