Bituminous composition
View Patent ↗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.
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.
2. The composition of claim 1 , wherein the amphoteric emulsifier comprises a member selected from the group consisting of:
a reaction product of polyethylene polyamines reacting with C-12 to C-24 fatty acids, rosin acids, and combinations thereof modified with acrylic acid, maleic anhydride, or fumaric acid,
a salt of C-12 to C-24 alkyl amidopropyl halide methyl carboxylate betaine,
a salt of C-12 to C-24 alkyl amidopropyl halide phosphate betaine, and
a salt of C-12 to C-24 alkyl amidopropyl halide sulphate betaine.
3. The composition of claim 2 , wherein the salt is lithium salt, sodium salt, potassium salt, or a mixture thereof.
4. A paved road comprising at least one layer of the bituminous composition of claim 2 .
5. A paved road comprising at least one layer of the bituminous composition of claim 1 .
6. The bituminous composition of claim 1 , wherein substantially all of the bitumen has 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.
7. 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) a cationic 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)½; 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.
8. The composition of claim 7 , wherein the cationic emulsifier comprises a member selected from the group consisting of:
fatty imidazoline derived from C-12 to C-24 fatty acids,
fatty imidoamine,
fatty amidoamine,
C-12 to C-24 alkyl monoamine,
C-12 to C-24 alkyl polypropylenepolyamine,
polyoxyethylene derived from C-12 to C-24 alkyl monoamine reacting with ethylene oxide, propylene oxide, or both,
polyoxyethylene derived from C-12 to C-24 alkyl polypropylenepolyamine reacting with ethylene oxide, propylene oxide, or both,
C-12 to C-24 alkyl aryl monoamine,
C-12 to C-24 alkyl aryl polypropylenepolyamine,
C-12 to C-24 quaternary amine,
C-12 to C-24 alkyl ether amine,
C-12 to C-24 alkylether polyamine,
C-12 to C-24 alkyl polypropylene polyamine N-oxide,
amine derivative of at least one of tannin, phenolic resin, lignin, and
amine-modified polyacrylate.
9. The composition of claim 8 , wherein the fatty imidoamine is derived from C-12 to C-24 fatty acids, rosin acids, and combinations thereof modified with maleic anhydride, or fumaric acid, and further reacted with polyalkylenepolyamine.
10. The composition of claim 8 , wherein the fatty amidoamine is derived from C-12 to C-24 fatty acids, rosin acids and combinations thereof modified with acrylic acid, maleic anhydride, or fumaric acid, and further reacted with polyalkylenepolyamine.
11. A paved road comprising at least one layer of the bituminous composition of claim 8 .
12. A paved road comprising at least one layer of the bituminous composition of claim 7 .
13. The bituminous composition of claim 7 , wherein substantially all of the bitumen has 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.