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Bituminous mixtures-Test methods for hot mix asphalt
Determination of the affinity between aggregate and bitumen
Procedure
Establishing the calibration curve
For silico-calcareous or siliceous aggregates proceed as follows:Put each of the 200g mixes described in table 1 into contact with 200g of N hydrofluoric acid in a polyethylene beaker capped with a cover glass. Perform the acid attack under agitation using a shaker with oscillating action. Homogenize the solution at the start and after 1 hour by a few rotations of the beaker.