| 摘要 |
Process for the production of bituminous compositions based on polymeric residues, especially motor vehicle discards, by extrusion. The process consists in grinding, separately or together, motor vehicle discards and bitumen or asphalt in order to obtain a mean particle size of less than 10 mm. A compatibilising agent which reacts with the bitumen and/or the polymeric residues when the mix is extruded at high temperature is preferably added. The extrusion is carried out either on a preformed mix of bitumen and polymers or by separately introducing, on the one hand, the polymeric residues and, on the other hand, bitumen preferably containing a compatibilising reactant into two different zones of the extruder feed screw. The process can be advantageously employed for the continuous manufacture of bituminous mixes concentrated in polymers and capable of being subsequently employed as additives to roadbuilding or industrial bitumens when they are used.
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