Cold extraction by agitation

The cold mix extraction (dissolution of bitumen) by agitation is conducted by using 2000 x 10 mm (2000 ml) or 3000 x 10 mm (3000 ml) sealed containers and a sufficient mass of solvent. 

The test portion is placed in the container and is shaken for at least 30 min, after which the container is left standing up for at least 5 min to settle. 

The mass of the solvent (tetrachloroethylene), Mp, is 1.6 times the mass of the sample, if the asphalt contains more than 5% binder, or 0.8 times the latter, if it contains less than 5% binder. For mastic asphalt, the mass of the solvent is 4 to 5 times the mass of the sample. 

The temperature of the asphalt in all cases should be less than 90°C. 

The separation of mineral filler from the solution is carried out by bucket-type centrifuge-Type 2. The bucket-type centrifuge-Type 2 is capable of producing a minimum acceleration of 40 X 10 m/s fitted with buckets having a capacity greater than 20 x 10 mm. The procedure to recover a portion of binder quantity is described in CEN EN 12697-1 (2012), Annex B.3.2. 

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