Method of making a load bearing surface using phosphogypsum and

Details Method of making a load bearing surface using phosphogypsum and Method of making a load bearing surface using phosphogypsum and

1982-11-12

1984-05-15

Purser, Ernest R.

Road structure, process, or apparatus

Pavement

Including bed

404 82, 404 75, 427136, 264 34, E01C 706, E01C 732

Patent

active

044485662

ABSTRACT:
A method of making a load bearing surface comprising mixing flyash with phosphogypsum in predetermined amounts to form a subbase disposed on a subgrade, sequentially spraying water onto the subbase and compacting for a plurality of cycles until the materials therein are intimately mixed, densified, and the subbase layer is saturated with water. A base layer comprising a mixture of flyash and phosphogypsum in predetermined amounts is disposed on the subbase layer and sequentially sprayed with water and compacted for a plurality of cycles until the materials therein are intimately mixed, densified, and the base layer is saturated with water. The load bearing surface produced has CBR values ranging from 50 to 90 at 0.1 inch penetration.

REFERENCES:
patent: 3854968 (1974-12-01), Minnick et al.
patent: 4353749 (1982-10-01), Ray et al.
patent: 4374672 (1983-02-01), Funston et al.

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