Abstract:
The present invention is in the field of admixtures to be used e.g. in concrete or mortar in order to improve characteristics of a final product, a method to obtain such an admixture, a product, typically being a solid product, such as concrete, mortar, glass, and cement, comprising said admixture and use of said admixture. The admixture comprises: a silica alumina compound, such as metakaolin or by-products of thermal conversion of paper waste and residue from the paper production, a calcium compound such as calcium carbonate, calcium hydroxide and a modifier, such as a surfactant, an emulsifier or a dispersant.