Strain tolerant recycled asphalt pavement composition
AssigneeArrMaz Products Inc.
InventorsMichael William Longshaw, Corey Dean Christian
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Abstract
A strain tolerant recycled bitumen pavement composition comprising aggregate, recycled bitumen, and a specialized polymer modified bitumen. The specialized polymer modified bitumen may comprise bitumen and polymer, where the polymer comprises a preponderance of butadiene. The amount of recycled bitumen in the composition may be greater than 5% of the composition. Such high levels of recycled bitumen in a pavement composition, while desirable both economically and environmentally, typically produces layers with poor strain tolerance. The strain tolerance of the layer produced with the composition of the present invention, however, may be significantly higher due to the inclusion of the specialized polymer modified bitumen.
Claims36
A composition comprising:
- aggregate;
- recycled bitumen;
- and
- a specialized polymer modified bitumen, where the specialized polymer modified bitumen comprises:
- bitumen;
- and
- specialized polymer, where the polymer comprises a preponderance of butadiene.
A method for creating a strain tolerant layer, the method comprising:
- mixing aggregate, recycled bitumen, and a specialized polymer modified bitumen to produce a bituminous pavement composition, where the specialized polymer modified bitumen comprises:
- bitumen;
- and
- specialized polymer, where the polymer comprises a preponderance of butadiene;
- and
- using the bituminous pavement composition to produce the strain tolerant layer, where the strain tolerant layer has a strain tolerance of greater than 10,000 cycles to failure at 1000 microstrain, 15 C, and 10 Hz.
Dependencies are inferred from the claim text.