COATING COMPRISING PETROLEUM COKE
A bituminous mix has aggregates, petroleum coke, and at least one hydrocarbon binder. The bituminous mix has at least 50% by weight of aggregates and at least 8% by weight of petroleum coke. The bituminous mix is prepared by mixing the aggregates, petroleum coke, and the at least one hydrocarbon binder at a mixing temperature ranging from 100 to 220° C.
1 .- 16 . (canceled)
17 . A bituminous mix comprising:
at least 50% by weight of aggregates,
at least 8% by weight of petroleum coke, and
at least one hydrocarbon binder.
18 . The bituminous mix according to claim 17 , wherein the weight ratio of the petroleum coke to the hydrocarbon binder is 1.8 or higher.
19 . The bituminous mix according to claim 17 , comprising from 8 to 45% by weight of petroleum coke.
20 . The bituminous mix according to claim 17 , wherein the petroleum coke has a maximum particle size of 20 mm or less.
21 . The bituminous mix according to claim 17 , wherein the petroleum coke has a maximum particle size of less than 63 μm.
22 . The bituminous mix according to claim 17 , wherein the aggregates are selected from the group consisting of coarse aggregates having a particle size of 6.3 mm or greater, medium aggregates having a particle size greater than 2 mm and less than 6.3 mm, fine aggregates having a particle size of 63 μm to 2 mm, fines having a particle size of less than 63 μm, and combinations thereof.
23 . The bituminous mix according to claim 17 , comprising from 50 to 90% by weight of aggregates.
24 . The bituminous mix according to claim 17 , comprising as aggregates:
from 0 to 90% by weight of coarse aggregates having a particle size of 6.3 mm or greater;
from 0 to 90% by weight of medium aggregates having a particle size greater than 2 mm and less than 6.3 mm;
from 0 to 70% by weight of fine aggregates having a particle size of 63 μm to 2 mm; and
from 0 to 40% by weight of fines having a particle size of less than 63 μm;
relative to the total weight of the coated material.
25 . The bituminous mix according to claim 17 , comprising from 2 to 20% by weight of hydrocarbon binder.
26 . The bituminous mix according to claim 17 , wherein the hydrocarbon binder is selected from the group consisting of bitumens, pitch, light-coloured binders and mixtures thereof.
27 . The bituminous mix according to claim 17 , further comprising from 0 to 20% by weight of additives selected from the group consisting of colouring agents, anti-caking compounds, emulsifying agents, reinforcing fibres, anti-stripping agents, additives for lowering temperatures of production, application and/or compacting of the bituminous mix, and mixtures thereof.
28 . The bituminous mix according to claim 17 , comprising:
from 8 to 45% by weight of petroleum coke;
from 10 to 65% by weight of coarse aggregates having a particle size of 6.3 mm or greater;
from 10 to 65% by weight of medium aggregates having a particle size greater than 2 mm and less than 6.3 mm;
from 5 to 65% by weight of fine aggregates having a particle size of 63 μm to 2 mm;
from 0 to 10% by weight of fines having a particle size of less than 63 μm;
from 2 to 20% by weight of hydrocarbon binder; and
from 0 to 20% by weight of additives.
29 . The bituminous mix according to claim 17 , comprising:
from 8 to 40% by weight of petroleum coke;
from 5 to 55% by weight of coarse aggregates having a particle size of 6.3 mm or greater;
from 5 to 55% by weight of medium aggregates having a particle size greater than 2 mm and less than 6.3 mm;
from 5 to 50% by weight of fine aggregates having a particle size of 63 μm to 2 mm;
from 5 to 40% by weight of fines having a particle size of less than 63 μm;
from 2 to 20% by weight of hydrocarbon binder; and
from 0 to 20% by weight of additives.
30 . The bituminous mix according to claim 17 , wherein the weight ratio of the petroleum coke to the hydrocarbon binder is 2 or higher.
31 . The bituminous mix according to claim 17 , comprising from 10 to 30% by weight of petroleum coke.
32 . The bituminous mix according to claim 17 , comprising from 60 to 85% by weight of aggregates.
33 . The bituminous mix according to claim 17 , comprising as aggregates:
from 5 to 65% by weight of coarse aggregates having a particle size of 6.3 mm or greater;
from 5 to 65% by weight of medium aggregates having a particle size greater than 2 mm and less than 6.3 mm;
from 5 to 65% by weight of fine aggregates having a particle size of 63 μm to 2 mm; and
from 0 to 20% by weight of fines having a particle size of less than 63 μm;
relative to the total weight of the coated material.
34 . The bituminous mix according to claim 17 , comprising from 5 to 15% by weight of hydrocarbon binder.
35 . A method for preparing a bituminous mix according to claim 17 , the method comprising:
providing the aggregates, the petroleum coke, and the at least one hydrocarbon binder; and
mixing the aggregates, the petroleum coke, and the at least one hydrocarbon binder,
wherein the mixing is performed at a mixing temperature ranging from 100 to 220° C.
36 . The method according to claim 35 , wherein the mixing temperature is attained by heating the aggregates and/or the petroleum coke to a temperature of 100 to 220° C. before the mixing step.