Heritage Research Group

Firestone Polymers, LLC

Other

Firestone Polymers, LLC & Heritage Research Group

Timothy P Reece

Herbert L Wissel

Daniel F Graves

Christine M Rademacher

Peter W Boerner

Anthony J Kriech

Marvin Keller Exline

William L Hergenrother

Herb Wissel

Peter Boerner

Herbert J Wissel

Herbert Wissel

Gun stand

A method of sealing pavement joints includes the steps of dispensing a first band of void reducing joint composition on a substrate. Applying a first pass of pavement over at least a portion of the void reducing joint composition. Dispensing a second pass of void reducing joint composition on the substrate. Applying a second pass of pavement of the second band of void reducing joint composition and against an edge of the first pass of pavement.

Void reducing asphalt membrane composition, method and apparatus for asphalt paving applications

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.

A roadway structure that includes: a substrate; a hot mix application portion positioned over the substrate, wherein said hot mix application portion comprises first and second adjacent paving passes defining a longitudinal joint, and wherein the first and second adjacent paving passes contain air voids along the longitudinal joint; and a spray-applied band of void reducing joint composition positioned between the substrate and the hot mix application portion, wherein the band is below the longitudinal joint, and wherein at least at portion of the void reducing joint composition fills at least some of the air voids.

A method of forming a pavement construction joint that involves dispensing a band of a void reducing joint composition on a substrate using at least one spray application vehicle, wherein the band comprises a width of about 4 to about 24 inches. A paving pass is applied over the band of joint composition, wherein the paving pass is positioned against an edge of a previously laid portion of pavement to form a pavement construction joint having a volume of air voids. At least a portion of the joint composition migrates upward to reduce the volume of air voids. 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.

A modified-asphalt composition prepared by introducing a diene end-capped block copolymer with a molten asphalt composition, where the block copolymer is defined by the formula&#x3b1;-(D-V-d)where each D is independently a polydiene block, each V is independently a vinyl aromatic block, each d is a polydiene end cap, &#x3b1; is a coupling moiety, and x is an integer from 2 to 10.

Polymer-modified asphalt compositions

A modified-asphalt composition prepared by introducing a diene end-capped block copolymer with a molten asphalt composition.

A modified asphalt binder composition prepared by combining asphalt binder, phosphorus pentasulfide, and less than 2.5 parts by weight unsaturated polymer, per 100 parts by weight asphalt binder, to thereby produce a modified asphalt binder composition characterized by an elongation recovery at 25&#xb0; C., as determined according to AASHTO T301, of greater than 75%.

Modified asphalt binders and asphalt paving compositions

A modified asphalt binder composition prepared by combining asphalt binder, phosphorus pentasulfide, and less than 2.5 parts by weight unsaturated polymer, per 100 parts by weight asphalt binder, to thereby produce a modified asphalt binder composition characterized by an elongation recovery at 25&#xb0; C., as determined according to AASHTO T301, of greater than 75%, where the phosphorus pentasulfide includes a blend of PSand PS.

A process for preparing a modified asphalt binder composition, the process comprising mixing asphalt, an unsaturated polymer, and an organothionating agent to form a modified asphalt composition.

A method for forming a modified asphalt binder composition, the method comprising preparing a phosphorus pentasulfide-binder concentrate by introducing and mixing phosphorus pentasulfide and asphalt binder, where the phosphorus pentasulfide-binder concentrate includes greater than 0.5 parts by weight phosphorus pentasulfide per 100 parts by weight asphalt, preparing a polymer-binder concentrate by introducing and mixing polymer and asphalt binder, where the polymer-binder concentrate includes greater than 5 parts by weight polymer per 100 parts by weight asphalt, and introducing and mixing the phosphorus pentasulfide-binder concentrate with the polymer-binder concentrate to form a modified asphalt binder composition, where the phosphorus pentasulfide includes a blend of PSand PS.

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Indianapolis, IN, United States of America

Timothy P Reece