EP 4 067 321 A1

Cement comprising cement clinker and a pozzolanic-type supplementary cementitious material

(22) 30.03.2022

(43) 05.10.2022

(57) The present invention relates to a cement comprising cement clinker and a supplementary cementitious material, wherein said supplementary cementitious material comprises:

at least one calcined clay;

at least one natural pozzolan with a car­bo­­nate species content, expressed as CaCO3, of not less than 3% by weight of the total weight of said natural pozzolan.

The present invention also relates to cementitious conglomerates, such as mortar or concrete, comprising said cement.

Lastly, the present invention relates to the use of said supplementary cementitious material for reducing CO2 emissions during the production of a cement comprising cement clinker.

(71) Buzzi Unicem S.p.A., 15033 Casale Monferrato (AL) (IT)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES Fl FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR; Designated Extension States: BA ME; Designated Validation States: KH MA MD TN

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