This standard specifies the procedure for sampling ceramic tiles from a given lot and defines the statistical basis for accepting or rejecting the lot based on visual and dimensional inspection. It uses an Acceptable Quality Level (AQL) approach to ensure product quality without requiring 100% inspection.
Establishes a system for classification and sampling procedures for ceramic tiles, defining criteria for acceptance.
Quick Reference Values
Diameter of supporting and loading rods10 mm or 20 mm depending on tile size
Rate of application of load1.0 ± 0.2 N/mm²·s
Minimum number of test specimens10
Span between supporting rods (L) for tiles >= 100mmLength of tile (l) minus 40 mm
Key Formulas
σ = (3 * F * L) / (2 * b * h²) — Formula for Flexural Strength (Modulus of Rupture)
Practical Notes
The condition of the tile edges and precise centering of the specimen on the supports are critical for accurate results.
The MOR value is calculated from the breaking load (F); it is not read directly from the machine.
The loading rate must be constant and within the specified range (1.0 ± 0.2 N/mm²·s), as this significantly affects the result.