A system and method of producing a feedstock using asphalt shingle waste material includes: (a) providing an asphalt shingle material to a horizontal shaft hammer mill, and milling the material to produce a milled asphalt shingle material; (b) screening the milled asphalt shingle material to produce a milled and screened asphalt shingle material, wherein granules are removed from the milled asphalt shingle material; (c) introducing a heated asphalt flux to an attritor; (d) introducing the milled and screened asphalt shingle material to the attritor; (e) operating the attritor to process the contents of the attritor, producing a recycled asphalt mixture; and (f) passing the recycled asphalt mixture through a filter to produce an asphalt manufacturing feedstock.

The invention relates to a heatable mixer (1) for composite products based on thermoplastic material(s), having an elongate structure defining a longitudinal processing path between at least one inlet and at least one outlet (2) and comprising a heated trough (3) in which two mutually interpenetrating parallel twin screws (4 and 4) are mounted, forming member(s) for dimensionally reducing, heating and moving the products to be processed which are inserted at the inlet, each screw (4, 4) comprising a heated and driven support shaft (5) arranged in the path direction (DT). The mixer (1) is characterised in that it comprises, at the or at each outlet (2), a member (20) for controlling the liquid or semi-liquid output stream of processed products, flowing through the associated outlet (2), advantageously under the effect of gravity.