Upm-kymmene Corporation

Markku Leivo

Antti Laukkanen

Jan-Erik Teirfolk

Hannele Kuosa

Kirsi Kataja

Antti Nurmi

Anna Suurnakki

The invention relates to use of nano-fibrillar cellulose as an gas-entrainment stabilizer, which when used in cementitious materials, provides improved gas pore structure quality and/or stability and/or robustness with regard to water content variation. The invention further relates to a method for stabilizing gasentrainment of cementitious materials and to a method for providing cementitious material with improved air pore structure quality and/or stability and/or robustness with regard to water content variation.

Additive for cementitious materials

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.

Material to be used as a concrete additive

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Espoo, Finland

Markku Leivo