Compositions: coating or plastic – Coating or plastic compositions – Bituminous material or tarry residue
Patent
1976-08-26
1980-01-08
Morris, Theodore
Compositions: coating or plastic
Coating or plastic compositions
Bituminous material or tarry residue
404 72, 404 79, C04B 1330, C08L 9500
Patent
active
041826310
ABSTRACT:
In a process for producing asphalt-aggregate compositions in a conventional type dryer-mixer drum in which aggregate is exposed directly to flame and hot gases of combustion while it cascades in the rotating drum, and in which the flame and hot gases of combustion are directed into an input end of the drum, the improvement comprises separating the aggregate into a plurality of different portions or increments each having different particle size ranges, introducing the coarse or larger aggregate particles into the drum and directly exposing them to the flame, its radient heat, hot gases of combustion at the input end, and introducing the finer or smaller aggregate particles downstream from the input end and away from direct exposure to the flame and extremely hot gases in a temperature zone which will avoid overheating the fine particles. The improved apparatus includes means for introducing the coarse particles at the input drum end for direct exposure to the flame or hottest gases and means for introducing the fine or smaller particles in a cooler zone of the apparatus.
REFERENCES:
patent: 1836261 (1931-12-01), Madsen
patent: 1954997 (1934-04-01), Hirzel
patent: 3547411 (1970-12-01), Sowell
patent: 3614071 (1971-10-01), Brock
patent: 3832201 (1974-08-01), Shearer
patent: 3840215 (1974-10-01), McConnaughay
patent: 3866888 (1975-02-01), Dydzyk
patent: 3971666 (1976-07-01), Mendenhall
patent: 3999743 (1976-12-01), Mendenhall
The Asphalt Handbook, Jul., 1962 Edition, Manual Series No. 4, 1962 _Published by The Asphalt Institute College Park, Maryland Jul., 1962 _(pp. 132 & 131 relied on) TE 270A65 1962 C.3.
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