Material to be used as a concrete additive
AssigneeUpm-Kymmene Corporation
InventorsAntti Laukkanen, Jan-Erik Teirfolk, Markku Leivo, Hannele Kuosa, Kirsi Kataja, Antti Nurmi
Life of this patent
Estimating the term…
Abstract
The invention relates to an admixture for a cementitious composition comprising microfibrillar cellulose and/or a derivative thereof. The invention also relates to a method of manufacturing said admixture and to the use of the microfibrillar cellulose and/or a derivative thereof in the concrete admixture. The invention further relates to a cementitious composition comprising said admixture and methods of manufacture and use thereof.
Claims27
A cement admixture for use in a cementitious composition, wherein the admixture comprises:
- a cementitious binder;
- microfibrillar cellulose;
- and/or a derivative thereof;
- and/or labile chemically modified cellulose pulp or labile chemically modified cellulose raw material which forms microfibrillar cellulose during the use of the admixture;
- wherein the amount of the microfibrillar cellulose is between 0.002% and 0.2% by weight of the cementitious binder in the cementitious composition;
- and
- optionally water.
A cement admixture for use in a cementitious composition, wherein the admixture comprises:
- a cementitious binder;
- microfibrillar cellulose;
- and/or a derivative thereof;
- and/or labile chemically modified cellulose pulp or labile chemically modified cellulose raw material which forms microfibrillar cellulose during the use of the admixture,
- wherein a cationic and/or anionic substance is adsorbed on a surface of the microfibrillar cellulose, derivative thereof, and/or labile chemically modified cellulose pulp or cellulose raw material which forms microfibrillar cellulose during the use of the admixture;
- and
- wherein the amount of the microfibrillar cellulose is between 0.002% and 0.2% by weight of the cementitious binder in the cementitious composition;
- optionally water.
Dependencies are inferred from the claim text.