Nucleation of portlandite clusters in cement paste at very early stageof hydration

0366278 - FZÚ 2012 RIV CH eng J - Journal Article
Demo, Pavel - Sveshnikov, Alexey - Hošková, Š. - Tichá, P. - Kožíšek, Zdeněk
Nucleation of portlandite clusters in cement paste at very early stageof hydration.
Materials Science Forum. 636-637, Pt. 1-2 (2010), s. 1234-1238. ISSN 0255-5476.
[5th International Materials Symposium/14th Conference of the Sociedade-Portuguesa-de-Materiais. Lisbon, 05.04.2009-08.04.2009]
Institutional research plan: CEZ:AV0Z10100521
Keywords : hydrating cement paste * nucleation * critical size of cluster of portlandite
Subject RIV: BM - Solid Matter Physics ; Magnetism

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.
Permanent Link: http://hdl.handle.net/11104/0201328