Nanomodified Concrete with Enhanced Characteristics Based on River Snail Shell Powder

Stel’makh, Sergey A.; Shcherban’, Evgenii M.; Beskopylny, Alexey; Mailyan, Levon R.; Meskhi, Besarion; Beskopylny, Nikita; Dotsenko, Natal’ya; Kotenko, Maria

doi:10.3390/app12157839

Cited by 12 publications

(5 citation statements)

References 53 publications

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“…Its thermal and sound insulation, and fire resistance, make it as one of the most widely used construction material [111]. Waste shells can be incorporated as asphalt modifiers, where they improve its consistency, hardness, elasticity, recovery, resistance to deformation of bituminous binders, and a number of other characteristics [112,113].…”

Section: Constructionmentioning

confidence: 99%

Shell Waste Management and Utilization: Mitigating Organic Pollution and Enhancing Sustainability

Popović

Lorencin²,

Strunjak‐Perović

et al. 2023

Applied Sciences

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Every year, close to 8 million tons of waste crab, shrimp and lobster shells are produced globally, as well as 10 million tons of waste oyster, clam, scallop and mussel shells. The disposed shells are frequently dumped at sea or sent to landfill, where they modify soils, waters and marine ecosystems. Waste shells are a major by-product, which should become a new raw material to be used to the best of their potential. There are a number of applications for waste shells in many fields, such as agriculture, medicine, chemical production, construction, environmental protection, cosmetic industry, food and feed industry, and a plethora of other (often niche) applications, which are being developed by the day. This review provides a broad picture of crustacean and mollusc shell waste management and reutilization possibilities, reviewing well established, current, and potential strategies, particularly from the standpoint of sustainability challenges and energy demand.

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Section: Constructionmentioning

confidence: 99%

Shell Waste Management and Utilization: Mitigating Organic Pollution and Enhancing Sustainability

Popović

Lorencin²,

Strunjak‐Perović

et al. 2023

Applied Sciences

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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 study presented in this article develops the ideas of the concept of sustainable environmentally friendly concrete, which implies the partial and complete replacement of the mineral components of concrete with natural and rapidly renewable analogues. Replacing large-mineral aggregate with walnut shells will partially eliminate complex mechanized and energy-intensive production processes associated with high greenhouse-gas emissions [ 36 , 37 , 38 , 39 , 40 , 41 , 42 ]. At the same time, it is important to find a balance between the strength and density of the resulting composite, so that a decrease in the SC of the material is accompanied by a commensurate decrease in the density of the material.…”

Section: Introductionmentioning

confidence: 99%

Effect of Walnut-Shell Additive on the Structure and Characteristics of Concrete

et al. 2023

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The partial replacement of the mineral components of concrete with natural renewable analogues in full possession of the performance characteristics of the final material, allows not only the concrete-production process to be made more environmentally friendly and inexpensive, but also to solve an important task for the agricultural industry, which is that associated with waste disposal. The scientific novelty of the work is in the obtaining of new concrete compositions by the partial replacement of coarse aggregate with a natural analogue in the form of a walnut shell, which has the maximum ratio of the strength of the composite to its density, as well as in identifying new dependencies of strength and density and their ratio on the amount of replacement of mineral coarse-aggregate walnut shell. The main goal of this article was to analyze the effect of composition factors on characteristics of concrete with partial replacement of large aggregates with walnut shells and to search for the optimal compound that would make it possible to obtain concrete with a minimum decrease in strength characteristics with a maximum decrease in concrete density. Cubes and prism laboratory samples were made from concrete of normal density with the replacement of coarse aggregate by 5, 10, 15, 20, 25 and 30%, by volume. The main mechanical properties, such as density, strength (compressive, tensile, tensile strength in bending) of the concrete samples were studied. The investigation used standard methods and scanning electron microscopy. An increase into strength characteristics up to 3.5%, as well as the maximum ratio of strength to density of concrete, was observed at a walnut-shell dosage of 5%. Effective partial replacement of coarse aggregate with walnut shells leads to a reduction in the consumption of crushed stone by up to 10% and a decrease in the mass of concrete by up to 6%.

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Nanomodified Concrete with Enhanced Characteristics Based on River Snail Shell Powder

Cited by 12 publications

References 53 publications

Shell Waste Management and Utilization: Mitigating Organic Pollution and Enhancing Sustainability

Shell Waste Management and Utilization: Mitigating Organic Pollution and Enhancing Sustainability

Analytical Review of Geopolymer Concrete: Retrospective and Current Issues

Effect of Walnut-Shell Additive on the Structure and Characteristics of Concrete

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