Lightweight aggregate

Details Lightweight aggregate Lightweight aggregate

1974-07-19

1976-06-08

Poer, J.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

C04B 702

Patent

active

039619737

ABSTRACT:
A lightweight aggregate for use in concrete mixes with Portland cement consists essentially of bottom ash produced as a by-product of burning pulverized coal in a dry-bottom furnace. The ash is sized to remove particles substantially exceeding 3/8 inch in diameter. It is substantially free of iron pyrites and sulfur trioxide to provide a lightweight aggregate which is inert, non-reactive, and meets the requirements for such aggregate as defined in ASTM specifications C-330, C-331 and C-332. Methods of producing this aggregate material are disclosed, including a method for recovering the same from the waste product ash in a power plant sluicing pond. Concrete mixes and products are disclosed in which such ash consists of the lightweight aggregate.

REFERENCES:
patent: 2250107 (1941-07-01), Nelles
patent: 2315732 (1943-04-01), Patch
patent: 2414734 (1947-01-01), Gelbman

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