Agitating – Mortar mixer type – Methods
Patent
1989-05-15
1991-02-05
Coe, Philip R.
Agitating
Mortar mixer type
Methods
366 25, 366 40, 432111, B28C 526
Patent
active
049899864
ABSTRACT:
A drum mixer is provided for producing an asphaltic composition. The drum mixer utilizes a first heat source located at an intermediate position within the drum mixer for producing a first current of hot gases directed towards the entry end of the drum mixer. The drum mixer also utilizes a second heat source located at the discharge end of the drum mixer for producing a second current of hot gases directed towards the entry end. Virgin aggregate is introduced into the drum mixer at the entry end of the drum mixer and is heated by the first current of hot gases. Recycle material is introduced into a mixing zone within the drum mixer between the first heat source and the discharge end. The heated virgin aggregate combines with the recycle material in the mixing zone and is further heated by the second heat source. Liquid asphalt is mixed with the virgin aggregate and recycle material in the mixing zone and the product is removed from the drum mixer at the discharge end.
REFERENCES:
patent: 3404199 (1968-10-01), Hoffmann
patent: 3423222 (1969-01-01), McConnaughay
patent: 4342554 (1982-08-01), Rohrbach
patent: 4427376 (1984-01-01), Etnyre et al.
patent: 4462793 (1984-07-01), Maeda et al.
patent: 4600379 (1986-07-01), Elliott
patent: 4787938 (1988-11-01), Hawkins
patent: 4913552 (1990-04-01), Bracegirdle
CMI Corporation
Coe Philip R.
Spisich Mark
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