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US 4,124,325 AGranted
Asphalt pavement recycling apparatus
AssigneeCutler Repaving, Inc.
InventorEarl F. Cutler
Life of this patent
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AssigneeCutler Repaving, Inc.
InventorEarl F. Cutler
Estimating the term…
Disclosed is a method and apparatus for recycling asphalt concrete roadways. The apparatus includes means for heating the roadway and applying emulsified asphalt thereto prior to scarifying the heated surface. The surface is then scarified so as to loosen the heated asphalt. The scarified material is then treated with asphalt and, if desired, a rejuvenating agent. They are mixed thoroughly to form a hot mix of asphalt concrete from the old road material. New material is added, and mixed with the old material by a pug mill rotor. The combined rejuvenated hot mix is further mixed and leveled by means of screws and then compacted substantially by a vibrating screed. The screed has a continuous bottom plate and a plurality of relatively movable upper sections which are connected by turnbuckles adapted to be adjusted for bending the bottom plate of the screed to conform to the contour of the road crown. Final compaction of the road surface is obtained by rollers.
A method of restoring an asphalt road, comprising the steps of:
A method of restoring an asphalt roadway comprising the steps of:
A screed structure for use in apparatus of the type described comprising a bottom plate member engageable with a surface to be processed, a front edge member adjustably fixed in one of a number of positions along a forward edge of said plate member, said front edge member including a plurality of circumferentially spaced wear surface portions, and means adjustably fixing said front edge member for enabling said wear surface portions to be selectively rotated so as to present an undamaged wear surface for engagement with a surface being processed.
Apparatus for restoring a roadway, comprising mobile frame means, means on the frame means for excavating the roadway surface, means for heating the excavated surface, means on the frame means for applying a quantity of asphalt to the excavated heated surface to form a rejuvenated asphalt mix, and vibrating screed means attached to the frame means for compacting the rejuvenated asphalt mix, said vibrating screed means including a yieldable bottom plate, and means for flexing the yieldable bottom plate in accordance with the radius of curvature of the road surface being restored to form a crown for the road surface, said bottom plate including a removable edge member carried in an initial position to provide an initial wear surface for said screed, and means for removing said leading edge member and replacing same when worn in another position on the screed means in a positon rotated from the initial position to provide a new, undamaged wear surface for said screed.
Dependencies are inferred from the claim text.