Formation of the Spatial Environment in View of Colouristics

Suleymanova, Lyudmila; Malyukova, Marina; Pogorelova, Inna; Koryakina, Alina

doi:10.12737/22028

Cited by 3 publications

(4 citation statements)

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“…In the absence of external factors accelerating the corrosion of concrete, under thermal exposure during the operation of concrete structures of used nuclear fuel storage facilities, a self-healing effect of concrete may be observed as a result of more intense formation of calcium carbonate. However, it is worth considering the fact that the presence of steel reinforcement used in most structures of such buildings will have a negative effect on strength and durability as a result of corrosion of the passivation layer [5,[7][8][9][10][11][12][13][16][17][18][28][29][30][31][32]. In this regard, each type of concrete, depending on its mineral and chemical composition, as well as the presence or absence of reinforcement, must be researched in more detail to further predict its performance properties and durability.…”

Section: Discussionmentioning

confidence: 99%

“…At the same time, concrete is quite rarely exposed to chemical reagents in solid form, so concrete degradation processes due to chemical influences usually occur when critical concentrations of chemicals in liquid solutions interacting with concrete are exceeded. In this case, the degree of impact depends on the activity of the substance, the ambient temperature, the type of cement used, the watercement ratio of the concrete mixture, the degree of compaction of the concrete mixture and the permeability of concrete and other factors [4,[15][16][17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

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Concrete Carbonation of Deep Burial Storage Constructions under Model Aging Conditions

Medvedev,

Pustovgar,

Adamtsevich

et al. 2023

Buildings

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To ensure the safe operation of concrete structures of deep-burial storages, it is necessary to research the degradation mechanisms of such structures. Concrete carbonation is one of the key factors determining the service life of concrete structures. Existing methods for the concrete carbonation process research at various stages of the building structure life cycle make it possible to conduct model tests in the shortest possible time by simulating the operational factors influencing the corrosion process development. The authors carried out model tests of concrete of deep-burial storages using the method of accelerated concrete carbonation and by taking into account the effects of elevated temperatures. When exposed to elevated temperatures during carbonation, concrete samples exhibit a decrease in compressive strength in the first 56 days of testing by an average of 1.6 MPa. However, by the end of the tests (168 days), the strength of concrete samples at elevated temperatures is on average 4 MPa higher. The microstructure and carbonation dynamics were studied by XRD, TGA and SEM. The data obtained in the research can be used to develop models for predicting the service life of concrete structures of deep-burial storages.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Concrete Carbonation of Deep Burial Storage Constructions under Model Aging Conditions

Medvedev,

Pustovgar,

Adamtsevich

et al. 2023

Buildings

View full text Add to dashboard Cite

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“…Современное строительство и проектирование зданий и сооружений предъявляют высокие требования к прочности и долговечности строительных конструкций [1]. Одним из важных аспектов в данном контексте является разработка и оптимизация составных элементов, таких как перемычки, которые используются для поддержания оконных и дверных пролетов в зданиях и сооружениях.Использование газобетона как строительного материала имеет ряд преимуществ, включая легкость, теплоизоляционные свойства, обеспечиваемые однородной пористой структурой [2,3]. Однако, для обеспечения необходимой прочности и устойчивости при изгибе, газобетонные перемычки требуют армирования.…”

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“…Использование газобетона как строительного материала имеет ряд преимуществ, включая легкость, теплоизоляционные свойства, обеспечиваемые однородной пористой структурой [2,3]. Однако, для обеспечения необходимой прочности и устойчивости при изгибе, газобетонные перемычки требуют армирования.…”

unclassified

Research of Stress-Strain State of Jumpers of Aerated Concrete Composites

Suleymanova,

Obaydi,

Amelin

et al. 2023

Bulletin of Belgorod State Technological University Named After. V. G. Shukhov

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In this paper, the authors study the stress-strain state of composite jumpers made of aerated concrete blocks with steel reinforcement rods and external composite reinforcement when working in bending. Rod reinforcement of jumpers is carried out by inserting steel reinforcing bars into the body of aerated concrete in the longitudinal and transverse directions. Composite reinforcement is performed with carbon fiber tapes in the stretched edge of the element over the entire width, as well as parts of tapes on the flange sides of the aerated concrete block at the vertical seam or in the center of the element. The test results are assessed by comparing the strength of the normal section and the deformability of aerated concrete bending jumpers, the effectiveness of gluing carbon fiber tapes and aerated concrete, and the optimal use of various types of reinforcement. It has been established that external composite reinforcement at a load of up to 60% of the breaking load reduces the deformability of aerated concrete bending elements due to an increase in flexural rigidity, and at a load of more than 60% due to a change in the design scheme. Jumpers with rod reinforcement have a brittle nature of destruction, while those with external composite reinforcement fail plastically. In general, the load-bearing capacity of composite aerated concrete jumpers reinforced with external composite reinforcement is sufficient to withstand operational loads

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The Effect of the Color and Charge Source of the Luminescent Pigment on the Properties of Luminous Concretes

Kravchenko,

Suleymanova,

Lukuttsova

2024

Bulletin of Belgorod State Technological University Named After. V. G. Shukhov

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When designing luminescent concrete, an important factor is the functionality of the material, ensuring initial brightness and a long afterglow time. The color of the luminescent pigment affects the performance properties of the material. The research was made to study the effect of pigment color and reflective powder content in luminescent concrete on performance properties when charged with different light sources. In this study, authors used white Portland cement CimSA CEM I 52.5 R with a light reflectivity of 80%; reflective powder with a particle size of 75 μm; luminescent pigment SrAl2O4: Eu2+, Dy3+ of various colors: sky-blue, blue-green, yellow-green with a particle size of 25-55 μm. The intensity of the afterglow of the luminescent pigment in concrete is affected by two factors: the power of the luminous flux and the color temperature. To study the phase of intense afterglow and its duration, researchers used a charging method with different light sources. The influence of external factors on the afterglow brightness of a luminescent pigment for a specific chemical composition and pigment layer thickness is determined by the charging time, the luminescence intensity of the radiation source, and the spectrum structure of the radiation source. After adding reflective powder, the number of light transmission channels increases, so the luminescent effect of the material improves. The analysis showed that the order of intensity of the emission spectrum of luminescent pigments at the same excitation time is: yellow-green > blue-green > sky-blue.

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Formation of the Spatial Environment in View of Colouristics

Cited by 3 publications

References 0 publications

Concrete Carbonation of Deep Burial Storage Constructions under Model Aging Conditions

Concrete Carbonation of Deep Burial Storage Constructions under Model Aging Conditions

Research of Stress-Strain State of Jumpers of Aerated Concrete Composites

The Effect of the Color and Charge Source of the Luminescent Pigment on the Properties of Luminous Concretes

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