Patent ID: 7608142

Claim:
A process for the manufacture of a slow-setting bitumen-aggregate mix which comprises a) preparing a cationic oil-in-water emulsion of bitumen in the presence of an emulsifier containing i) a tertiary polyamine, selected from the group consisting of a di(C 2 -C 3 alkylene)triamine, a tri(C 2 -C 3 alkylene)tetraamine, a tetra(C 2 -C 3 alkylene)pentaamine, a penta(C 2 -C 3 -alkylene)-hexaamine, and a hexa(C 2 -C 3 -alkylene)heptaamine or a mixture thereof, which amine compounds have only tertiary amino groups and contain one or two aliphatic groups with 8-22 carbon atoms, bound to the nitrogen atoms, while the remaining nitrogen substituents are methyl groups, and ii) an acid present in such an amount that the aqueous emulsion obtains a pH value from 1-6, and b) mixing the aqueous emulsion obtained with a solid aggregate.