Nucleation of Portlandite Clusters in Cement Paste at Very Early Stage of Hydration

Abstract:

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A very early stage of cement paste hydration is studied at microscopic level of description. Within context of nucleation theory the critical (and, thus, growable) size of clusters of calcium hydroxide (so-called portlandite) is estimated for chosen water to cement ratios at given temperature. Furthermore, also the barrier of portlandite nulceation is determined. It is shown that these static characteristics of process are practically unchanged contrary to number density of portlandite critical clusters formed in unit volume of mixture per unit time.

Info:

Periodical:

Materials Science Forum (Volumes 636-637)

Edited by:

Luís Guerra ROSA and Fernanda MARGARIDO

Pages:

1234-1238

DOI:

10.4028/www.scientific.net/MSF.636-637.1234

Citation:

P. Demo et al., "Nucleation of Portlandite Clusters in Cement Paste at Very Early Stage of Hydration", Materials Science Forum, Vols. 636-637, pp. 1234-1238, 2010

Online since:

January 2010

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$35.00

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