ÖNORM EN 1097-6

This European Standard specifies methods for the determination of the particle density and water absorption of aggregates. The first five methods are applicable to normal aggregates with a sixth method for lightweight aggregates. The principal methods specified are: a) a wire basket method for aggregates passing a 63 mm sieve but retained on a 31,5 mm sieve; b) pyknometer methods for aggregates passing a 31,5 mm sieve but retained on a 0,063 mm sieve. NOTE 1 The wire basket method may be used as an alternative to the pyknometer method for aggregates between 4 mm and 31,5 mm. In case of dispute, the pyknometer method described in clause 8 should be used the reference method. NOTE 2 The wire basket method can also be used for single aggregate particles retained on a 63 mm sieve. A method for the determination of pre-dried particle density of dense aggregates is specified in annex A. NOTE 3 As the absorption of dense aggregates is low, pre-dried particle density can be determined directly water. This method is different to the determination of particle density on an oven dried basis. A modified version of the wire-basket method suitable for determining the particle density and water absorption of coarse aggregates saturated to constant mass is specified in annex B. For lightweight aggregates, a modified version of the pyknometer test specified in annex A is specified annex C.