Material for cement, and cement

Abstract

Disclosed is a cement material comprising a powder of a calcium salt having inositol phosphate and/or a salt thereof adsorbed on its surface, wherein the powder has a specific surface area of 60 to 120 m2/g. Also disclosed is a process for producing a cement material, comprising the steps of: mixing a solution containing a calcium ion and adjusted to an alkaline pH value with a solution containing a phosphate ion to produce a precipitate; aging the system containing the precipitate to produce a powder of the calcium salt: collecting and drying the powder of the calcium salt; and immersing the dried powder of the calcium salt in a solution of inositol phosphate and/or a salt thereof to cause the adsorption of the inositol phosphate and/or the salt thereof onto the surface of the powder of the calcium salt.

Dependencies are inferred from the claim text.