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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Influence of Pozzolanic Materials on the Hydration of Calcium Sulfoaluminate Cements
Author(s): Frank Winnefeld, Lukas H.J. Martin, Elsa Tschopp, Christian J. Müller and Barbara Lothenbach
Publication: Special Publication
Appears on pages(s): 15.1-15.12
Keywords: Calcium sulfoaluminate cement, alternative binders, supplementary cementitious materials, pozzolan, fly ash, silica fume, thermodynamic modelling
Abstract:Calcium sulfoaluminate (CSA) cements are receiving increasing interest because they promise to
provide a low–CO2 alternative to portland cement. In order to save costs and to further reduce the amount of
CO2 attributed to the production of CSA, they are often blended with supplementary cementitious materials
(SCMs) such as limestone powder or industrial by-products such as slag or fly ash.
In portland cement systems, pozzolanic SCMs react with portlandite to form C-S-H. In CSA cements this
reaction path is not possible as portlandite is generally not present in the hydrate assemblage. In this
contribution, thermodynamic modelling is used to assess how pozzolanic SCMs may contribute to the hydration
reactions and change the hydrate assemblage of CSA cements. The calculated hydrate compositions are
compared to experimental data proving that pozzolanic SCMs are able to contribute to the hydration reactions of
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