Determination of Calcium Ions in Hydrated Cement Paste at Early Stage

Determination of Calcium Ions in Hydrated Cement Paste at Early Stage

A novel method that allows determining instantaneous concentration of calcium ions, Ca2+, in hydrated cement paste (HCP) is suggested. EDTA solution (belonging to a group of carboxylic acids/carboxylates and borates) seems to be very effective retarder altering nucleation and subsequent growth of ne...

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Veröffentlicht in:Materials science forum 2010-01, Vol.636-637, p.1239-1243
Hauptverfasser: Tichá, Petra, Demo, Pavel, Hošková, Šárka
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description A novel method that allows determining instantaneous concentration of calcium ions, Ca2+, in hydrated cement paste (HCP) is suggested. EDTA solution (belonging to a group of carboxylic acids/carboxylates and borates) seems to be very effective retarder altering nucleation and subsequent growth of newly forming clusters of calcium minerals. Concentrations of Ca2+ have been determined for various water to cement ratios, at different times and for given temperature.
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