Bituminous composition

摘要

A bituminous composition comprising a bitumen emulsion in an amount from about 2% to about 10% by total weight of the bituminous composition, and aggregate in an amount from about 90% to about 99% by total weight of the bituminous composition, wherein the bituminous composition is at a temperature range of about 50° C. to about 140° C. The bitumen emulsion comprises hard bitumen in an amount from about 50% to about 75% by total weight of the bitumen emulsion, the hard bitumen being characterized by a penetration number of about 100 dmm or less at 25° C. as determined according to the AASHTO Method T49, and an emulsifier in an amount from about 0.05% to about 2% by total weight of the bitumen emulsion, the emulsifier having a Hildebrand solubility parameter of at least of about 19 (MPa)½. Also disclosed are the methods of producing and using such bituminous compositions.

主权项

1. Bituminous composition comprising:
(a) a bitumen emulsion in an amount from 2% to 10% by total weight of the bituminous composition, wherein the bitumen emulsion comprises:
(i) hard bitumen in an amount from 50% to 75% by total weight of the bitumen emulsion, the hard bitumen being characterized by a penetration number of 100 dmm or less at 25° C. as determined according to the American Association of State Highway and Transportation Officials (AASHTO) Method T49,(ii) an amphoteric emulsifier in an amount from 0.05% to 2% by total weight of the bitumen emulsion, the emulsifier having a Hildebrand solubility parameter of at least of about 19 (MPa)1/2; and (b) aggregate in an amount from 90% to 98% by total weight of the bituminous composition, wherein the bituminous composition is at a temperature range of 50° C. to 140° C., and wherein the hard bitumen wets a surface of the aggregate, and the emulsifier enhances the bitumen wetting of the aggregate surface.