Перегляд за Автор "Shtefan, O."

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ESEARCH OF THE PROPERTIES OF THE SELF-COMPACTED CONCRETE OVER TIME
(Харьковский национальный автомобильно-дорожный университет, 2017) Bugayevskiy, S.; Voronova, Ye.; Shtefan, O.; Zadorozhny, A.; Kovrevsky, A.; Bugayevskiy, M.; Бугаєвський, С. О.; Воронова, Е. М.; Штефан, О. М.; Задорожний, А. О.; Ковревський, А. П.; Бугаєвський, М. С.; Бугаевский, С. А.; Воронова, Е. М.; Штефан, О. Н.; Задорожный, А. О.; Ковревский, А. П.; Бугаевский, М. С.
Concrete mixture is examined as a complex multicomponent system that becomes a single unit and can be studied as a physical unity with certain rheological, physical and mechanical properties. Studying the change of properties of self-compacted concrete over time, as well as the effect of two-phasic introduction of super-plasticizer on properties of concrete mixture are presented in this article.
USE OF SELF-COMPACTING CONCRETE DURING RECONSTRUCTION OF THE BUILDING FOR THE ADMINISTRATION SERVICE CENTRE
(Харьковский национальный автомобильно-дорожный университет, 2016) Bugayevskyi, S.; Voronova, Ye.; Shtefan, O.; Бугаевский, С. А.; Воронова, Е. М.; Штефан, О. Н.; Бугаєвський, С. О.; Воронова, Е. М.; Штефан, О. М.
Twophase introduction of superplasticizer additive influence on the properties of concrete mixture was researched. The obtained results allowed concreting of strengthening for the columns building. Herewith, 40 % of SP additive together with 12 % of mixing water were introduced directly into the concrete mixer truck at the moment of its arrival to the construction site, with subsequent agitation of concrete mixture.