This Standard describes the reference method for the determination of thefineness index of portland cement by the air permeability method, expressed in terms ofsurface area in square metres per kilogram of cement determined at a temperature of 23±2°C.

This Standard describes the reference method for the determination of the fineness index of portland cement by the air permeability method, expressed in terms of surface area in square metres per kilogram of cement determined at a temperature of 23 2C. It allows the use of alternative procedures provided that they do not affect the results significantly, as specified in Clause 4. In the event of a dispute, only the procedure described in this Standard shall be used, excluding any alternatives.NOTE: The test method is known to work well with portland cement, however, judgement should be exercized when determining its suitability in regards to fineness measurements of cements with densities or porosities that differ from those assigned to Standard Reference Material No. 114. Such materials would include blended cements. Reference should be made to ASTM C204 or BS EN 196-6.

First published in Australia as AS 2350.8-1980.Second edition 1987.Jointly revised and designated AS/NZS 2350.8:1999. First published in Australia as AS 2350.8-1980. Second edition 1987. Jointly revised and designated AS/NZS 2350.8:1999.