Chemical Composition of C‐S‐H Gel Formed in the Hydration of Calcium Silicate Pastes
- 1 March 1979
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 62 (3-4) , 117-120
- https://doi.org/10.1111/j.1151-2916.1979.tb19033.x
Abstract
The chemical and physical compositions of C‐S‐H formed in paste hydration of C3S cured at 4°, 25°, and 65°C and of C2S and a C3S/C2S blend cured at 25°C were studied using quantitative X‐ray diffraction analysis (QXDA), extraction, and thermal effluent gas analysis (TEGA) to determine the free CH content. The amount of CH determined by extraction is greater than or equal to that determined by QXDA. The difference between the two results increased with the H2O surface area of the paste, indicating the existence of adsorbed CH in the form of Ca2+ and (OH)− ions which cannot be measured by QXDA and suggesting that the extraction method is better for estimating the composition of C‐S‐H.Keywords
This publication has 7 references indexed in Scilit:
- C/S mole ratio of C-S-H gel in a mature C3S paste as determined by edxaCement and Concrete Research, 1976
- Crystal Chemistry of Hydrous Calcium Silicates: III, Morphology and Other Properties of Tobermorite and Related PhasesJournal of the American Ceramic Society, 1958
- Quantitative X-Ray Diffraction AnalysisAnalytical Chemistry, 1958
- The Stoichiometry of the Hydration of β-Dicalcium Silicate and Tricalcium Silicate at Room TemperatureJournal of the American Chemical Society, 1958
- The Stoichiometry of the Hydration of Tricalcium Silicate at Room Temperature. II. Hydration in Paste FormThe Journal of Physical Chemistry, 1956
- The Stoichiometry of the Hydration of Tricalcium Silicate at Room Temperature. I. Hydration in Paste FormThe Journal of Physical Chemistry, 1956
- Relationships Between Calcium Silicates and Clay MineralsClay Minerals, 1956