Process for manufacturing an asphalt paving mixture

Details Process for manufacturing an asphalt paving mixture Process for manufacturing an asphalt paving mixture

C - Chemistry, Metallurgy

04

B

C04B 22/02 (2006.01) C04B 26/26 (2006.01)

Patent

CA 2666580

A process for manufacturing an asphalt paving mixture is disclosed. The process comprises the steps of : i) heating bitumen at a temperature of from 100 to 200°C; ii) heating aggregate at a temperature of from 100 to 20°C; and iii) mixing the hot bitumen with the hot aggregate in a mixing unit. From 10 to 200 wt% of sulphur pellets, based upon the weight of the bitumen, are added in at least one of the steps (i), (ii) or (iii). The sulphur pellets comprise from 1 to 50wt% of a monovinyl aromatic compound, based upon the weight of the sulphur pellets.

L'invention concerne un procédé de fabrication d'un mélange pour revêtement en asphalte. Le procédé comprend les étapes consistant à : i) chauffer le bitume à une température comprise entre 100 et 200°C; ii) chauffer l'agrégat à une température de 100 à 20°C; et iii) mélanger le bitume chaud avec l'agrégat chaud dans une unité de mélange. De 10 à 200 % en poids de pastilles de soufre, par rapport au poids du bitume, sont ajoutés au cours d'au moins l'une des étapes (i), (ii) ou (iii). Les pastilles de soufre comprennent de 1 à 50 % en poids d'un composé aromatique monovinylique, par rapport au poids des pastilles de soufre.

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