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Strätlingite: compatibility with sulfate and carbonate cement phases

Okoronkwo, M U

The silicate AFm, strätlingite, has been shown to be stable in high aluminosilicate cement systems but its stability with respect to the anion content of hydrated Portland cement paste is unknown. The stability of strätlingite in the presence of sulfate and carbonate phases relevant to cement systems are reported. Results show that strätlingite persists at the sulfate activity conditioned by gypsum, ettringite and at carbonate activity conditioned by the presence of calcite, carbonate AFm, or carbonate AFt. Structural incorporation of anions such as carbonate or sulfate in strätlingite was not observed in the temperature range 20–85 °C.

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Strätlingite: compatibility with sulfate and carbonate cement phases

Okoronkwo, M U

The silicate AFm, strätlingite, has been shown to be stable in high aluminosilicate cement systems but its stability with respect to the anion content of hydrated Portland cement paste is unknown. The stability of strätlingite in the presence of sulfate and carbonate phases relevant to cement systems are reported. Results show that strätlingite persists at the sulfate activity conditioned by gypsum, ettringite and at carbonate activity conditioned by the presence of calcite, carbonate AFm, or carbonate AFt. Structural incorporation of anions such as carbonate or sulfate in strätlingite was not observed in the temperature range 20–85 °C.

Strätlingite: compatibility with sulfate and carbonate cement phases

Okoronkwo, M U

The silicate AFm, strätlingite, has been shown to be stable in high aluminosilicate cement systems but its stability with respect to the anion content of hydrated Portland cement paste is unknown. The stability of strätlingite in the presence of sulfate and carbonate phases relevant to cement systems are reported. Results show that strätlingite persists at the sulfate activity conditioned by gypsum, ettringite and at carbonate activity conditioned by the presence of calcite, carbonate AFm, or carbonate AFt. Structural incorporation of anions such as carbonate or sulfate in strätlingite was not observed in the temperature range 20–85 °C.

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Title:

Strätlingite: compatibility with sulfate and carbonate cement phases

Contributors:

Okoronkwo, M U (author) / Glasser, F P

Published in:

Materials and structures ; 49

Publication date:

2016

ISSN:

DOI:

https://doi.org/10.1617/s11527-015-0740-1

Type of media:

Article (Journal)

Type of material:

Print

Language:

English

Keywords:

Operating Procedures, Materials Treatment , Carbonate , Compatibility , Theoretical and Applied Mechanics , Materials Science, general , Engineering , Strätlingite , Stability , Structural Mechanics , Building Materials , Civil Engineering , Sulfate

Classification:

BKL: 56.45 Baustoffkunde / 51.30 Werkstoffprüfung, Werkstoffuntersuchung
Local classification TIB: 275/6500 / 250/6500

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