BS EN 12594-2000 pdf download.Methods of test for petroleum and its products — BS 2000-461: Bitumen and bituminous binders — Preparation of test samples (Identical with IP 461/2000).
6.5 Metal sieve, mesh size 0,50 mm, made from brass or stainless steel if used with
bitumen emulsions.
6.6 Aluminium foil or lid, for melting pan.
6.7 Test sample container or moulds, metal, plastic or glass jar with a lid or other
closure, or glass conical flask with ground glass stopper.
7 Procedure
7.1 Solid or semi-solid samples
7.1.1 Small samples (up to I litre)
Ease the lid or other closure of the sample container and place the container with the lid loose in the oven for 120 mm maximum at a temperature which is 80 °C to 90 °C above the expected softening point as defined in EN 1427. For modified bitumen the temperature shall be between 180 °C and 200 °C, irrespective of the softening point. Lower temperature required at later stages shall be achieved by cooling.
Remove the container from the oven and stir the melted sample with care in order to avoid incorporation of air bubbles into the sample. For modified binders stir according to handling suggestion from supplier, when available. Allow any air bubbles to escape, if necessary by placing the sample in the oven for not more than 5 mm. Pour the liquefied and homogenized sample into the moulds or test sample containers.
Carry out the entire procedure (melting, homogenizing and moulding) within 135 mm.
If tests have to be repeated or extended, follow the procedure described in 7.1.2; reheating
or remelting of the sample is not permitted.
7.1.2 Samples (greater than I litre)
If necessary cut sufficient amount of material (100 g minimum) from the container by using an appropriate tool (e.g. a warmed but not glowing knife) and transfer the material into the melting pan.
Place the melting pan in the oven, or the hot air, or oil bath, or equivalent.
Melt the material within 60 mm with manual stirring at a temperature which is 80 °C to 90 °C above the expected softening point as defined in EN 1427. For modified bitumen the temperature shall be between 180 °C and 200 °C, irrespective of the softening point. Lower temperatures required at later stages shall be achieved by cooling.
Stir the melting sample with care in order to prevent local overheating and avoid incorporation of air bubbles into the sample. For modified binders stir according to handling suggestion from supplier, when available. If necessary, cover the melting pan with aluminium foil or with a loose fitting lid.
Heat until the sample has become sufficiently fluid to pour. Allow any air bubbles to escape.
Pour the liquefied and homogenized sample into the moulds or test sample containers.
Carry out the entire procedure (melting, homogenizing and moulding) within 135 mm.
Do not reuse the remaining samples which have been heated.
NOTE: For modified bitumen, highly oxidized bitumen and hard bitumen the whole sample should be melted as follows:
for 11 to 2 I in 3 h maximum:
for 2 Ito 3 I in 3 h 30 maximum:
for more than 3 I in 4 h maximum.
Larger samples. i.e. more than 10 I, need more time for melting if the whole sample needs to be melted. More time than is needed for meLting should not be used. The entire procedure (melting, homogenizing and moulding) should be carried out within 3 h 30 mm. 4 h and 4 h 30 mm respectively.
7.2 Liquid samples (melted, fluxed or cut-back binder, but not emulsions)
If necessary, to minimize loss of volatiles during heating, cover the container with aluminium
foil or a loose fitting lid. Homogenize the entire sample by gently stirring manually.
NOTE: If the consistency is too high. the sample should be heated with care for 30 mm maximum in a hot air or oil bath or equivalent until it becomes sufficiently fluid to pour.
For binders with a ring and ball softening point of 30 °C or less, the heating temperature shall be 100 °C maximum.
Avoid incorporation of air bubbles into the sample by allowing any air bubbles to escape. Pour the homogeneous liquid material into the mould or test sample containers.BS EN 12594-2000 pdf download.