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https://doaj.org/article/05297...
Article . 2020
Data sources: DOAJ
https://dx.doi.org/10.18720/mc...
Other literature type . 2020
Data sources: Datacite
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Destruction of powder-activated concrete with fixation of destruction by a laser interferometer

Разрушение порошково-активированных бетонов с фиксацией разрушений лазерным интерферометром
Authors: Travush, Vladimir; Karpenko, Nikolaj; Erofeev, Vladimir; Vatin, Nikolai; Erofeeva, Irina; Maksimova, Irina; Kondrashchenko, Valerij; +1 Authors

Destruction of powder-activated concrete with fixation of destruction by a laser interferometer

Abstract

The article is devoted to the identification of the patterns of deformation and destruction of powder-activated concrete under the action of power loads. As research concrete, powder-activated concrete of a new generation was considered in comparison with materials of the old and transitional generations. To carry out such studies, laser holographic interferometry methods were used, the physical essence of which consists in recording wave fields synchronously with the application of the load reflected by the surface under study at various points in time and then comparing these wave fields with each other. Using the complete equilibrium deformation diagrams and 3D graphs, we determined the parameters of the diagram (cyclicity, ultimate tensile strength), and the parameters of surface deformation (photographs with waves of strains and cracks). Using laser interferometry methods, it was found that the introduction of microquartz, especially in combination with amorphous active silica fume, significantly delays the onset of microcrack formation in cement samples, which exhibit a uniform deformation field up to a stress level of 0.90–0.95 from destructive. A sample based on a cement-sand mortar without finely dispersed fillers distinguishes a lower level of crack formation, corresponding to a stress level of 0.5–0.6 from destructive ones, and with an increase in load, the fracture of the sample has a block character.

Статья посвящена выявлению закономерностей деформирования и разрушения порошково-активированных бетонов под действием силовых нагрузок. В качестве бетонов исследования рассматривались порошково-активированные бетоны нового поколения в сравнении с материалами старого и переходного поколений. Для проведения подобных исследований использовали методы лазерной голографической интерферометрии, физическая сущность которой состоит в регистрации волновых полей синхронно с приложением нагрузки, отраженных исследуемой поверхностью в различные моменты времени, и последующим сравнением этих волновых полей между собой. По полученным полным равновесных диаграммам деформирования и 3Д–графикам определяли параметры диаграммы (цикличность, предельная растяжимость), параметры деформации поверхности (фотографии с волнами деформаций и трещины). Методами лазерной интерферометрии установлено, что введение микрокварца, особенно в сочетании с аморфно-активным микрокремнеземом, существенно отдаляет момент начала микротрещинообразования в цементных образцах, которые проявляют однородное поле деформаций вплоть до уровня напряжений, составляющих 0,90–0,95 от разрушающих. Образец на основе цементно-песчаного раствора без тонкодисперсных наполнителей отличает более низкий уровень трещинообразования, соответствующий уровню напряжений 0,5–0,6 от разрушающих, при этом с ростом нагрузки разрушение образца имеет блочный характер.

Country
Russian Federation
Keywords

Building construction, Fracture testing, Crack propagation, self-compacting concrete, Самоуплотняющийся бетон, laser interferometry, self compacting concrete, crack propagation, Engineering (General). Civil engineering (General), распространение трещин, 620, fracture testing, sress-strain curves, лазерная интерферометрия, испытание на разрушение, Self-compacting concrete, Laser interferometry, TA1-2040, Sress-strain curves, кривые напряжение-деформация, TH1-9745

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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!
1
Average
Average
Average