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The influence of alkali-free and alkaline shotcrete accelerators within cement systems - I. Characterization of the setting behavior

Paglia, C. / Wombacher, F. / Bohni, H.

The influence of alkali-free and alkaline accelerators on the setting behavior of cementitious mixtures is investigated. The aluminium sulfate present in the alkali-free accelerators promotes the crystallization of ettringite prisms (2-7 my m) between the clinkers, thus connecting them in a compact mass and accelerating the setting. The very rapid setting promoted by the addition of the alkali KAl(OH)₄-rich admixture is mainly the result of the precipitation of CH plates and amorphous KCASSH hydrates. In this case, the crystallization of elongated ettringite rods contributes to a smaller extent to the setting.

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The influence of alkali-free and alkaline shotcrete accelerators within cement systems - I. Characterization of the setting behavior

Paglia, C. / Wombacher, F. / Bohni, H.

The influence of alkali-free and alkaline accelerators on the setting behavior of cementitious mixtures is investigated. The aluminium sulfate present in the alkali-free accelerators promotes the crystallization of ettringite prisms (2-7 my m) between the clinkers, thus connecting them in a compact mass and accelerating the setting. The very rapid setting promoted by the addition of the alkali KAl(OH)₄-rich admixture is mainly the result of the precipitation of CH plates and amorphous KCASSH hydrates. In this case, the crystallization of elongated ettringite rods contributes to a smaller extent to the setting.

The influence of alkali-free and alkaline shotcrete accelerators within cement systems - I. Characterization of the setting behavior

Paglia, C. / Wombacher, F. / Bohni, H.

The influence of alkali-free and alkaline accelerators on the setting behavior of cementitious mixtures is investigated. The aluminium sulfate present in the alkali-free accelerators promotes the crystallization of ettringite prisms (2-7 my m) between the clinkers, thus connecting them in a compact mass and accelerating the setting. The very rapid setting promoted by the addition of the alkali KAl(OH)₄-rich admixture is mainly the result of the precipitation of CH plates and amorphous KCASSH hydrates. In this case, the crystallization of elongated ettringite rods contributes to a smaller extent to the setting.

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Titel:

The influence of alkali-free and alkaline shotcrete accelerators within cement systems - I. Characterization of the setting behavior

Beteiligte:

Paglia, C. (Autor:in) / Wombacher, F. (Autor:in) / Bohni, H. (Autor:in)

Erschienen in:

Cement and Concrete Research ; 31 ; 913-918

Erscheinungsdatum:

2001

Format / Umfang:

6 Seiten, 13 Quellen

ISSN:

DOI:

https://doi.org/10.1016/S0008-8846(01)00509-9

Medientyp:

Aufsatz (Zeitschrift)

Format:

Print

Sprache:

Englisch

Schlagwörter:

Alkalinität , Aluminiumhydroxid , chemische Fällung , amorpher Stoff , Hydrat , Kristallisation , Ettringit , Abbindebeschleuniger , Wasserabbinden von Zement , Additiv , alkalisches Medium , Kaliumhydroxid , Aluminiumsulfat , Spritzbeton

Ähnliche Titel

The influence of alkali-free and alkaline shotcrete accelerators within cement systems - I. Characterization of the setting behavior

Paglia, C. | Online Contents | 2001

The influence of alkali-free and alkaline shotcrete accelerators within cement systems

Paglia, C. / Wombacher, F. / Bohni, H. | British Library Online Contents | 2001

The influence of alkali-free and alkaline shotcrete accelerators within cement systems

Paglia, C. / Wombacher, F. / Bohni, H. | British Library Online Contents | 2003

Influence of Alkali-Free and Alkaline Shotcrete Accelerators within Cement Systems: Hydration, Microstructure, and Strength Development

Paglia, C. S. B. / Wombacher, F. J. / Bohni, H. K. | British Library Online Contents | 2004

Influence of Alkail-Free and Alkaline Shotcrete Accelerators within Cement Systems: Hydration, Microstructure, and Strength Development

Paglia, Christian S.B. | Online Contents | 2004