Development of alkali-activated binders based on technogenic fibrous materials

Klyuev, A.V.; Кашапов, Н. Ф.; Klyuev, Sergey; Lesovik, R. V.; Ageeva, Marina; Фомина, Е. В.

doi:10.58224/2618-7183-2023-6-1-60-73

Cited by 13 publications

(8 citation statements)

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“…As can be seen from the diagram of concrete and reinforcement deformations (Figure 1), the deformations of the longitudinal reinforcement S furthest from the longitudinal force εs are determined by [1][2][3]…”

Section: Resultsmentioning

confidence: 99%

“…To determine the height of the concrete of the compressed zone, we can apply the empirical dependence of the norms [2,4]:…”

Section: mentioning

confidence: 99%

“…It is known that the location of the longitudinal reinforcement in the section of the element can be symmetrical (Аs=Аs) relative to the center of gravity of the section and asymmetrical (Аs≠Аs). At the same time, symmetrical reinforcement is preferable to asymmetric reinforcement [1][2][3].…”

Section: mentioning

confidence: 99%

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The concept of calculating the strength of reinforced concrete compressed elements with small eccentricities

Aimenov,

Sabitov

et al. 2024

Third International Scientific and Practical Symposium on Materials Science and Technology (MST-III 2023)

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Reinforced concrete compressed elements with a small eccentricity and methods for calculating their strength are considered. A method for determining the deformation of the longitudinal reinforcement furthest from the longitudinal force is proposed. At the same time, the use of a single formula for s is ensured during the transition from an alternating deformation plot to an unambiguous one. Empirical dependence is used to determine the height of the compressed zone, which avoids solving the quadratic equation. In elements with a small eccentricity, symmetrical reinforcement is used, for this case the equation of equilibrium of longitudinal forces is derived.

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Section: Resultsmentioning

confidence: 99%

“…To determine the height of the concrete of the compressed zone, we can apply the empirical dependence of the norms [2,4]:…”

Section: mentioning

confidence: 99%

See 1 more Smart Citation

The concept of calculating the strength of reinforced concrete compressed elements with small eccentricities

Aimenov,

Sabitov

et al. 2024

Third International Scientific and Practical Symposium on Materials Science and Technology (MST-III 2023)

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“…The effect of polyreinforcement using polymer fiber and the introduction of microsilica additive has a complex effect on the entire structure of the vibrocentrifuged composite at the macro and micro levels. This makes it possible to obtain variatropic concrete with improved compressive strength, flexural strength, and reduced water absorption [ 52 , 88 , 89 ].…”

Section: Resultsmentioning

confidence: 99%

Influence of Polymer Fibers on the Structure and Properties of Modified Variatropic Vibrocentrifuged Concrete

Shcherban’,

Stel’makh,

Mailyan

et al. 2024

Polymers

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The application of polymer materials in concrete structures is widespread and effectively used. However, there is a lack of a systematic knowledge base about the structure formation and properties of variatropic vibrocentrifuged modified fiber-reinforced concrete. The purpose of this work is the investigation of the influence of polypropylene (PF) and basalt fiber (BF) and modification with microsilica (MS) on the properties of variatropic concretes obtained using the synthesized vibration centrifugation technology. Test samples were made using vibration centrifugation technology, followed by sawing. Various types of fiber reinforcement were studied, both individually and in combination. To determine the degree of effectiveness of each recipe solution, the following main characteristics were monitored: the density and workability of concrete mixtures; the density of hardened composites; compressive strength (CS); bending strength (BS); water absorption (WA). In variatropic vibrocentrifuged concrete, the greatest efficiency is achieved with dispersed BF reinforcement in an amount of 1.5%. Compared to the control composition, the increase in CS was 8.50%, the increase in BS was 79.17%, and WA decreased by 27.54%. With PF reinforcement, the greatest effect was recorded at a dosage of 1.0%. The increase in CS was 3.16%, the increase in BS was 10.42%, and WA decreased by 17.39%. The MS modification showed the best effect with 8% replacement of part of the Portland cement. The increase in CS was 17.43%, the increase in BS was 14.58%, and WA decreased by 33.30%. The most effective and economically rational formulation solution for vibrocentrifuged concrete is combined fiber reinforcement in combination with the MS modification in the following quantities: BF—1.0%; PF—0.5%; MS—8%. The increase in CS was 22.82%, the increase in BS was 85.42%, and WA decreased by 37.68%.

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“…In terms of the closest analogues of geopolymer concrete, namely cement concrete, the technology of fiber reinforcement is being widely developed and improved. Dispersed fiber, called fiber, produced from various materials, be it steel, basalt, polypropylene or other materials, is a very promising modifying additive that can significantly improve the mechanics and physics of the properties of cement concrete [31][32][33][34][35]. Geopolymer concrete, as a construction conglomerate, is no exception in terms of the prospects of reinforcing it with fiber.…”

Section: Introductionmentioning

confidence: 99%

Structure and Properties Improvement by Recipe Factors of Geopolymer Basalt Fiber Reinforced Concrete for Building Enclosing Structures

Zubarev,

Shcherban’,

Stel’makh

et al. 2024

Buildings

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The application of geopolymer concrete in buildings and structures is becoming widespread because of its low cost and high strength characteristics. At the same time, the capabilities of geopolymer concrete are not fully used, especially to strengthen flexural properties. The article examines the problems of developing an effective composition of geopolymer concrete based on ground granulated blast furnace slag (GGBS) by selecting the optimal composition of the alkaline activator and the amount of basalt fiber (BF). To determine the degree of effectiveness of the proposed formulation solutions, the characteristics of geopolymer fiber-reinforced concrete (FRC) were determined. It has been investigated the most effective composition of an alkaline activator is an activator containing a NaOH solution with a molarity of 12 M. The most optimal dosage of BF is 1.5% by weight of GGBS. The increase in compressive and flexural strength for the most effective composition of geopolymer FRC 12 M/BF1.5, which combines the most effective parameters of formulation solutions, compared to the least effective composition 8 M/BF0 was 40.54% and 93.75%, respectively, and the decrease of water absorption was 45.75%. The obtained scientific result represents a significant empirical basis for future research in the field of geopolymer FRC. The developed effective composition of geopolymer FRC is ready for use in practical construction.

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Development of alkali-activated binders based on technogenic fibrous materials

Cited by 13 publications

References 0 publications

The concept of calculating the strength of reinforced concrete compressed elements with small eccentricities

The concept of calculating the strength of reinforced concrete compressed elements with small eccentricities

Influence of Polymer Fibers on the Structure and Properties of Modified Variatropic Vibrocentrifuged Concrete

Structure and Properties Improvement by Recipe Factors of Geopolymer Basalt Fiber Reinforced Concrete for Building Enclosing Structures

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