Method of and apparatus for asphaltic concrete hot mix recycling

Details Method of and apparatus for asphaltic concrete hot mix recycling Method of and apparatus for asphaltic concrete hot mix recycling

1980-05-19

1982-03-09

Jenkins, Robert W.

Agitating

Mortar mixer type

Methods

366 7, 366 25, B28C 506, B28C 520, B28C 546

Patent

active

043186190

ABSTRACT:
A method of hot mix recycling of old asphaltic concrete paving heats the old pavement, after it has been removed and sized, to a temperature below its firing point and heats fresh aggregate to a greater temperature before combining the two and adding new asphalt. The method is embodied in a drum-mixer type of apparatus modified by inserting a smaller drum in the upstream portion of the large drum. The burner fires into the smaller drum into which the fresh aggregate only is introduced while the old mix (plus additional fresh aggregate in certain cases) is introduced into the annular space between the two drums, the fresh aggregate and the old mix being thereafter combined in the large drum, new asphalt added and the mix further heated.

REFERENCES:
patent: 3832201 (1974-08-01), Shearer
patent: 3999743 (1976-12-01), Mendenhall
patent: 4025057 (1977-05-01), Shearer
patent: 4075710 (1978-02-01), Jakob et al.
patent: 4096588 (1978-06-01), Mendenhall
patent: 4126397 (1978-11-01), Mendenhall
Hot Mix Recycling of Asphalt Pavements, by Charles R. Foster, (7-1975), National Asphalt Pavement Association (NAPA).
State of the Art, Hot Mix Recycling, 4-1977, written and published by NAPA.
Recycling Report, 9-1977, by NAPA.

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