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Regularities of ice formation and estimation of frost attack danger



Title: Regularities of ice formation and estimation of frost attack danger
Author(s): A. Usherov-Marshak, O. Zlatkovski, V. Sopov
Paper category : conference
Book title: International RILEM Workshop on Frost Resistance of Concrete
Editor(s): M. J. Setzer, R. Auberg and H. - J. Keck
Print-ISBN: 2-912143-30-6
e-ISBN: 2351580370
Publisher: RILEM Publications SARL
Publication year: 2002
Pages: 213 - 221
Total Pages: 9
Nb references: 17
Language: English


Abstract: The danger of frost attack at early stages of concrete hardening is developmental of thermal stresses, crystallizing, hydraulic (Powers, Setzer, Kamada) and osmotic (Vla-sov) pressures. We esteem the kind of predominant pressure in close connection with phylum of frame of a cement stone and parameters of ice formation at its freezing. On the basis of generalization of original experimental data, three types of ice formation regularities at freezing of cement rock are divided. They correspond to low, mean and high danger of frost attack. They differ by values of temperature of phase transitions of a pore liquid and behavior of increase of ice weight at a temperature decrease. Each phylum of regularities of ice formation is characteristic for definite pore frame and is watched at freezing of cement rock at definite stage of concreting. At a phenomenologi¬cal level the conformity between phylum of ice formation regularities, distribution of pores on the sizes and kind of the predominant mechanism of frost attack is presented.


Online publication: 2010-06-28
Publication type : full_text
Public price (Euros): 0.00