Nano modifying additive micro silica influence on integral and differential characteristics of vibrocentrifuged concrete

Beskopylny, Alexey; Stel’makh, Sergey A.; Shcherban’, Evgenii M.; Mailyan, Levon R.; Meskhi, Besarion

doi:10.1016/j.jobe.2022.104235

Cited by 24 publications

(22 citation statements)

References 51 publications

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“…From the point of view of methodology, we have developed previously obtained theoretical concepts and applied dependencies arising from the influence of various prescription, technological, and other factors on the structure and properties of variotropic concretes. Earlier in this study, we established the fundamental possibilities and substantiated the recipe-technological feasibility of obtaining an improved variotropic structure due to the additional technological impact of adding a vibration component to centrifugal forces [44][45][46][47][48].…”

Section: Discussionmentioning

confidence: 72%

“…For further analysis and comparison of the results obtained with the data obtained earlier in [44][45][46][47][48], three blocks can be conditionally distinguished: methodology, a structural component, and a resulting component. From the point of view of methodology, we have developed previously obtained theoretical concepts and applied dependencies arising from the influence of various prescription, technological, and other factors on the structure and properties of variotropic concretes.…”

Section: Discussionmentioning

confidence: 99%

“…As is known from [43][44][45][46][47][48], vibrocentrifugation makes it possible to achieve an improved variotropic structure by obtaining an additional vibrational effect, influencing the rheological characteristics of the non-Newtonian fluid of the concrete mixture, which is in a rigid state due to the small amount of mixing water. This factor is a feature, and a distinctive feature, of the centrifugation mode, as well as vibrocentrifugation.…”

Section: Discussionmentioning

confidence: 99%

“…One of the most effective types of building structure is the hollow structures with an annular section, primarily obtained via centrifugal compaction methods [43]. This method, in turn, as is known from our previous works and the works of other authors, can be improved by transforming it using the vibrocentrifugation method [43][44][45][46][47][48]. This aims to achieve the so-called variotropic structure in such concrete and in such structures.…”

Section: Rationalementioning

confidence: 99%

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Nano-Modified Vibrocentrifuged Concrete with Granulated Blast Slag: The Relationship between Mechanical Properties and Micro-Structural Analysis

et al. 2022

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Currently, in civil engineering, the relevant direction is to minimize the cost of the manufacture of the hollow structures of annular sections, as well as their construction and installation efficiency. To optimize the costs associated with building products and structures, it is proposed to apply the technology of vibrocentrifugation, to reconsider and comprehensively approach the raw materials for the manufacture of such products and structures. The purpose of this study is a theoretical substantiation and experimental verification with analytical numerical confirmation of the possibility of creating improved variotropic structures of vibrocentrifuged concrete nano-modified with ground granulated blast-furnace slag. The study used the methods of electron microscopy, laser granulometry, and X-ray diffraction. Slag activation was carried out in a planetary ball mill; samples were prepared on a special installation developed by the authors—a vibrocentrifuge. The optimal and effective prescription–technological factors were experimentally derived and confirmed at the microlevel using structural analysis. The mathematical dependencies among the composition, macrostructure, microstructure, and final properties of vibrocentrifuged concrete nano-modified by slag are determined. Empirical relationships were identified to express the variation of some mechanical parameters and identify the relationship between them and the composition of the mixture. The optimal dosage of slag was determined, which is 40%. Increases in strength indicators ranged from 16% to 27, density—3%.

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Section: Discussionmentioning

confidence: 72%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Rationalementioning

confidence: 99%

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Nano-Modified Vibrocentrifuged Concrete with Granulated Blast Slag: The Relationship between Mechanical Properties and Micro-Structural Analysis

et al. 2022

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“…Microsilica grade MK-85 was used as a nano-modifying additive. The chemical composition, granulometric characteristics, and X-ray diffraction analysis of microsilica are presented in [ 55 , 56 , 57 ].…”

Section: Methodsmentioning

confidence: 99%

A Study on the Cement Gel Formation Process during the Creation of Nanomodified High-Performance Concrete Based on Nanosilica

Beskopylny

Stel’makh

Shcherban’

et al. 2022

Gels

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One of the most science-intensive and developing areas is nano-modified concrete. Its characteristics of high-strength, high density, and improved structure, which is not only important at the stage of monitoring their performance, but also at the manufacturing stage, characterize high-performance concrete. The aim of this study is to obtain new theoretical knowledge and experimental-applied dependencies arising from the “composition–microstructure–properties” ratio of high-strength concretes with a nano-modifying additive of the most effective type. The methods of laser granulometry and electron microscopy are applied. The existing concepts from the point of view of theory and practice about the processes of cement gel formation during the creation of nano-modified high-strength concretes with nano-modifying additives are developed. The most rational mode of the nano-modification of high-strength concretes is substantiated as follows: microsilica ground to nanosilica within 12 h. A complex nano-modifier containing nanosilica, superplasticizer, hyperplasticizer, and sodium sulfate was developed. The most effective combination of the four considered factors are: the content of nanosilica is 4% by weight of cement; the content of the superplasticizer additive is 1.4% by weight of cement; the content of the hyperplasticizer additive is 3% by weight of cement; and the water–cement ratio—0.33. The maximum difference of the strength characteristics in comparison with other combinations ranged from 45% to 57%.

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Cements Based on Secondary Resources of the Metallurgical Industry as a Driver of Green Logistics in Supply of Building Materials

Kazanskaya

Al-Atasi

2023

Lecture Notes in Networks and Systems

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Nano modifying additive micro silica influence on integral and differential characteristics of vibrocentrifuged concrete

Cited by 24 publications

References 51 publications

Nano-Modified Vibrocentrifuged Concrete with Granulated Blast Slag: The Relationship between Mechanical Properties and Micro-Structural Analysis

Nano-Modified Vibrocentrifuged Concrete with Granulated Blast Slag: The Relationship between Mechanical Properties and Micro-Structural Analysis

A Study on the Cement Gel Formation Process during the Creation of Nanomodified High-Performance Concrete Based on Nanosilica

Cements Based on Secondary Resources of the Metallurgical Industry as a Driver of Green Logistics in Supply of Building Materials

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