Printed by Jouve, 75001 PARIS (FR) (19) EP 2 253 600 A1 & (11) EP 2 253 600 A1 (12) EUROPEAN PATENT APPLICATION (43) Date of publication: 24.11.2010 Bulletin 2010/47 (21) Application number: 09160271.4 (22) Date of filing: 14.05.2009 (51) Int Cl.: C04B 7/02 (2006.01) C04B 28/00 (2006.01) (84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA RS (71) Applicant: AALBORG PORTLAND A/S 9220 Aalborg Ost (DK) (72) Inventors: • Herfort, Duncan DK-9520, Skørping (DK) • Damtoft, Jesper Sand DK-9000, Aalborg (DK) (74) Representative: Kitchen, Steven Richard Chas. Hude A/S H.C. Andersens Boulevard 33 1780 Copenhagen V (DK) (54) Portland limestone calcined clay cement (57) The present invention relates to a cement com- prising Portland cement clinker and a clinker replacement material, wherein the clinker replacement material com- prises a carbonate material and a clay material, the clay material being characterised in that the carbonate ma- terial and/or the clay material has been treated in such a way that no chemical reaction occurs between the clay minerals and the carbonate material.
Portland limestone calcined clay cement
May 20, 2023
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