Importance

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Abstract

An apparatus and a method for re-mixing size and weight segregated Hot Mix Asphalt ('HMA') which is continuously discharging from a windrow elevator. The apparatus includes an auger assembly having first and second helical auger sections, mounted in spaced relation over respective ends of an auger connecting shaft. The first and second sections are of converging, opposite handedness. Owing to their orientation and handedness, the augers advance incoming material inwardly, toward a mixing zone, adjacent and around an intermediate portion of the connecting shaft. The apparatus also includes an auger housing, having an upper portion with a material inlet, and a lower portion with a material discharge. The auger assembly is mounted for rotation within the lower portion of the auger housing. The housing surrounds side, bottom and end portions of the auger sections. The material inlet is above and in communication with upper portions of the auger sections and the mixing zone. The material discharge is positioned below the mixing zone. Drive devices rotate the auger assembly, so that large pieces of material delivered to the upper portions of the auger sections are continuously advanced inwardly by the auger sections and commingled with small pieces of material delivered to the mixing zone. Under force of gravity, re-mixed material then exits through the material discharge.

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First Claim