Sulfur-modified bitumen compositions
AssigneeArizona Board of Regents on behalf of Arizona State University
InventorsElham Fini, Albert Hung
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Abstract
Preparing a modified bitumen composition includes combining bitumen with elemental sulfur to yield a mixture, and crystallizing the elemental sulfur on a surface of the bitumen to yield a layer of elemental sulfur on the surface of the bitumen. The mixture typically includes about 5 wt % to about 15 wt % of the elemental sulfur. A modified bitumen composition includes A modified bitumen composition includes bitumen and elemental sulfur on a surface of the bitumen. The modified bitumen composition includes about 5 wt % to about 15 wt % of the elemental sulfur.
Claims19
A method of preparing a modified bitumen, the method comprising:
- combining bitumen with elemental sulfur to yield a mixture, wherein the mixture comprises about 5 wt % to about 15 wt % of the elemental sulfur;
- and
- crystallizing the elemental sulfur on a surface of the bitumen to yield a layer of elemental sulfur on the surface of the bitumen to yield the modified bitumen,
- wherein crystallizing the elemental sulfur on a surface of the bitumen comprises heating the bitumen under pressure in a pressure aging vessel.
Dependencies are inferred from the claim text.