Influence of triethanolamine on the hydration characteristics of tricalcium silicate
- 1 November 1972
- journal article
- research article
- Published by Wiley in Journal of Chemical Technology & Biotechnology
- Vol. 22 (11) , 1125-1138
- https://doi.org/10.1002/jctb.5020221102
Abstract
The hydration characteristics of 3CaO.SiO2 or β2CaO.SiO2 are studied by an addition of 0.0, 0.1, 0.5 or 1.0% triethanolamine. The amount of Ca(OH)2 found at 1, 3, 7 or 28 days was in the order C3S + 0% TEA > C3S +0.1% TEA > C3S + 0.5% TEA > C3S+1.0% TEA, irrespective of whether lime was estimated by X‐ray, DTA, TGA or chemical analysis. The rate of hydration, in terms of the disappearance of 3CaO.SiO2, showed that hydration proceeded faster in the presence of TEA after 1 day. Additions of TEA increase the induction period, promote the formation of a C‐S‐H with higher CaO/SiO2 ratio, increase the formation of non‐crystalline Ca(OH)2 and enhance the surface area of the hydrated silicate product.Keywords
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