Road structure – process – or apparatus – Process
Patent
1993-09-29
1995-09-05
Britts, Ramon S.
Road structure, process, or apparatus
Process
404 8405, 404101, 404108, E01C 726
Patent
active
054473888
ABSTRACT:
A process and apparatus for continuous batch operation for producing an elastomeric asphaltic compound of rubber and asphalt for paving purposes comprising an essentially cylindrical mixing tank containing rotary internal agitators, preferably at three levels within the tank. The apparatus is equipped with a asphalt oil pump, which flows asphalt oil through a pre-heater into the mixing tanks, and with a separate spiral or screw conveyor for loading through the top of the tank a continuous supply of fine rubber at a controllable feed rate. The entire tank is suspended upon a frame supported by load cells so as to provide a continuing measurement of the total weight of the asphalt load and of the added rubber. The temperature of the asphalt oil raised by the pre-heater until substantially all the asphalt oil reacts with the rubber in the time required to flow the mixture through the stirring tanks, providing a continuous flow process for providing paving grade asphalt rubber mixtures.
REFERENCES:
patent: 4069182 (1978-01-01), McDonald
patent: 4272212 (1981-06-01), Bauer, Jr. et al.
patent: 5044819 (1991-09-01), Kilheffer et al.
Britts Ramon S.
O'Connor Pamela A.
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