The physical and chemical characteristics of the shell of air-entrained bubbles in cement paste / M. Tyler Ley in Cement and concrete research, Vol. 39 N° 5 (Mai 2009)  

The physical and chemical characteristics of the shell of air-entrained bubbles in cement paste [texte imprimé] / M. Tyler Ley, Auteur ; Ryan T. Chancey, Auteur ; Maria C.G. Juenger, Auteur . - 2009 . - pp. 417–425.
Génie Civil
Langues : Anglais (eng)
in Cement and concrete research > Vol. 39 N° 5 (Mai 2009) . - pp. 417–425

Mots-clés :	Freezing and thawing  Admixture Fresh concrete Air entrainment
Résumé :	Recent research has suggested that the shell of an air-entrained void is important for resisting coalescence between air-voids and diffusion of gas from the surrounding fluid. The current paper describes the physical and chemical properties of an air-void shell during the first 2 h of hydration and chemical characteristics at 60 days. Results from this research suggest that the air-void shells found in air-entrained paste have varied physical properties and the crystalline material of these shells is largely made up of fine cement particles during the first 2 h of hydration. Observations of paste at 60 days of hydration suggest that the shell is made up of calcium silicate hydrate (C–S–H) with a morphology different from that in the bulk paste.
ISSN :	0008-8846
En ligne :	http://www.sciencedirect.com/science/article/pii/S0008884609000441