The present invention relates to systems and methods for mixing various components of asphalt concrete in a mixer and then dispensing the asphalt concrete from the mixer. While the mixer can include any suitable component, in some instances, it includes a heated container, a mixing mechanism that is configured to mix asphalt and an aggregate to form the asphalt concrete within the heated container, and an auger that is configured to force the asphalt concrete out from the heated container. In some cases, a portion of the auger is disposed in a heated cover. In some cases, the cover further comprises a gate that is configured to open (and close) to allow the asphalt concrete to flow from (and be retained in) the heated container. Other implementations are also described.

A process for solvent extraction of bitumen from mined oil sand ore is provided, comprising mixing the mined oil sand ore with at least one solvent to produce a solvent/oil sand slurry; adding water to the solvent/oil sand slurry to produce a slurry having a water-to-solids mass ratio of less than about 0.1; mixing the slurry in a mixing tank having a diameter to agglomerate the solids present in the slurry, the mixing tank operating at a power input of between 20 and 50 W/kg of slurry, to produce an agglomerated slurry; and subjecting the agglomerated slurry to solid-liquid separation to produce a first liquids stream containing bitumen and a first solids stream; whereby the slurry height in the mixing tank is 0.1 to 0.3 of the tank diameter.

The present invention provides a self-rotating asphalt emulsification mixing production apparatus, which relates to a technical field of construction engineering. It includes a rotatable inner tank, arranged in an outer tank, wherein the inner tank is provided with a blending shaft; a second blending blade, distributed on an outer wall of the inner tank; the emulsification tank is provided with a partition plate, an overfeed hole is provided at a center of the partition plate; a rotary shaft is provided at a center of the emulsification tank, and the rotary shaft is connected with the blending shaft through the overfeed hole; a first disk and a second disk are provided on the rotary shaft. The present invention can carry out more efficient mixing of the asphalt, better heating uniformity, and at the same time realize a integrated processing of the mixing and emulsification of asphalt and soap.

Mobile mixing attachments, skidsteers with mobile mixing attachments, mobile mixing devices and related methods are provided. A mobile mixing attachment for use on a skid-steer can include a rotatable mixing drum having a body that forms an internal cavity and having a forward end and a bottom end. The mixing drum can include a mouth at the forward end of the body that provides access to the internal cavity of the mixing drum. The mobile mixing attachment can include a drum chassis configured to hold and rotate the mixing drum and an attachment plate secured to a rear portion of the drum chassis proximal to the bottom end of the body. The attachment plate configured to engage one or more attachment couplers on lift arms of a skid-steer. The mobile mixing device also comprises a scoop comprising a forward scooping lip and a rear loading end positioned in front of the mouth of the mixing drum. The scoop is secured to the drum chassis.

A method of making asphalt concrete mixtures including reclaimed asphalt pavement (RAP). Variability in the fraction of binder that occurs in RAP that is able to melt and mix with virgin binder included in the concrete mixture previously made it difficult to select an appropriate amount of virgin binder. Methods described herein permit an asphalt concrete mix designer to determine the amount of virgin binder that can be combined with RAP and virgin aggregate in order to satisfy the minimum effective binder content of a job mix formula for such a concrete mix. The subject matter described herein thus permits more efficient use of RAP and permits use of RAP in higher amounts in asphalt concrete mixtures.

An apparatus for producing hot mix asphalt from 100% recycled pavement aggregates includes a rotatable inclined drum having a central axis and having a first and second end. A heat source spaced from one of the ends introduces hot gas into the drum via one of the first and second ends. An aggregate supply introduces aggregate into the drum through one of the first and second ends. A RAP collar spaced from the ends and positioned around the drum is used to introduce sand through openings beneath the collar into the drum as the drum is rotated. The RAP collar has an annular heat and smoke shield fastened around the drum for minimizing escape of hot gas from the drum openings beneath the RAP collar. The drum has replaceable buckets within the openings for receiving, holding and distributing sand into the drum as the drum rotates about its axis.

The present invention relates to process for the preparation of an asphalt mix composition, said process comprising: (1) heating an asphalt composition to a temperature in the range of from 110 to 190 C. to obtain a first input stream; (2) providing one or more thermosetting reactive compounds to obtain a second input stream; and (3) homogenizing the streams of (1) and (2) in at least a first tank fitted with a rotor stator.

Foamed asphalt compositions, recycled asphalt compositions, asphalt pavement, and methods of forming asphalt pavement using the foamed asphalt compositions are provided herein. An exemplary foamed asphalt composition is in a cellular matrix form and includes a base asphalt component and oxidized high density polyethylene. An exemplary asphalt pavement includes a recycled asphalt layer that includes the foamed asphalt composition and a recycled asphalt component. An exemplary method of forming asphalt pavement includes combining a base asphalt component and an oxidized high density polyethylene to form an asphalt mixture. The asphalt mixture is foamed using water and compressed air to form a foamed asphalt composition. The foamed asphalt composition and a recycled asphalt component are combined to form a recycled asphalt composition. A recycled asphalt layer is formed with the recycled asphalt composition.

A method of making hot mix asphalt using recycled asphalt in which tertiary air is mixed with products of combustion at an exit of a refractory-lined chamber to produce hot controlled temperature process air, the temperature of the tertiary air being increased while the temperature of the products of combustion is decreased to adjust a temperature of the hot controlled temperature process air. Particles of the recycled asphalt are heated by exposing the particles to the hot controlled temperature process air in the rotary counter-flow dryer and mixer and moisture is removed from the recycled asphalt with the hot controlled temperature process air.

The present invention relates to systems and methods for mixing various components of asphalt concrete in a mixer and then dispensing the asphalt concrete from the mixer. While the mixer can include any suitable component, in some instances, it includes a heated container, a mixing mechanism that is configured to mix asphalt and an aggregate to form the asphalt concrete within the heated container, and an auger that is configured to force the asphalt concrete out from the heated container. In some cases, a portion of the auger is disposed in a heated cover. In some cases, the cover further comprises a gate that is configured to open (and close) to allow the asphalt concrete to flow from (and be retained in) the heated container. Other implementations are also described.