Rejuvenation of reclaimed asphalt pavement

2:

• The method of claim 1, wherein the mixture comprises 1-40 wt. % oil sludge, based on the total weight of the RAP.

3:

• The method of claim 1, wherein the sediments in the oil sludge are at least one selected from the group consisting of sulfur, calcium oxide, iron rust, and copper oxide.

4:

• The method of claim 1, wherein the sediments in the oil sludge have 1-15 wt. % sulfur, 25-50 wt. % calcium oxide, 5-25 wt. % iron rust, and 5-25 wt. % copper oxide, based on the total weight of the sulfur, calcium oxide, iron rust, and copper oxide.

5:

• The method of claim 1, wherein the oil sludge comprises at least five elements selected from the group consisting of carbon, hydrogen, oxygen, sulfur, calcium, iron, sodium, magnesium, silicon, chlorine, mercury, copper, bromine, molybdenum, vanadium, cadmium, chromium, lead, zinc, and nickel.

6:

• The method of claim 1, wherein the oil sludge further comprises 1-8000 mg of nickel per kg of the oil sludge.

7:

• The method of claim 1, wherein the oil sludge further comprises 1-100 mg of vanadium per kg of the oil sludge.

8:

• The method of claim 1, further comprising mixing the oil sludge with cement to form a cement treated oil sludge prior to mixing with the RAP.

9:

• The method of claim 8, wherein the cement treated oil sludge is 15-40 wt. % cement and 60-85 wt. % oil sludge, based on the total weight of the cement and the oil sludge.

10:

• The method of claim 1, further comprising adding 0-90 wt. % new asphalt concrete to the RAP, based on the total weight of the new asphalt concrete and the RAP, prior to mixing with the oil sludge, the at least one asphalt binder, and the at least one aggregate.

11:

• The method of claim 1, wherein the at least one asphalt binder is at least one selected from the group consisting of PG58-22, PG64-10, PG64-16, PG64-28, and PG70-10.

12:

• The method of claim 1, wherein the at least one aggregate is at least one selected from the group consisting of limestone, granite, syenite, diorite, basalt, diabase, gabbro, sandstone, chert, shale, gneiss, schist, slate, quartzite, marble, and serpentine.

13:

• The method of claim 1, wherein the rejuvenated paving material has a splitting energy of at least 20,000 N-mm.

14:

• The method of claim 1, wherein the rejuvenated paving material has a Marshall stability at least 10% greater than a corresponding ASTM minimum requirement.

15:

• The method of claim 1, wherein the rejuvenated paving material has a moisture resistance at least 5% greater than the corresponding ASTM minimum requirement.

16:

• The method of claim 8, wherein the rejuvenated paving material has a moisture resistance at least 10% greater than the corresponding ASTM minimum requirement.

17:

• The method of claim 1, wherein the rejuvenated paving material has a fracture energy within 5% of a paving material rejuvenated by the same method but with oil sludge free of sediments.

18:

• The method of claim 8, wherein the rejuvenated paving material has a rutting resistance at least 10% greater than a paving material rejuvenated by the same method but with oil sludge free of sediments.

19:

• The method of claim 1, wherein the rejuvenated paving material has a flexibility within 10% of a paving material rejuvenated by the same method but with oil sludge free of sediments.

20:

• The method of claim 1, wherein the rejuvenated paving material leaches less than 5 mg/L of mercury, cadmium, chromium, lead, copper, nickel, zinc, and/or iron.