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Влияние замораживания на прочность сцепления в бетонных швах при зимнем бетонировании

Authors: Rumyantsev, E.V.; Solovyev, V.G.; Baiburin, A.Kh.;

Влияние замораживания на прочность сцепления в бетонных швах при зимнем бетонировании

Abstract

Румянцев Евгений Владимирович, руководитель Управления R&D Департамента продукта, ООО «ПИК-Строительные Технологии» (Москва), jekarum@yandex.ru Соловьев Вадим Геннадьевич, кандидат технических наук, доцент кафедры «Технологии вяжущих веществ и бетонов», Московский государственный строительный университет (Москва), s_vadim_g@mail.ru Байбурин Альберт Халитович, доктор технических наук, профессор кафедры «Строительное производство и теория сооружений», Южно-Уральский государственный университет (Челябинск), abayburin@mail.ru. E.V. Rumyantsev1, jekarum@yandex.ru V.G. Solovyev2, s_vadim_g@mail.ru A.Kh. Baiburin3 ,abayburin@mail.ru 1The Head of R&D of the Product Department, LLC “PIK-Constructional Technologies”, Moscow, Russia 2National Research Moscow State University of Civil Engineering, Moscow, Russia 3South Ural State University, Chelyabinsk, Russia Объект исследования – бетонные швы и стыки крупнопанельных зданий. Целью исследования являлась оценка влияния раннего замораживания на прочность сцепления в бетонных швах и выявление эффективности различных технологических методов при зимнем бетонировании стыков сборных конструкций. Прочность сцепления определялась на образцах-призмах, изготовленных из тяжелого бетона и самоуплотняющихся мелкозернистых бетонных смесей. Получены зависимости влияния на прочность сцепления в бетонных швах и прочности бетона при сжатии в раннем возрасте после замораживания, оттаивания и последующего твердения в нормальных условиях. Установлено благоприятное влияние на прочность сцепления в швах предварительного прогрева стыков, а также динамика набора прочности сцепления в швах при «холодном» бетонировании. Результаты исследования позволяют существенно расширить область применения и повысить энергоэффективность беспрогревных методов зимнего бетонирования. The object of this study is concrete seams and joints in large–panel buildings. The research was carried out in order to assess the effect of early freezing on the adhesion strength of concrete joints and to identify the characteristics of active and passive methods of winter concreting of joints in prefabricated structures. Laboratory research methods were applied on prism samples made of self-sealing finegrained concrete mixtures. The dependences of the effect of freezing on the adhesion strength of concrete joints and the compressive strength of concrete at an early age as a result of freezing, thawing and subsequent hardening under normal conditions were obtained. A favorable effect on the strength of preheating joints was determined. An assessment of the shortage of the design strength of joints during "cold" concreting was performed. The results of the study make it possible to significantly expand the scope of application and increase the energy efficiency of non-heating methods of winter concreting.

Keywords

УДК 693.547.34, прочность сцепления бетонных швов «старого» и «нового» бетона, the adhesion strength of concrete joints “old” and “new” concrete, самоуплотняющиеся бетонные смеси, self-compacting fresh concrete, cold concrete, зимнее бетонирование, winter concreting, холодный бетон

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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