Method and apparatus for recycling asphalt-aggregate composition

Details Method and apparatus for recycling asphalt-aggregate composition Method and apparatus for recycling asphalt-aggregate composition

1977-12-27

1979-12-04

Morris, Theodore

Compositions: coating or plastic

Coating or plastic compositions

Bituminous material or tarry residue

366 25, B28C 122, C08L 9500

Patent

active

041770803

ABSTRACT:
In a process for producing asphalt-aggregate composition in which used asphaltic concrete is recycled by being heated and mixed in a rotatable drum into which flame and hot gases of combustion are directed, the improvement comprises introducing virgin aggregate in a hot zone of the drum and directly exposing the aggregate to the flame and/or hot gases of combustion, and introducing particles of asphalt-aggregate composition downstream from the hot drum input end, away from direct exposure to the flame and extremely hot gases, in a cooler temperature zone. An improved apparatus includes means for introducing the aggregate at the input drum end for direct exposure to the flame or hottest gases, and means for introducing the used and recycled asphalt-aggregate composition in a cooler drum zone.

REFERENCES:
patent: 2073907 (1937-03-01), Scullin
patent: 3249452 (1966-05-01), Plumb
patent: 3352702 (1967-11-01), Leithner et al.
patent: 3868262 (1975-02-01), Ohlson
patent: 3868263 (1975-02-01), McConnaughay
patent: 3999743 (1976-12-01), Mendenhall
patent: 4096588 (1978-06-01), Mendenhall
patent: 4147436 (1979-04-01), Garbelman
The Asphalt Handbook, Jul. 1962 Edition, Manual Series No. 4, 1962, Published by The Asphalt Institute, College Park, Maryland, Jul. 1962, (pp. 132 and 131 relied on).

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