par Van Bemst, André 
Référence Bulletin des Sociétés chimiques belges, 64, 7-8, page (333-351)
Publication Publié, 1955
Référence Bulletin des Sociétés chimiques belges, 64, 7-8, page (333-351)
Publication Publié, 1955
Article révisé par les pairs
| Résumé : | Recent experimental results relative to the system CaO‐SiO2‐H2O at ordinary temperature have been applied to the study of the reactions occuring during the hydration of tricalcium and dicalcium silicate. The first part of this work deals with the study of the pure calcium silicate hydrates I and II, i.e. 0,8‐1,5 CaO.SiO2.aq and 1,7‐2,0 CaO.SiO2.aq. They were synthetized by two different new ways and studied by chemical, differential thermal and thermogravimetric analyses, X ray diffraction, electron microscopy and infrared spectrometry. The second part of the work describes the results, based on the same experimental methods, of the study of the reaction between Ca3SiO5, ß and γ Ca2SiO4 and various amounts of pure water or lime‐water, at temperatures between 4° and 60°C, after different periods of hydration. The method of determining the composition of the ternary CaO‐SiO2‐H2O phase in samples of partially hydrated silicate is indicated. The rate of hydrolysis of Ca3SiO5 increases with decreasing amount of water used for its hydration. The hydraulic properties of tricalcium silicate are enhanced in the conditions of hydrating cement; calcium silicate hydrate II and Ca(OH)2 are formed. The mechanism of formation of calcium silicate hydrates I and II from Ca3SiO5 is different. Hydrate I is the only one which forms through the liquid phase. Copyright © 1955 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim |
