System for producing bituminous paving mixtures

Details System for producing bituminous paving mixtures System for producing bituminous paving mixtures

1978-04-24

1980-10-21

Taylor, Billy S.

Agitating

Mortar mixer type

With heating or drying

366147, 432 14, B28C 122, B28C 546

Patent

active

042291097

ABSTRACT:
A closed loop system which includes (1) a drum mixer, (2) a heat source separate from the drum mixer for producing a heated gas, (3) intake and exhaust ducts which channel, respectively, the gas produced by the heat source to the intake end of the drum mixer, and the gas at the discharge end of the drum mixer back to one intake of the heat source, and (4) a fan for maintaining the flow of gas in the system. The gas produced by the heat source is between 700.degree. F. and 2000.degree. F. when it enters the drum mixer at its intake end from the intake duct. Graded aggregates and a bituminous binder are fed into the drum mixer at its intake end. The graded aggregates are mixed with the bituminous binder, in the presence of the heated gas, by rotational action of the drum mixer. The resulting bituminous paving mixture is discharged at the discharge end of the drum mixer, along with exhaust gas, a portion of which is channeled back to one intake of the heat source by the exhaust duct.

REFERENCES:
patent: Re29496 (1977-12-01), Dydzyk
patent: 2487887 (1949-11-01), McEachran
patent: 2715517 (1955-08-01), Bojner
patent: 3824065 (1974-07-01), Thompson
patent: 3832201 (1974-08-01), Shearer
patent: 3845941 (1974-11-01), Mendenhall
patent: 4034968 (1977-07-01), Mendenhall
patent: 4039171 (1977-08-01), Shearer
patent: 4074894 (1978-02-01), Mendenhall
patent: 4082498 (1978-04-01), Offergeld
patent: 4130364 (1978-12-01), Brown

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