Process for producing blended cements with reduced carbon...

Details Process for producing blended cements with reduced carbon... Process for producing blended cements with reduced carbon...

2005-08-30

2005-08-30

Marcantoni, Paul (Department: 1755)

Compositions: coating or plastic

Coating or plastic compositions

Inorganic settable ingredient containing

C106S739000, C106S757000

Reexamination Certificate

active

06936098

ABSTRACT:
A process for producing blended cement in which the cement contains Portland Cement mixed thoroughly with a microfiller, and possibly a water reducing agent, to provide a dry cement mixture, and fine supplementary cementitious materials selected from the materials blast furnace slag, fly ash, quartz, silica, amorphous silicon dioxide, limestone, and recycled concrete. The supplementary materials are first subjected to a grinding step in a dry state to a specific surface of at least 1000 cm2/g (Blaine). In a second step the ground supplementary materials are subjected to a grinding step together with at least 20% by weight of the total grinding mass of a highly reactive cement mixture in a dry state, to achieve a specific surface of at least 3000 cm2/g (Blaine).

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patent: 2002/0000179 (2002-01-01), Mehta
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patent: 0 696 262 (1996-02-01), None
patent: WO 89/02878 (1989-04-01), None
patent: WO 94/25411 (1994-11-01), None

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