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Influence of orthophosphate ions on the dissolution of tricalcium silicate

Bénard, P. / Garrault, S. / Nonat, A. / Cau-dit-Coumes, C.

AbstractTricalcium silicate dissolution in the presence of orthophosphate ions was monitored by measuring the concentrations of calcium and silicate ions in dilute suspensions using a special dissolution cell coupled to an optical emission spectrometer. Results show that increasing adsorption of orthophosphate ions slows down the dissolution of Ca3SiO5 and that a calcium-phosphate precipitate may form at certain orthophosphate concentrations. These observations are correlated with results of calorimetric experiments carried out during the hydration of silica-rich cement pastes in the presence of the same salts.

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Influence of orthophosphate ions on the dissolution of tricalcium silicate

Bénard, P. / Garrault, S. / Nonat, A. / Cau-dit-Coumes, C.

AbstractTricalcium silicate dissolution in the presence of orthophosphate ions was monitored by measuring the concentrations of calcium and silicate ions in dilute suspensions using a special dissolution cell coupled to an optical emission spectrometer. Results show that increasing adsorption of orthophosphate ions slows down the dissolution of Ca3SiO5 and that a calcium-phosphate precipitate may form at certain orthophosphate concentrations. These observations are correlated with results of calorimetric experiments carried out during the hydration of silica-rich cement pastes in the presence of the same salts.

Influence of orthophosphate ions on the dissolution of tricalcium silicate

Bénard, P. / Garrault, S. / Nonat, A. / Cau-dit-Coumes, C.

AbstractTricalcium silicate dissolution in the presence of orthophosphate ions was monitored by measuring the concentrations of calcium and silicate ions in dilute suspensions using a special dissolution cell coupled to an optical emission spectrometer. Results show that increasing adsorption of orthophosphate ions slows down the dissolution of Ca3SiO5 and that a calcium-phosphate precipitate may form at certain orthophosphate concentrations. These observations are correlated with results of calorimetric experiments carried out during the hydration of silica-rich cement pastes in the presence of the same salts.

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Title:

Influence of orthophosphate ions on the dissolution of tricalcium silicate

Contributors:

Bénard, P. (author) / Garrault, S. (author) / Nonat, A. (author) / Cau-dit-Coumes, C. (author)

Published in:

Cement and Concrete Research ; 38 ; 1137-1141

Publication date:

2008-03-26

Size:

5 pages

ISSN:

DOI:

https://doi.org/10.1016/j.cemconres.2008.03.019

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

Hydration , Ca<inf>3</inf>SiO<inf>5</inf> , Retardation , Adsorption

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