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Hydration kinetics modeling of Portland cement considering the effects of curing temperature and applied pressure / Lin, Feng in Cement and concrete research, Vol. 39 N° 4 (Avril 2009) 

Public ISBD [article]  in Cement and concrete research > Vol. 39 N° 4 (Avril 2009) . - pp. 255–265 Titre : Hydration kinetics modeling of Portland cement considering the effects of curing temperature and applied pressure Type de document : texte imprimé Auteurs : Lin, Feng, Auteur ; Christian Meyer, Auteur Année de publication : 2009 Article en page(s) : pp. 255–265 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Hydration;  Kinetics;  Portland  cement;  Modeling;Thermodynamics Résumé : A hydration kinetics model for Portland cement is formulated based on thermodynamics of multiphase porous media. The mechanism of cement hydration is discussed based on literature review. The model is then developed considering the effects of chemical composition and fineness of cement, water–cement ratio, curing temperature and applied pressure. The ultimate degree of hydration of Portland cement is also analyzed and a corresponding formula is established. The model is calibrated against the experimental data for eight different Portland cements. Simple relations between the model parameters and cement composition are obtained and used to predict hydration kinetics. The model is used to reproduce experimental results on hydration kinetics, adiabatic temperature rise, and chemical shrinkage of different cement pastes. The comparisons between the model reproductions and the different experimental results demonstrate the applicability of the proposed model, especially for cement hydration at elevated temperature and high pressure. ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609000258 [article] Hydration kinetics modeling of Portland cement considering the effects of curing temperature and applied pressure [texte imprimé] / Lin, Feng, Auteur ; Christian Meyer, Auteur . - 2009 . - pp. 255–265. Génie Civil Langues : Anglais (eng) in Cement and concrete research > Vol. 39 N° 4 (Avril 2009) . - pp. 255–265 Mots-clés : Hydration;  Kinetics;  Portland  cement;  Modeling;Thermodynamics Résumé : A hydration kinetics model for Portland cement is formulated based on thermodynamics of multiphase porous media. The mechanism of cement hydration is discussed based on literature review. The model is then developed considering the effects of chemical composition and fineness of cement, water–cement ratio, curing temperature and applied pressure. The ultimate degree of hydration of Portland cement is also analyzed and a corresponding formula is established. The model is calibrated against the experimental data for eight different Portland cements. Simple relations between the model parameters and cement composition are obtained and used to predict hydration kinetics. The model is used to reproduce experimental results on hydration kinetics, adiabatic temperature rise, and chemical shrinkage of different cement pastes. The comparisons between the model reproductions and the different experimental results demonstrate the applicability of the proposed model, especially for cement hydration at elevated temperature and high pressure. ISSN : 0008-8846 En ligne : http://www.sciencedirect.com/science/article/pii/S0008884609000258