Embodiments of the present invention are directed to compositions and methods for a thermoplastic paving composition including an asphalt rubber binder and a polyethylene polymer additive.

A mixture made from or containing

T1) from 99 wt % to 75 wt % of bitumen, and
T2) from 1 wt % to 25 wt % of a polymer composition made from or containing
A) 5-35% by weight of a propylene homopolymer or a propylene ethylene copolymer;
B) 20-50% by weight of a copolymer of ethylene and a C.sub.3-C.sub.8 alpha-olefin containing from 1.0% to 20.0% by weight of alpha-olefin units; and
C) 30-60% by weight of a copolymer of ethylene and propylene containing from 25.0% to 75.0% by weight of ethylene derived units.

A bitumen having the properties of a Newtonian liquid is a mixture of a first oil pitch made of particles of soot and saturated oils and a second oil pitch made of aromatic oils and resins, characterized in that the first oil pitch has saturated oils at a content of at least 10% in wet weight and the second oil pitch has aromatic oils at a content of at least 10% in wet weight.

Plastomer-modified asphalt binders meeting MSCR specifications, asphalt paving materials with such asphalt binders, and methods for fabricating such asphalt binders are provided. The asphalt binder contains a base asphalt and a plastomer. If the plastomer has a drop point no greater than about 139° C., the asphalt binder further contains sulfur; sulfur-containing compounds, such as hydrocarbyl polysulfides and thiuram disulfides; phenolic resins; metal oxides; or a combination thereof. The asphalt binder is substantially free of elastomer.

A solid bitumen pellet, including a mixture of bitumen and an additive, where the additive operates to increase the viscosity of the mixture. Optionally, the pellet includes a protective shell.

The invention relates to a method for manufacturing a road pavement comprising pipes of a device for a heat exchanger, comprising the following steps: a) digging a course to create grooves extending in a same direction and strips connecting the grooves, then b) laying the pipe having a crushing strength higher than 2 000N per linear metre of pipe at 100° C. into the grooves created in step a); and then c) filling the empty space left free by the pipe in the grooves with an asphalt mix having a working temperature lower than 160° C., based on: a hydrocarbon binder, at least 90% by weight, with respect to the total weight of the asphalt mix, of an aggregate fraction the elements of which have dimensions less than 10 mm, and comprising from 30% to 60% by weight, with respect to the total weight of the aggregate fraction, of sand, d) applying a surface course for a road pavement.

Provided herein is an asphalt binder composition, and more particularly, an amine-containing asphalt binder composition capable of improving mixability between an asphalt binder and an aggregate, and compactibility and water resistance of an asphalt paving mixture. More particularly, the present invention relates to an asphalt binder composition capable of being used in hot mix asphalt for improving workability and/or stripping-resistance, warm-mix asphalt, recycling of reclaimed asphalt pavement, or the like.

Disclosed is a micro-surfacing sealing coat mixture, comprising the following raw materials in parts by weight: 10-20 parts of a cationic emulsified asphalt, 5-7 parts of an ethylene-1-octene copolymer, 3-6 parts of an organic silicone resin, 8-12 parts of a filler, 80-90 parts of an aggregate, 2-4 parts of a ditertiarybutyl peroxide, 20-30 parts of water, and 0.5-2 parts of an accelerator. The method for preparing the micro-surfacing sealing coat mixture comprises: weighing raw materials other than the filler, aggregate and water, adding to a high-speed shear emulsifier and mixing at a temperature of 170-175° C. for 20-35 min, then continuously shearing at 3000-3500 r/min for 60 min to obtain a modified emulsified asphalt; cooling the modified emulsified asphalt to 20-30° C., adding the filler, aggregate and water thereto, and adding the resulting mixture to a mixer to mix evenly to obtain the micro-surfacing sealing coat mixture.

Asphalt modifier packages and rubber-modified asphalts including the packages are described. Asphalt modifier packages can include an amine functionalized wax and an elastomeric polymer in conjunction with ground tire rubber. Asphalt modifiers can include a ground tire rubber compounded with a reactive elastomeric terpolymer. Rubber-modified asphalts can exhibit an excellent stability of the ground tire rubber additive. Rubber-modified asphalts can exhibit a storage stability separation factor of about 6° F. or less, an MSCR J.sub.nr value of from about 0.05 to about 2 at 3.2 kPa and 67° C., and an MSCR percent recovery of from about 20% to about 75% at 3.2 kPa and 67° C.

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.