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

0366278 - FZÚ 2012 RIV CH eng J - Článek v odborném periodiku
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]
Výzkumný záměr: CEZ:AV0Z10100521
Klíčová slova: hydrating cement paste * nucleation * critical size of cluster of portlandite
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus

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.
Trvalý link: http://hdl.handle.net/11104/0201328