The present invention relates to asphalt compositions. The present invention provides for a sulfur rubber asphalt binder composition that includes a base asphalt having a softening point, elemental sulfur, and a recycled crumb rubber material. The crumb rubber material is combined with the base asphalt and the elemental sulfur to create the sulfur rubber asphalt binder composition. The crumb rubber material is present in the sulfur rubber asphalt binder in an amount effective to increase the softening point as compared to the softening point of the base asphalt.

The invention relates to a bitumen/polymer composition and to its process of manufacture. The bitumen/polymer composition includes first bitumen base having an intrinsic stability S of greater than 2.5 and/or a degree of peptization S.sub.a of greater than 0.60, and a second bitumen base having an intrinsic stability S of less than or equal to 2.50 and/or a degree of peptization S.sub.a of less than or equal to 0.60, an elastomer and an olefinic polymer adjuvant functionalized by at least glycidyl functional groups. The values of intrinsic stability S and of the degree of peptization S.sub.a are measured according to the standard ASTM D 7157-12. The bitumen/polymer composition exhibits improved low-temperature mechanical properties.

A method of mixing a crosslinking blend in a portable tote for use to crosslink polymer modified asphalts. The method includes providing a portable tote, where the tote includes a tank having a sidewall, a top and a bottom portion. Fixedly positioned partially within the tank interior is an air mixing system that includes a hollow wand that has a distal and a proximal end. The proximal end of the wand exits the tank. The distal end of the tote is connected to at least one accumulator plate, where the accumulator plate is adjacent to the interior bottom portion of the tank. Stored in the interior of the tank is a crosslinking blend suitable for use to crosslink polymer modified asphalts. The method includes the steps of attaching a pulsed gas controller to the proximal end of the wand and coupling a source of compressed gas to the controller, then activating the controller to cause mixing of the crosslinking blend by pulsing gases into the crosslinking blend for a sufficient period of time. After, or during mixing, the crosslinking blend is discharged from the interior of the tank, and the controller is removed from the wand, leaving said wand attached to the tank.

A method of installing an asphalt pavement, which method involves: identifying a surface to be paved; applying a non-tracking layer of binder composition to the surface; and permitting the application of an asphalt layer over the non-tracking layer of binder composition. The binder composition consists essentially of: at least one asphalt binder; at least one elastomer; and ethylene bis stearamide. In a further embodiment the binder composition consists essentially of: at least one asphalt binder; at least one elastomer; sulfur; and ethylene bis stearamide. The composition is applied as a tack coat and/or a stress absorbing membrane interlayer and is non-tracking.

The present invention provides a polymer comprising conjugated diene monomer units and vinyl aromatic monomer units, wherein the polymer has a polymer block (A) comprising principally vinyl aromatic monomer units, and a polymer block (B) comprising conjugated diene monomer units and vinyl aromatic monomer units, and has a Bragg spacing of 27 nm or larger and 50 nm or smaller.

Asphalt binders and methods for making and using same. In at least one specific embodiment, the asphalt binder can include a bitumen and a glyceride and fatty acid mixture. The glyceride and fatty acid mixture can include one or more triglycerides, at least 1 wt % of one or more diglycerides, and at least 5 wt % of one or more fatty acids, based on the combined weight of the one or more triglycerides, the one or more diglycerides, and the one or more fatty acids. The asphalt binder can be made by combining a bitumen and a glyceride and fatty acid mixture. A paving composition can be made by combining a plurality of solids and the asphalt binder. A road can include a plurality of solids mixed with the asphalt binder.

The present invention relates to asphalt compositions. The present invention provides for a sulfur rubber asphalt binder composition that includes a base asphalt having a softening point, elemental sulfur, and a crumb rubber material. The crumb rubber material is combined with the base asphalt and the elemental sulfur to create the sulfur rubber asphalt binder composition. The crumb rubber material is present in the sulfur rubber asphalt binder in an amount effective to increase the softening point as compared to the softening point of the base asphalt.

Asphalt binders and methods for making and using same. In at least one specific embodiment, the asphalt binder can include a bitumen and a glyceride and fatty acid mixture. The glyceride and fatty acid mixture can include one or more triglycerides, at least 1 wt % of one or more diglycerides, and at least 5 wt % of one or more fatty acids, based on the combined weight of the one or more triglycerides, the one or more diglycerides, and the one or more fatty acids. The asphalt binder can be made by combining a bitumen and a glyceride and fatty acid mixture. A paving composition can be made by combining a plurality of solids and the asphalt binder. A road can include a plurality of solids mixed with the asphalt binder.

A binder composition for asphalt pavements that includes: an asphalt binder; an elastomeric polymer; a wax modifier; and optionally 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 applied as a tack coat and/or a stress absorbing membrane interlayer and is non-tracking.

An asphalt binder composition includes a base asphalt binder, low-density polyethylene (LDPE), and sulfur. The LDPE includes LDPE 70. The base asphalt binder is blended with the LDPE and the sulfur.