ISO 10545-23:2025

ISO 10545-23:2025 - Overview

ISO 10545-23:2025 specifies a standardized laboratory method to determine the elastic modulus of glazed and unglazed ceramic tiles - including the substrate and the glaze layer - at ambient temperature using three-point bending tests. The document covers specimen preparation, test modes, loading rates, data acquisition, measurement accuracy and reporting requirements. It is intended for plate-shaped tiles and excludes profiled tiles that cannot be machined into test specimens. Annex A and B provide additional guidance on applications and specimen preparation.

Key topics and technical requirements

• Test principle: Elastic modulus calculated from the linear portion of the load–deflection curve obtained in a three-point bending configuration. Measurement of both glazed and unglazed specimens enables calculation of the glaze-layer modulus.
• Specimen geometry: Typical specimen size is 300 mm long × 30 mm wide; thickness normally 10 mm (or equal to tile thickness ≤ 10 mm). Smaller specimens (220 mm × 20 mm) recommended when thickness