Effect of admixtures on the electrical behaviour of Portland cement

The aim of the present work was to show the effect of calcium formiate, calcium lignosulfonate, glucose, gluconic acid and some coumarin derivatives on the hydration of Portland cement in aqueous medium (water/cement ratio 0.3) using the electrical conductivity technique. Two conductivity peaks were...

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Bibliographic Details
Published in:Journal of materials science letters 1993, Vol.12 (1), p.40-42
Main Authors: ABD EL WAHED, M. G, HELMY, I. M, EL DIDAMONY, H, EBIED, E
Format: Article
Language:English
Subjects:
Applied sciences
Buildings. Public works
Cement concrete constituents
Cements
Exact sciences and technology
Hydration
Materials
Properties of anhydrous and hydrated cement, test methods
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Summary:The aim of the present work was to show the effect of calcium formiate, calcium lignosulfonate, glucose, gluconic acid and some coumarin derivatives on the hydration of Portland cement in aqueous medium (water/cement ratio 0.3) using the electrical conductivity technique. Two conductivity peaks were obtained during the initial hardening of cement pastes. The first maximum was due to the hydrolysis of cement. The second maximum is a result of an increasing number of ions due to ettringite-monosulfate transformation.
ISSN:0261-8028
1573-4811
DOI:10.1007/BF00275466