Patent ID: 7527689
Filing Date: 2009-05-05
Classification: C04B

Abstract:
1. A cement composition comprising a cement settable by hydration and subject to carbonation and a cement admixture which is a non-hydraulic material comprising the compound γ-2CaO·SiO 2 as a main component, the total content of γ-2CaO·SiO 2 in the non-hydraulic admixture material being 65% or more, the content of 12CaO·7Al 2 O 3 and/or 11CaO·7Al 2 O 3 ·CaF 2 being 25% or less, the total content of fluorine being 2% or less, and the content of the cement admixture being 5-50 parts in 100 parts of the total of the cement and the cement admixture.