Oxidized bitumen 90/40 factory

Oxidized bitumen 90/40 factory

According to a first form of implementation, the method for preparing cross-linked and/or functionalized bitumen compositions consists in putting the non oxidized bitumen and the oxidized bitumen 90/40 chosen to make the bituminous matrix in contact with, by weight of said matrix, 0.5% to 30% and preferably 1.5% to 20% of a precursor elastomer, namely a non cross-linked and non functionalized elastomer, and 0.01% and 6%, more particularly 0.05% to 3% of a cross-linking agent and/or a functionalization agent, while operating at temperatures ranging between 100° C. and 230° C., preferably between 130° C. and 200° C. and while stirring for at least 5 minutes.

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