Overview
ISO 10545-8:2014 specifies a standardized test method for determining the coefficient of linear thermal expansion of ceramic tiles. The method covers measurement of dimensional change from ambient temperature up to 100 °C and defines apparatus, specimen preparation, measurement procedure and reporting requirements. The procedure is intended to support repeatable laboratory measurement for quality control and material evaluation.
Key Topics
- Principle: Determine linear thermal expansion coefficient from ambient temperature to 100 °C by measuring length change with controlled heating.
- Apparatus: Suitable thermal expansion apparatus with uniform heat distribution and a heating rate of (5 ± 1) °C/min; vernier calipers or equivalent measuring device; drying oven capable of (110 ± 5) °C; desiccator.
- Test specimens: Two specimens cut at right angles from the central portion of a tile. Ends must be ground flat and parallel. Minimum length 25 mm; cross-section side < 6 mm and area > 10 mm² where applicable. For glazed tiles, do not remove the glaze from specimen ends.
- Preparation and conditioning: Dry specimens at (110 ± 5) °C until constant mass (weight difference
