AS ISO 10545.3:2020 Ceramic tiles Method 3: Determination of water absorption, apparent porosity, apparent relative density and bulk density.
This document specifies a method for determining water absorption, apparent porosity, apparent relative density and bulk density of ceramic tiles. This method is applicable to classification of tiles and product specifications.
2 Normative references
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3 Terms and definitions
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Impregnation of dry tiles with water and then suspension in water. Calculation of the listed properties using the relationships between dry, saturated and suspended masses.
5.1 Drying oven, capable of being operated at least at (110 ± 5) °C. Microwave, infrared, or other drying systems may be used provided that it has been determined that the same results are obtained.
5.2 Balance, accurate to 0,01 % of the mass of a test specimen.
5.3 Deionized or distilled water
5.5 Microfibre cloth
5.6 Wire ioop, halter or basket, capable of supporting specimens under water for making suspended mass measurements.
5.7 Glass beaker, or similar container of size and shape such that the sample, when suspended from the balance (5.2) by the wire ioop (5.6), is completely immersed in water, with the test specimen and the wire ioop being completely free of contact with any part of the container.
5.8 Vacuum chamber and vacuum system, of sufficient capacity to accommodate the test
specimens and evacuate to a pressure of 10 ± 5 kPa (91 ± 5 kPa below standard atmospheric pressure of 101 kPa) for 30 mm.
6 Test specimens
Sampling shall be carried out according to the dimension of tiles as reported in Table 1. In Table 2 some examples of different common sizes are reported. The number of the specimens to be tested for each tile as well the number of tiles are function of the tile dimension. Tiles and relevant specimens shall not contain visible damage or cracks prior to testing and shall not have been previously tested. Any loose or contaminating material shall be removed. This includes any mesh, paper and adhesive that has been applied to mosaics.
When the mass of each individual tile is below 50 g, a sufficient number of tiles shall be taken so that each test specimen reaches a mass of 50 g to 100 g. For those specimens, 6.2 is not applicable.AS ISO 10545.3 pdf download.