Surface-Tech LLC

Road Science, LLC

Other

Semmaterials, L.p.

Kmc Enterprises, Inc.

Bakelite Chemicals LLC

Phillip B Blankenship

Joseph A Dennis

Richard Kent Steger

Steven Santa Cruz

Joseph Drbohlav, Iii

Michael L Hines

James J Barnat

James D Campbell

Richard Walter May

Todd Lynn

Jason Bausano

Jehna Dent

Tim McKinney

The Present disclosure is related to hot-mix asphalt ('HMA') for asphalt cement concrete (“ACC”) pavement. Equivalent-performing pavement may be made at lower cost, or higher-performing pavement may be made at equivalent-to-prior-art cost. The amendments, recycled asphalt pavement (“RAP”, and including recycled asphalt shingles [“RAS”]), and reinforcing fiber (aramid fiber) may be adjusted as described herein to achieve a desired price/performance target.

Methods and compositions to increase performance of asphalt cement concrete comprising recycled asphalt pavement

The Present disclosure is related to hot-mix asphalt ('HMA') which open new price/performance areas to asphalt cement concrete (“ACC”) pavement. Equivalent-performing pavement may be made at lower cost, or higher-performing pavement may be made at equivalent-to-prior-art cost. The amendments, recycled asphalt pavement (“RAP”, and including recycled asphalt shingles [“RAS”]), and reinforcing fiber (aramid fiber) may be adjusted as described herein to achieve a desired price/performance target.

An asphalt-cement concrete ('ACC') interlayer formed of a plant-mix material reinforced with aramid fibers, deposited at a thickness of at least one inch (1&#x2033;) over a Portland-cement concrete ('PCC') or ACC base, can extend the service life of a hot-mix asphalt (&#x201c;HMA&#x201d;) surface layer installed over the interlayer by retarding or preventing &#x201c;reflected&#x201d; cracks&#x2014;cracks in the surface layer that correspond to cracks, damage and irregularities in the PCC or ACC base. When the surface layer's useable life has expired, it can be removed and replaced, and the interlayer can continue to protect the new surface layer.

Asphalt cement concrete interlayer system for reflective crack relief

Embodiments of the invention are amendments to hot-mix asphalt ('HMA') which open new price/performance areas to asphalt cement concrete ('ACC') pavement. Equivalent-performing pavement may be made at lower cost, or higher-performing pavement may be made at equivalent-to-prior-art cost. The amendments, recycled asphalt pavement (&#x201c;RAP&#x201d;, and including recycled asphalt shingles [&#x201c;RAS&#x201d;]), and reinforcing fiber (aramid fiber) may be adjusted as described herein to achieve a desired price/performance target.

A method of selecting a crack resistant layer to be applied to an existing surface, the method comprising the steps of: selecting at least one bituminous binder to examine, where the bituminous binder comprises bitumen and one or more polymers, where the one or more polymers include a sufficient amount of conjugated diene such that at least 2.5% of the bituminous binder's weight comprises conjugated diene, preferably at least 3.0%, more preferably at least 3.5%, and most preferably 4.0%; forming at least one bituminous mixture comprising the bituminous binder and an aggregate; testing each bituminous binder for binder fracture energy properties; and selecting a bituminous binder for use in the crack resistant layer. The method may further comprise the steps of testing the bituminous mixture for fatigue properties and selecting the bituminous binder for use in the crack resistant layer based on fatigue properties and binder fracture energy properties, and/or testing the bituminous mixture for fracture energy and selecting the bituminous binder for use in the crack resistant layer based on mixture fracture energy properties and bituminous binder fracture energy properties.

Crack resistant layer with good binder fracture energy properties and method of selecting same

A highly strain tolerant, substantially moisture impermeable, reflective crack relief interlayer is provided. The interlayer includes a polymer modified asphalt binder mixed with a dense fine aggregate mixture containing a substantial amount of manufactured sand. The interlayer mix is designed using a fatigue test and a stability test. Preferably, a hot mix asphalt overlay that is compatible with the interlayer, as well as the demands of local traffic and climate, is placed over the interlayer so that a protected, smooth paved surface is provided. The interlayer may delay the first appearance of cracks and the severity of cracks for several years compared with traditional hot mix overlays and extend pavement service life.

Reflective crack relief pavement interlayer with improved load bearing capacity and method for designing interlayer

A system for repairing roads is provided. The system includes a highly strain tolerant, substantially impermeable, reflective crack relief interlayer. The interlayer includes a polymer modified asphalt binder mixed with a dense fine aggregate mixture. About 100% of the aggregate should be able to pass through about a 9.5 mm sieve. The interlayer mix is designed using volumetrics and verified using a Flexural Beam Fatigue test and a Hveem Stability test. Preferably, an HMA overlay that is compatible with the interlayer, as well as the demands of local traffic, is placed over the interlayer so that a protected, smooth road surface is provided. The system may delay the first appearance of cracks and the severity of cracks for several years compared with traditional hot mix overlays and extend pavement service life.

Method for selecting an asphalt mixture for making an interlayer and method of making an interlayer

A design method for making a bituminous mixture that is used to form a vapor-permeable layer of pavement is provided. This design procedure includes preparing one or more bituminous mixture test specimens, measuring the performance of these specimens, and selecting a desirable bituminous mixture for paving that is vapor-permeable based on the performance of the specimens. Another aspect of the present invention is the selected bituminous mixture, which includes aggregate and a bituminous binder. The aggregate should be selected such that no more than about 5% by mass of the aggregate and preferably no more than about 3.5% by mass of the aggregate is able to pass through a 75 &#x3bc;m sieve. The selected bituminous mixture should have an Air Permeability Value that is at least about 8 cmso as to reduce its propensity for blistering during and after construction. Still further, the selected bituminous mixture should have desirable fatigue resistance and should be substantially water-impermeable.

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Wichita, KS, United States of America

Phillip B Blankenship