Pozzolan blends

Compositions: coating or plastic – Coating or plastic compositions – Inorganic settable ingredient containing

Patent

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Details

Other Related Categories

106709, 106710, C04B 2822

Type

Patent

Status

active

Patent number

052230350

Description

ABSTRACT:
An unground, fine pozzolan having a sulphur content determined as wt. % SO.sub.3 of 5 to 25 wt. % is employed in admixture with Portland cement to provide a blended hydraulic cement which has increased compressive strength characteristics as well as extended retardation time without the need for separate addition of gypsum; the pozzolan may also be admixed with fly ash to provide a pozzolan blend for use with Portland cement with reduced Portland cement content and use of Class C fly ash; the pozzolan is derived by reaction of coal flue gases with an atomized vapor of slaked lime.

REFERENCES:
patent: 4268316 (1981-05-01), Wills, Jr.
patent: 4495162 (1985-01-01), Jons et al.
patent: 4501618 (1985-02-01), Gebhard et al.
patent: 4731120 (1988-03-01), Tuutti

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