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US 12,655,275 B2Granted
Biochar additives for bituminous composites
AssigneeArizona Board of Regents on behalf of Arizona State University
InventorsElham Fini, Shuguang Deng, Amirul Islam Rajib, Kodanda Phani Raj Dandamudi
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Abstract
Biochar can be used as an additive for bitumen. A bitumen composite includes bitumen and biochar. The biochar can include biochar from one or more of algae, food waste, animal waste, and cellulose-containing material (e.g., palm sheath). The biochar typically comprises 1 wt % to 20 wt % of the weight of the bitumen composite. The bitumen composite can be combined with aggregate to yield asphalt.
Claims19
A bitumen composite comprising:
- bitumen;
- and
- biochar, wherein the biochar comprises 1 wt % to 20 wt % of the bitumen composite, wherein the biochar comprises biochar derived from hydrothermal liquefaction of algae, and the biochar is functionalized with nitrogen-containing groups or compounds, oxygen-containing groups or compounds, or both.
A method of making a bitumen composite, the method comprising:
- liquefying biomass to yield biochar, wherein the biomass comprises algae and swine manure;
- combining the biochar with bitumen to yield a modified bitumen, wherein the biochar is functionalized with nitrogen-containing groups or compounds, oxygen-containing groups or compounds, or both;
- and
- homogenizing the modified bitumen to yield the bitumen composite.
1 more element
Dependencies are inferred from the claim text.