This invention encompasses rubber modified asphalt cement compositions, as well as systems, apparatuses, methods for preparing, as well as methods for using rubber-modified asphalt cement compositions.

A pavement repair system is provided utilizing solid phase auto regenerative cohesion and homogenization by liquid asphalt oligopolymerization technologies. The system is suitable for use in repairing asphalt pavement, including pavement exhibiting a high degree of deterioration (as manifested in the presence of potholes, cracks, ruts, or the like) as well as pavement that has been subject to previous repair and may comprise a substantial amount of dirt and other debris (e.g., chipped road paint or other damaged or disturbed surfacing materials). A system utilizing homogenization by liquid asphalt oligopolymerization is suitable for rejuvenating or repairing aged asphalt, thereby improving properties of the paving material.

An asphalt additive comprising a primary rheology modifying component and a secondary rheology modifying component, and asphalt compositions and products having such additive incorporated therein. The primary rheology modifying component is generally a polymer, and the secondary rheology modifying component may comprise a petroleum micro-wax.

Disclosed are a hydroxyl-terminated polybutadiene-based polyurethane (HTPB-PU)-modified asphalt and a preparation method thereof. In the disclosure, the HTPB-PU-modified asphalt includes the following components in parts by weight: 90 parts to 97 parts of a base asphalt and 3 parts to 10 parts of HTPB-PU, where the HTPB-PU is prepared from raw materials including an isocyanate and a polyol, and the polyol includes hydroxyl-terminated polybutadiene (HTPB) with a weight percentage of not less than 80%.

The current invention concerns composition comprising bitumen, one or more plasticity modifying agent(s), and lignin, as well as methods and uses related to such compositions. In particular, compositions are disclosed with improved properties, such as mixing properties.

A method for generating a polymer modified oxidized asphalt is described. The method includes receiving a plurality of polymerizing concentrate components including an aromatic oil, a saturated polymer, an oxidized polymer, and polyisobutylene (PIB). The polymerizing concentrate components are then heated to between 350? F. and 450? F. with mixing for between 1 and 7 hours to generate a polymerizing concentrate. The method then mixes the polymerizing concentrate with oxidized asphalt and heated to between 350? F. and 450? F. with mixing for between 15 minutes and 1 hour to generate the polymer modified oxidized asphalt.

An adhesive bituminous sheath for building includes bitumen and an adhesivizing additive mixed with the bitumen, wherein the adhesivizing additive is an aliphatic and cycloaliphatic resin.

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.

A method for preparing a paving material includes heating an aggregate comprising recycled asphalt pavement using an emitter generating electromagnetic radiation having a wavelength of from 2 microns to 1 millimeter. The method utilizes solid phase autoregenerative cohesion to prepare a material suitable for use as an aggregate in a hot mix asphalt pavement installation.

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.