Asphalt mixture

Details Asphalt mixture Asphalt mixture

1979-03-05

1980-09-16

Taylor, Hosea E.

Compositions: coating or plastic

Coating or plastic compositions

Bituminous material or tarry residue

404 80, 404 81, C08L 9500

Patent

active

042227879

ABSTRACT:
A process for preparing an improved asphalt mixture by adding coal materials thereto. Low carbon content coal materials are separated into first and second portions, the first portion being soft-burned at approximately 600.degree. F., and the second portion being exposed to a number of wetting and drying cycles, followed by a thorough leaching. The first and second portions are crushed and screened to produce a fine particulate coal material having a maximum diameter passing through a 200 mesh screen, and a larger size coal material having a maximum diameter of 3/4 of an inch. In a first embodiment, an asphalt paving material is produced by adding the fine particulate coal materials to an asphalt/aggregate mixture in a proportion of approximately 75% of the first portion and approximately 25% of the second portion of the fine particulate coal materials, such that the coal materials equal approximately 6 to 8% by weight of the total mixture. The resulting asphalt mixture is heated at approximately 300.degree. and may be stored at this temperature in order to increase the mechanical bonds between the asphalt and aggregate. In a second embodiment the larger size coal materials and/or the fine particulate coal materials are used as a filter medium to remove pollutants from a liquid effluent stream, and are then added to an asphalt mixture with the fine particulate coal materials in the same proportions as in the first embodiment. The asphalt/coal material mixture is then heated at approximately 300.degree. F. and may be stored for a period of time to increase the mechanical bonds between the asphalt and coal materials. The resulting mixture may be compressed into any desirable shape, the pollutants being effectively sealed within the coal materials, providing safe and efficient long term storage or disposal.

REFERENCES:
patent: 1261645 (1918-04-01), Sutcliffe
patent: 1276429 (1918-08-01), Smith
patent: 1741193 (1929-12-01), Lessing
patent: 1893555 (1933-01-01), Komarek et al.
patent: 3140242 (1964-07-01), Work et al.
patent: 3184293 (1965-05-01), Work et al.
patent: 3926576 (1975-12-01), Schmalfeld et al.

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