Pozzolan blends

Details Pozzolan blends Pozzolan blends

C - Chemistry, Metallurgy

04

B

261/59

C04B 14/04 (2006.01) C04B 18/08 (2006.01)

Patent

CA 2024395

ABSTRACT An unground, fine pozzolan having a sulphur content determined as wt.% SO3 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.

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