6533b7ddfe1ef96bd1275556

RESEARCH PRODUCT

Influence of orthophosphate ions on the dissolution of tricalcium silicate

Céline Cau-dit-coumesAndré NonatP. BénardSandrine Garrault

subject

Materials scienceInorganic chemistryCa3SiO50211 other engineering and technologiesHydrationMineralogychemistry.chemical_element02 engineering and technologyCalorimetryCalciumIonlaw.inventionchemistry.chemical_compoundAdsorptionlaw021105 building & constructionGeneral Materials ScienceDissolutionCementRetardationBuilding and Construction021001 nanoscience & nanotechnologySilicatePortland cementchemistryAdsorption0210 nano-technology

description

International audience; Tricalcium 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.

yearjournalcountryeditionlanguage
2008-10-01Cement and Concrete Research
https://doi.org/10.1016/j.cemconres.2008.03.019