MASTIC COMPOSITION FOR ASPHALT MIXTURES AND PROCESS FOR MAKING SUCH A MASTIC COMPOSITION.

摘要

A mastic composition consists substantially ofa bituminous binder materialand granular asphalt aggregateswith a diameter of at most 2 mm, wherein the granular asphalt aggregates consist for a proportion of at least 50 %wt, based onthe weight of the aggregates, of reclaimed granular asphalt aggregatesthat have a diameter of at most 2 mm, wherein the bituminous binder material comprises recycle bitumen, and wherein the amount of bituminous binder materialis at least 15%wt, based onthe weight of the bituminous binder materialand the granular asphalt aggregates. It may be used in a process for the manufacture of an asphalt composition, wherein the mastic composition is heated to an elevated temperature and the thus heated mastic compositionis passed to an expansion chamber; water is passed to the expansion chamber to contact the heated mastic composition to form steam, thereby forming a foamed mastic composition; and the foamed mastic composition is combined with coarse aggregates, yielding an asphalt composition.