EN 15626-2016 pdf download.Bitumen and bituminous binders – Determination of adhesivity of cut-back and fluxed bituminous binders by water immersion test – Aggregate method.
6.11 Heating plate, or any other heating device allowing to maintain temperature without overheating.
7 Sampling
The material under test shall be sampled in accordance with EN 58 and prepared in accordance with
EN 12594.
8 Procedure
8.1 Preparation of aggregates and binders
8.1.1 Wash the aggregate (5.1) with water (5.2) and dry it in the ventilated oven (6.2) for a minimum
of 12 hat (110 ± 5)°C.
8.1.2 The quantities of aggregates needed for the tests to be carried out under 8.2 and 8.3 shall be weighed into adequate containers by batches of (200 ± 2) g and/or (400 ± 4) g.
Depending on the binder to be tested, bring the aggregates and the dish(es) to be used for the mixing procedure to the temperature indicated in Table 1 and maintain this temperature for about 2 h.
8.1.3 A binder sample of a minimum amount of 200 g shall be prepared in accordance with EN 12594 and brought to the temperature indicated in Table 1. The efflux time shall be determined in accordance with EN 12846-2 and dynamic viscosity at 60 °C in accordance with EN 13302 or EN 13702. Closed containers shall be used and care shall be taken to avoid local overheating and any loss of volatile constituents.
Leave the binder in the oven for the minimum time to ensure that it reaches the temperature given in Table 1.
Binder formulated with an adhesion improver should be tested under the representative conditions of its use, i.e. after one or several days of storage in a closed container at the typical storage temperature for that binder.
8.2.3 Pour approximately 300 ml of water (5.2) that has been pre-heated to (60 ± 3) °C into the beaker; cover the beaker with a watch-glass and place it in the ventilated oven at (60 ± 3) °C for
(20 ± 4) h (6.1).
8.2.4 Assess the surface coated with the film of binder according to the grading scheme given in Clause 9.
8.3 Procedure for low viscosity cut-back and fluxed bituminous binders
8.3.1 This procedure is to be applied for cut-back and fluxed bituminous binders with an efflux time
10 mm 40 °C (EN 12846-2) lower or equal to 500 s or with a dynamic viscosity at 60 °C (EN 13302 or
EN 13702) lower or equal to 10 Pa s.
8.3.2 Pour (20 ± 2) g of binder prepared as indicated in 8.1.3 into the pre-heated dish and place the dish onto the heating plate (6.11) maintained at the temperature specified in 8.1.3. Pour (400 ± 4) g of aggregates prepared as indicated in 8.1.2 onto the binder and mix with a spatula until coating is completed but no longer. The dish shall remain on the heating plate during mixing. Remove the dish from the heating plate and ensure by periodic stirring that aggregates remain properly coated until binder drainage stops.
Once at ambient temperature, separate the mix into approximately two equal parts:
8.3.3 Put the first part in a beaker (6.6) and cover it with a watch-glass; let it rest for (30 ± 5) mm. Then pour approximately 300 ml of water (5.2) at ambient temperature into the beaker; cover the beaker with a watch-glass and let it rest for (20 ± 4) h at ambient temperature.
8.3.4 Spread the second part on a watch-glass (6.7) and place it in the ventilated oven (6.1) for (24 ± 1) h at (60 ± 3) °C. Care shall be taken to properly spread out the coated aggregates on the watch- glass to ensure a single layer. Then transfer the mixture in a beaker (6.6). pour roughly 300 ml of water (5.2) that has been preheated to (60 ± 3)°C into the beaker; cover the beaker with a watchglass and place it in the ventilated oven at (60 ± 3) °C for (20 ± 4) h (6.1).
With low viscosity binders, in particular those incorporating non- or low-volatile flux oils, binder drainage can occur during the dry curing process at 60 °C. If that is the case, it shall be mentioned in the test report (11) and only the rating obtained following 8.3.3 shall be retained.
8.3.5 Assess for both parts the surface coated with the film of binder according to the grading scheme given in Clause 9.EN 15626-2016 pdf download.