The present study addresses the effect of different concentrations of Na2O on the structure of a composition of fresh C-S-H gels. The gels were synthesized from laboratory reagents, using calcium nitrate as the source of calcium and a sodium silicate solution for the silicon. A 10-M solution of NaOH was used to maintain a pH of over 13 throughout. The synthesized gels were exposed to different amounts of 8-M NaOH to determine their chemical stability and subsequently characterized with Fourier transform IR spectroscopy. The results showed that the addition of different concentrations of sodium leads to C-S-H gel modification even in the very short term. © 2009 Elsevier Ltd. All rights reserved.
CITATION STYLE
García Lodeiro, I., Macphee, D. E., Palomo, A., & Fernández-Jiménez, A. (2009). Effect of alkalis on fresh C-S-H gels. FTIR analysis. Cement and Concrete Research, 39(3), 147–153. https://doi.org/10.1016/j.cemconres.2009.01.003
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