Void reducing asphalt membrane composition, method and apparatus for asphalt paving applications
First Claim
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1. A method of reducing voids in asphalt pavement joints defined between first and second side-by-side adjacent asphalt paving passes which method comprises:
- providing a joint composition that comprises;
an asphalt binder selected from paving grade asphalts;
an elastomeric polymer;
a wax modifier; and
at least one of fumed silica and fumed alumina;
applying a band of the joint composition to a surface upon which an asphalt pavement joint will be formed between first and second side-by-side adjacent asphalt paving passes;
forming first and second side-by-side adjacent asphalt paving passes on the surface using hot mix asphalt so that a joint defined between the first and second side-by-side asphalt paving passes is aligned over the band of the joint composition,allowing the joint composition to migrate upward into the hot asphalt paving passes so as to reduce air voids in the hot asphalt paving passes in the area of the joint to 7% or less, wherein the at least one of fumed silica and fumed alumina imparts lateral flow resistance and a non-tacky characteristic to the void reducing asphalt membrane composition.
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Abstract
A void reducing asphalt membrane composition for asphalt pavements that includes: an asphalt binder; an elastomeric polymer; a wax modifier; and at least one of: i) fumed silica or fumed alumina; and ii) a saponified fatty acid and a resin acid gelling compound. The composition is resistant to flow when applied and migrates into hot mix asphalt in the area of the longitudinal joint to reduce air voids to 7% or less and reduce water permeability. The composition becomes tack-free quickly after application. The composition bonds to asphalt, concrete, brick, stone and metal.
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Citations
15 Claims
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1. A method of reducing voids in asphalt pavement joints defined between first and second side-by-side adjacent asphalt paving passes which method comprises:
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providing a joint composition that comprises; an asphalt binder selected from paving grade asphalts; an elastomeric polymer; a wax modifier; and at least one of fumed silica and fumed alumina; applying a band of the joint composition to a surface upon which an asphalt pavement joint will be formed between first and second side-by-side adjacent asphalt paving passes; forming first and second side-by-side adjacent asphalt paving passes on the surface using hot mix asphalt so that a joint defined between the first and second side-by-side asphalt paving passes is aligned over the band of the joint composition, allowing the joint composition to migrate upward into the hot asphalt paving passes so as to reduce air voids in the hot asphalt paving passes in the area of the joint to 7% or less, wherein the at least one of fumed silica and fumed alumina imparts lateral flow resistance and a non-tacky characteristic to the void reducing asphalt membrane composition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An asphalt pavement joint composition for constructing join areas between side-by-side asphalt paving passes which joint composition comprises:
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an asphalt binder; an elastomeric polymer; a wax modifier; at least one of fumed silica and fumed alumina; and
a saponified fatty acid and a resin acid gelling compound,wherein the joint composition is formulated to include 85 to 97 wt. % of the asphalt binder, 1 to 6 wt. % of the elastomeric polymer, 1 to 5 wt. % of the wax modifier, 1 to 10 total wt. % of the fumed silica and fumed alumina, and up to 3 total wt. % of the saponified fatty acid and resin acid gelling, whereby at least one of fumed silica and fumed alumina imparts lateral flow resistance and a non-tacky characteristic to the joint composition so that the joint composition resists lateral flow when applied to a surface upon which an asphalt pavement is to be formed, and the joint composition will migrate upward into a hot asphalt paving pass applied over the joint composition and fill voids and reduce water permeability within the hot asphalt pass. - View Dependent Claims (15)
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Specification