This standard prescribes the method for determining the resistance to wear by abrasion of natural building stones. It is particularly relevant for evaluating stones intended for use in flooring, paving, and staircases where foot or vehicular traffic causes surface wear.
Method for determination of resistance to wear by abrasion of natural building stones
Quick Reference Values
Test specimen diameter25 mm
Test specimen height25 mm
Speed of grinding lap28 to 30 rpm
Drying temperature for specimen105°C ± 5°C
Key Formulas
Loss in weight = Initial weight (W1) - Final weight (W2)
Percentage wear = ((W1 - W2) / W1) × 100
Practical Notes
Ensure the test specimen is completely dried in an oven and cooled in a desiccator before the initial weighing to eliminate moisture weight inaccuracies.
The abrasive medium must be of standard specification and uniformly fed to the grinding lap to ensure reliable and repeatable test results.
Accurate analytical weighing is critical as the abrasive loss in high-quality, dense building stones can be extremely small.