Method and apparatus for recycling asphalt- aggregate...

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

C - Chemistry, Metallurgy

08

L

6/169

C08L 95/00 (2006.01) E01C 19/10 (2006.01)

Patent

CA 1118157

IMPROVED METHOD AND APPARATUS FOR RECYCLING ASPHALT-AGGREGATE COMPOSITIONS ABSTRACT In a process for producing asphalt-aggregate composition in which used asphaltic concrete is recy- cled 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 compo- sition 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.

318541

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