The Investigation of Compacting Cement Systems for Studying the Fundamental Process of Cement Gel Formation

Beskopylny, Alexey; Stel’makh, Sergey A.; Shcherban’, Evgenii M.; Mailyan, Levon R.; Meskhi, Besarion; Beskopylny, Nikita; El’shaeva, Diana; Kotenko, Maria

doi:10.3390/gels8090530

Cited by 19 publications

(14 citation statements)

References 46 publications

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“…When assessing the effect of the organic substances that form DJM, it was found that the dead jellyfish mass also had surface-active properties. Based on the analyzed literature [28][29][30][31][32][33][34][35][36][37]55], the feasibility of using surfactants in concrete and concrete mixtures can be reflected in the form of an Ishikawa cause-and-effect diagram presented in Figure 18.…”

Section: Resultsmentioning

confidence: 99%

“…The use of such a technological technique is more appropriate in regions where there is an environmental problem with the release of dead jellyfish from water bodies. The study of the addition of dead jellyfish mass in variotropic concrete is promising [47,55]. Dead jellyfish mass can be used for the manufacture of concrete and reinforced concrete structures operated in air-dry conditions, water, and aggressive solutions, as well as sea water, in order to improve the technological properties of concrete mixtures, increase the strength of concrete, and reduce cement consumption.…”

Section: Discussionmentioning

confidence: 99%

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The Structure Features and Improvement of Concrete Properties with Dead Jellyfish Mass

Beskopylny,

Stel’makh,

Shcherban’

et al. 2023

Sustainability

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Currently, there is an environmental problem associated with cleaning the seas and oceans from a large number of dead jellyfish thrown ashore and into the coastal zone, which is urgent and requires solutions. This research aims to study the formation and properties of cement and concrete with added jellyfish mass and to understand the effects of this addition. Tests were carried out on formulations containing dead jellyfish mass in amounts from 0.2% to 1.6%. This study focused on the density, shear stress, workability, water separation, strength, and water absorption of cement and concrete, which are the main properties that characterize cement and concrete in construction. Adding 0.6% dead jellyfish to this composition resulted in greater effectiveness compared to the control composition. With this dosage, the normal density of the cement paste decreased by 16.3%, there was a 32% decrease in ultimate shear stress, the workability expressed in the cone slump increased by 60.8%, the water separation of cement decreased by 19.7%, the increase in compressive strength was 10.6%, and water absorption decreased by 15.5%. An analysis of the structure showed that the modification of concrete with dead jellyfish mass reduces the defectiveness of a concrete structure compared to the composition of the control structure.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

The Structure Features and Improvement of Concrete Properties with Dead Jellyfish Mass

Beskopylny,

Stel’makh,

Shcherban’

et al. 2023

Sustainability

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“…Considering the fact that more effective types of variatropic concretes have been previously established, specifically those obtained using vibration centrifugation technology, it will be interesting to study the structure, properties, and their mutual influence depending on the composition of vibrocentrifuged variatropic concretes based on polypropylene fiber. Given that we have previously established options for effective modification of vibrocentrifuged variatropic concretes with finely dispersed components [ 23 , 53 , 54 ], an even more interesting question is the study of polymer polypropylene fiber reinforcement of vibrocentrifuged variatropic concretes modified with various additives. Based on this, we formulate the purpose and objectives of this study.…”

Section: Introductionmentioning

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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“…This is a record value that exceeded the values of previous years (419 ppm for 2021 and 417 ppm for 2020) [ 6 ]. Several studies have been devoted to solving a similar problem—the disposal of agricultural, industrial waste, fuel, and energy complex in concrete, but at the same time in concrete based on cement [ 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 ]. At the same time, it should be noted that geopolymer concretes are even more promising, environmentally friendly, and economical due to the absence of clinker binders in them and the use of more environmentally friendly cheap components in their composition, which can significantly approach the implementation of the global environmental agenda.…”

Section: Introductionmentioning

confidence: 99%

Analytical Review of Geopolymer Concrete: Retrospective and Current Issues

Meskhi,

Beskopylny,

Stel’makh

et al. 2023

Materials

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The concept of sustainable development provides for the search for environmentally friendly alternatives to traditional materials and technologies that would reduce the amount of CO2 emissions into the atmosphere, do not pollute the environment, and reduce energy costs and the cost of production processes. These technologies include the production of geopolymer concretes. The purpose of the study was a detailed in-depth analytical review of studies of the processes of structure formation and properties of geopolymer concretes in retrospect and the current state of the issue. Geopolymer concrete is a suitable, environmentally friendly and sustainable alternative to concrete based on ordinary Portland cement (OPC) with higher strength and deformation properties due to its more stable and denser aluminosilicate spatial microstructure. The properties and durability of geopolymer concretes depend on the composition of the mixture and the proportions of its components. A review of the mechanisms of structure formation, the main directions for the selection of compositions and processes of polymerization of geopolymer concretes has been made. The technologies of combined selection of the composition of geopolymer concrete, production of nanomodified geopolymer concrete, 3D printing of building structures from geopolymer concrete, and monitoring the state of structures using self-sensitive geopolymer concrete are considered. Geopolymer concrete with the optimal ratio of activator and binder has the best properties. Geopolymer concretes with partial replacement of OPC with aluminosilicate binder have a denser and more compact microstructure due to the formation of a large amount of calcium silicate hydrate, which provides improved strength, durability, less shrinkage, porosity and water absorption. An assessment of the potential reduction in greenhouse gas emissions from the production of geopolymer concrete compared to the production of OPC has been made. The potential of using geopolymer concretes in construction practice is assessed in detail.

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The Investigation of Compacting Cement Systems for Studying the Fundamental Process of Cement Gel Formation

Cited by 19 publications

References 46 publications

The Structure Features and Improvement of Concrete Properties with Dead Jellyfish Mass

The Structure Features and Improvement of Concrete Properties with Dead Jellyfish Mass

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

Analytical Review of Geopolymer Concrete: Retrospective and Current Issues

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