Pavement aging can be reduced by applying to an asphalt-containing pavement a topcoat layer or a surface treatment containing asphalt binder emulsion with sterols.

Pavement aging can be reduced by applying to an asphalt-containing pavement a topcoat layer or a surface treatment containing asphalt binder emulsion with sterols.

Disclosed herein are asphalt compositions containing a block-copolymer additive, for example for use as a dispersant. In some embodiments, the asphalt compositions can include asphalt, a block-copolymer dispersant, and an SBR latex. The block-copolymers have a molecular weight exceeding 5000 g/mol with a polybutyl acrylate hydrophobic block that attaches to the asphalt particle and a sodium polystyrene sulfonate hydrophilic block for stability, wherein the block copolymer has a first block comprising of alkyl acrylate and a second block comprising units of an ethylenically unsaturated monomer with sulfonic acid groups.

The asphalt compositions can include asphalt in an amount of from 50 wt. % to 95 wt. %, based on the weight of the asphalt composition. In some embodiments, the asphalt compositions can include a styrene-butadiene copolymer in an amount of from 0.05 wt. % to 10 wt. %, based on the weight of the asphalt composition. Methods of making and using the asphalt compositions are also disclosed.

Systems, components, apparatuses and methodologies of the present invention are directed to techniques that ensure that all deck-to-wall, roof-to-wall and other constructions properly protect the home from the environment, particularly along the wetter coastal regions by forming a layered, waterproof seal of metal, plastic and bitumen. A modularized system of components, that overlap each other either over and or under to create a system that meets the design criteria of critical flashing components, each with waterproofing capability either built-in or applied onsite in use, are employed to cover critical building areas prone to water infiltration and damage.

Provided is a composition including at least one bitumen and at least one additive as defined herein. The composition provides emulsions of all types of bitumens, which can be used in the production of cold-poured mixes, having an improved internal strength and a rapid increase in cohesion.

Provided is a composition including at least one bitumen and at least one additive as defined herein. The composition provides emulsions of all types of bitumens, which can be used in the production of cold-poured mixes, having an improved internal strength and a rapid increase in cohesion.

Cold-in-place asphalt recycling is disclosed. A foamed asphalt may be produced by injecting water and optionally compressed air into a hot asphalt stream. A lubricating surfactant may be added to the hot asphalt stream to improve performance. The foamed asphalt may be mixed with reclaimed material to provide a uniformly coated paving material that can compacted to a desired density.

Asphalt emulsions, methods of forming asphalt emulsions, and composite pavement structures formed from the asphalt emulsions are provided herein. In an embodiment, an asphalt emulsion includes a base asphalt component, water, and an oxidized high density polyethylene. The base asphalt component is present in an amount of from about 15 to about 70 weight %, the water is present in an amount of at least about 25 weight %, and the oxidized high density polyethylene is present in an amount of from about 1 to about 20 weight %, where all amounts are based on the total weight of the asphalt emulsion. The oxidized high density polyethylene has an acid value of from about 5 to about 50 mgKOH/g. The asphalt emulsion is free of aggregate and other mineral materials.

Asphalt emulsions, methods of forming asphalt emulsions, and composite pavement structures formed from the asphalt emulsions are provided herein. In an embodiment, an asphalt emulsion includes a base asphalt component, water, and an oxidized high density polyethylene. The base asphalt component is present in an amount of from about 15 to about 70 weight %, the water is present in an amount of at least about 25 weight %, and the oxidized high density polyethylene is present in an amount of from about 1 to about 20 weight %, where all amounts are based on the total weight of the asphalt emulsion. The oxidized high density polyethylene has an acid value of from about 5 to about 50 mgKOH/g. The asphalt emulsion is free of aggregate and other mineral materials.

Various embodiments disclosed relate to asphalt emulsifiers. An emulsifier has the structure R.sup.1—C(O)-A-(CH.sub.2).sub.n—N(R.sup.2) (R.sup.3), or a salt thereof wherein the —N(R.sup.2)(R.sup.3) nitrogen is quaternized as —N.sup.+(R.sup.2)(R.sup.3)(R.sup.4), or an N-oxide thereof wherein the —N(R.sup.2) (R.sup.3) nitrogen is oxidized as —N.sup.+(R.sup.2)(R.sup.3)(O.sup.−). The variable A is —NH— or —O—. The variable R.sup.1 is chosen from (C.sub.4-C.sub.22)alkyl, substituted (C.sub.4-C.sub.22)alkyl, (C.sub.4-C.sub.22)alkenyl, and substituted (C.sub.4-C.sub.22)alkenyl. The variables R.sup.2 and R.sup.3 are each independently chosen from (C.sub.1-C.sub.10)alkyl and substituted (C.sub.1-C.sub.10)alkyl. The variable R.sup.4 is chosen from —H, (C.sub.1-C.sub.20)hydrocarbyl, and substituted (C.sub.1-C.sub.20)hydrocarbyl. The variable n is 1 to 10. Various embodiments include methods of making the emulsifier such as from a fatty acid source and an amine starting material, emulsions including the emulsifier and methods of making the same, and methods of using the emulsion including contacting asphalt or bitumen with the emulsion.