EN 13614:2011 – Bitumen and bituminous binders – Determination of adhesivity of bituminous emulsions by water immersion test

8 Procedure
8.1 General Carry out the procedure under normal laboratory conditions (23 ± 5) °C. If the intrinsic adhesivity of the emulsion is controlled, the procedure shall be carried out with the reference aggregate(s). The reference aggregate(s) shall be washed with water (5.2) and dried in the ventilated oven (6.10) at (110 ± 5) °C for about 2 h. If the adhesivity behaviour of a specific emulsion/aggregate combination is controlled for a specific job site, the aggregate shall be used in its job site conditions (5.1).
8.2 Determination of immediate adhesivity
8.2.1 Weigh (100 ± 5) g of aggregate (5.1) into a dish (6.3) and (150 ± 5) g of emulsion into another dish (6.3).
8.2.2 Pour the aggregate into the emulsion and allow contacting for (60 ± 5) s without stirring; the dish may be gently shaken to disperse any air bubbles which might prevent proper moistening of the aggregate.
8.2.3 Remove excess emulsion by carefully tilting the dish and wash the aggregate at room temperature, holding the dish tilted under a slow stream of water (5.2) until the water runs clear.
8.2.4 Introduce the coated aggregate into a beaker (6.5) and cover with approximately 300 ml of water (5.2) at room temperature.
8.2.5 Immediately assess the surface coated with the film of binder and grade it according to the scheme indicated in Clause 9.
8.3 Water effect on binder adhesion
8.3.1 General This procedure shall be used, with reference aggregate(s), to check conformity to the intrinsic “adhesivity” requirement specified in EN 13808. The reference aggregate(s) is (are) then washed with water (5.2) and dried in the ventilated oven (6.10) at (110 ± 5) °C for about 2 h. It may also be used to check water effect on binder adhesion for a specific emulsion/aggregate combination used on a specific job site. The aggregate shall then be used in its job site conditions (5.1).
8.3.2 Weigh (200 ± 5) g of aggregate (5.1) into a dish (6.3) and an amount of emulsion corresponding to (10 ± 1) g of bituminous binder into another dish (6.3).
8.3.3 Pour the aggregate into the emulsion and thoroughly mix by means of a spatula (6.2). 8.3.4 If full coating (100 % of coverage) is not achieved, restart the procedure as from 8.3.1 by increasing the amount of residual bitumen to (20 ± 1) g. The amount of residual bitumen actually used shall be mentioned in the test report (Clause 11 f)).
8.3.5 Spread the mixture on a watch-glass (6.6) and place it in the ventilated oven (6.10) at (60 ± 3) °C for (24 ± 1) h.
EN 13614:2011 – Bitumen and bituminous binders – Determination of adhesivity of bituminous emulsions by water immersion test