BS EN 12697-6:2020 pdf free download – Bituminous mixtures一Test methods Part 6: Determination of bulk density of bituminous specimens.
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 (mi). 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/rn3 (p) 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 (mz).
9.3 Procedure B: Bulk density — Saturated surface dry (SSD)
Carry out the procedure as follows:
a) Determine the mass of the dry specimen (mi). When testing damp specimens, step a) shall be carried out after steps b) to g).
b) Determine the density of the water at test temperature to the nearest 0,000 1 Mg/m (pw) according to 5.1.
c) Immerse the specimen in the water-bath at known test temperature. Allow the water to saturate the specimen sufficiently long enough for the mass of the specimen not to change.
In general, the required saturation period is 30 mm but should not be more than 3 h.
d) Determine the mass of the saturated specimen when immersed (m2), taking care no air bubbles adhere to the surface of the specimen or leave the specimen when weighing.
e) Remove the specimen from the water, dry the surface from adhered drops by wiping with a damp Chamois.
f) If water continues to drain from the sample, discontinue the measurement by Procedure B, saturated surface dry, and undertake the measurement by Procedure C, sealed specimen or procedure D if applicable.
g) Determine the mass of the saturated, surface wiped specimen in air immediately after drying (m3).
9.4 Procedure C: Bulk Density — Sealed specimen
Carry out the procedure as follows:
a) Determine the mass of the dry specimen (ml). When testing damp specimens, step a) shall be carried out after steps b) to f).