Binder modified with glycerol for making asphalt mixes with a hicontent of recycled bituminous materials
AssigneeColas
InventorsMichael John Davis, Jean-Paul Fort, Thierry Delcroix
Life of this patent
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Abstract
The present invention generally relates to asphalt mixes with a high content of recycled bituminous materials including a binder modified with glycerol. The present invention further relates to a method for preparing the asphalt mixes and to the use of the asphalt mixes as materials for making courses and/or surfacing for road construction and/or civil engineering. The present invention also relates to the use of glycerol as a correcting agent for the workability and/or of the thermal cracking resistance and/or of the rutting resistance of an asphalt mix with a high content of recycled bituminous materials.
Claims18
An asphalt mix with a high content of recycled bituminous materials to be used for making a course for a pavement to be applied in a geographical area, said mix comprising (i) a granular mixture comprising recycled bituminous materials consisting of aggregates and aged binder(s), and (ii) an added binder characterized in that said aged binder(s) represent(s) at least 18% by weight of the total weight of the mixture of aged binder(s) and added binder, and in that said asphalt mix comprises glycerol.
Method for improving the workability and/or the thermal cracking resistance and/or the rutting resistance of an asphalt mix comprising (i) a granular mixture comprising recycled bituminous materials consisting of aggregates and aged binder(s), and (ii) an added binder, said aged binder(s) representing at least 18% by weight of the total weight of the mixture of aged binder(s) and added binder, which comprises adding an effective amount of glycerol to said asphalt mix.
Dependencies are inferred from the claim text.