This standard specifies the method for determining the water absorption of all types of ceramic tiles. The procedure involves drying specimens to a constant mass, immersing them in boiling water for a specified duration, and then determining the increase in mass. This property is a key parameter for tile classification and determining its suitability for various exposure conditions.
Prescribes a method for determining the water absorption of ceramic tiles, a key property for their application.
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.