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US 2025/0154060 A1Published application
Use of waste materials in asphalt
AssigneeWashington State University
InventorsHaifang Wen, Maziar Mivehchi, Chi-Lin Chiang
Life of this patent
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Abstract
Methods for asphalt paving disclosed here incorporate waste recycled asphalt shingles (RAS) or polyethylene (PE) plastics, resulting in durable paving, resistant to rutting and cracking. Methods include mixing RAS or PE as an additive to a designed mix containing loose aggregate and a virgin binder such as asphalt or tar and compacting the mix onto a paving substrate.
Claims17
A method of asphalt paving, comprising:
- obtaining a designed mix comprising loose aggregate, a virgin binder, and optionally recycled asphalt pavement (RAP);
- adding recycled asphalt shingles (RAS) to the designed mix as an additive to form a RAS mix, wherein RAS is added in an amount sufficient to facilitate compaction;
- and
- compacting the RAS mix on a paving substrate at a compaction temperature.
1 more element
A method of asphalt paving, comprising:
- obtaining a designed mix comprising loose aggregate and a virgin binder;
- adding polyethylene (PE) to the designed mix as an additive to form a PE mix, wherein PE is added in an amount sufficient to facilitate compaction;
- and
- compacting the PE mix on a paving substrate.
1 more element
Dependencies are inferred from the claim text.