Development of complex admixture for winter concreting

Title: Development of complex admixture for winter concreting
Author(s): A. Usherov-Marshak, V. Sopov, A. Lihopud, N. Sinayko
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: 351 - 358
Total Pages: 8
Nb references: 8
Language: English

Abstract: Despite of absence of unified views about the frost attack mechanism, the explorers con¬verge in judgement, that one of the most dangerous causes is the crystallisation of pore solution. It is accompanying with increase of a volume and play role of an internal pres¬sure source. There are two principled methods of a decrease of danger of this effect. One is connected to a decrease of temperature of phase transition with the help of anti-frost admixtures. Other - with a decrease of quantity of refrigerated water by maintenance of concreting at early stages at positive temperatures. Necessity of the introducing of anti-frost admixtures in large concentrations - one of the most essential lacks of conventional methods. In the given contribution the mining of the complex admixture for winter concreting is esteemed, which one consists of three personal components. The chemical interplay of components at mixing in different mutual concentrations stipulates wobble of final effect of the component. The problem of compatibility of components is resolved by a semigraphical way on an original technique.

Online publication: 2010-06-28
Publication type : full_text
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