Determination of Calcium Ions in Hydrated Cement Paste at Early Stage

Abstract:

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.

• Periodical: Materials Science Forum (Volumes 636-637)
• Pages: 1239-1243
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.636-637.1239
• Online since: January 2010
• Authors: Šárka Hošková, Petra Tichá, Pavel Demo
• Keywords: Cement Paste, Concentration of Free Ca²⁺ Ions, Early Stage of Hydration

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