Process for the manufacture of stockable dense road asphalts

Details Process for the manufacture of stockable dense road asphalts Process for the manufacture of stockable dense road asphalts

1989-03-07

1990-12-18

Myers, Helane

Compositions: coating or plastic

Coating or plastic compositions

Bituminous material or tarry residue

106280, 208 22, 208 23, 208 39, C08L 700

Patent

active

049783939

ABSTRACT:
A process for the manufacture of stockable dense road asphalt that is comprised of materials, having elements of a diameter from essentially zero to 10-30 mm, coated in a cutback or fluidified bitumen-based binder. The materials are separated into at least two granulometries. The first group is a grouping of the smallest elements. The second group is a grouping of the remaining elements. The first group is coated with a first bituminous binder emulsion which is a cationic cutback or fluidified bitumen emulsion with a fracture index greater than zero and having a residual binder viscosity measured on a Standard Tar Viscosimeter (10 mm, 25.degree. C.) of less than 50 seconds. The second group is coated with a second bituminous binder emulsion which is a cationic cutback or fluidified bitumen emulsion with a residual binder viscosity measured on a Standard Tar Viscosimeter (10 mm, 25.degree. C.) of between 1000 and 2000 seconds. Both the coated groups are then mixed together for a few seconds.

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