BS EN 12697-6 pdf free download

BS EN 12697-6-2020 pdf free download.Bituminous mixtures — Test methods Part 6: Determination of bulk density of bituminous specimens.
5.2 Additional materials for the sealed specimen procedure Material to seal the specimen, in such a way, that inclusion of voids (being no part of the specimen) between seal and specimen is prevented. The density of the sealing material at test temperature shall be known to the nearest 0,010 Mg/m 3 . The material used can be paraffin wax, shrinkage foil, latex emulsion etc. The procedure to apply such materials should be such that the specimen is not damaged. It is very important that the seal exactly covers the specimen including the voids which technologically form part of its volume: when applying the seal penetration of the internal voids belonging to the material is prevented, as well as inclusion of extra voids between seal and specimen or in seal folds. 6 Apparatus
6.1 General 6.1.1 Balance, with sufficient capacity for weighing the specimen in air and under water (e.g. via a wire basket, the mass and water displacement of which are taken into account by taring), with an accuracy of at least 0,1 g for masses up to 5 kg, and 1 g for masses over 5 kg.
6.2 Additional apparatus for the dry, SSD and sealed specimen procedures 6.2.1 Water-bath, maintained at a uniform temperature within ± 1,0 °C in the vicinity of the test specimen(s). It shall be provided with a grid to ensure the water circulation around the test specimen. The bath shall have a capacity of at least three times that of the volume of the specimen.
6.2.2 Thermometer, with an accuracy of ± 0,5 °C.
6.3 Additional apparatus for the SSD-procedure 6.3.1 Chamois, damp, for blotting and wiping the specimen. The Chamois shall be damp enough to ensure that the moisture at the specimen surface is removed when wiping without withdrawing moisture from the internal voids. 6.4 Additional apparatus for the dimensions procedure
6.4.1 Calliper gauge, or other suitable apparatus for measuring the dimensions of the specimen to at least ± 0,1 mm (see EN 12697-29). 7 Sample sizes and sample handling The minimum thickness of the specimen shall be 20 mm or two times the maximum nominal size of the aggregate, whichever is largest. Care shall be taken to ensure that the specimens are not disturbed during handling. The specimens shall be stored in a cool place at a temperature not exceeding 25 °C. 8 Preparation of sample Specimens shall be cleaned if necessary, by brushing or washing, as required. The specimens shall be dry, have a known water content, or be allowed to dry to constant mass. NOTE Constant mass is defined as successive weighings after drying at least 1 h apart not differing more than 0,1 %. 9 Procedure 9.1 General All masses shall be determined in gram to the nearest 0,1 g. All measurements shall be determined in millimetre to the nearest 0,1 mm. NOTE General guidance on determining the required procedure related to the specific bituminous material is given in Annex A. 9.2 Procedure A: Bulk density — dry Carry out the procedure as follows: a) Determine the mass of the dry specimen (m 1 ). When testing damp specimens, step a) shall be carried out after steps b) to d). b) Determine the density of the water at test temperature at the nearest 0,000 1 Mg/m 3 (ρ w ) according to 5.1. c) Immerse the specimen in the water-bath kept at known test temperature. d) Determine the mass of the specimen immediately the water has settled after immersion (m 2 ).BS EN 12697-6 pdf download.