Improvement of technical means for recycling of technogenic waste to construction fiber

Klyuev, Sergey; Sevostyanov, V. S.; Sevostyanov, Maxim V.; Федюк, Роман; Sabitov, Linar; Ageeva, Marina; Фомина, Е. В.; Klyuev, A.V.; Protsenko, A. M.; Goryagin, Pavel; Babukov, V. A.; Shamgulov, R. Yu.

doi:10.1016/j.cscm.2022.e01071

Cited by 5 publications

(2 citation statements)

References 34 publications

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“…Numerous studies explore specific issues of the circular economy in firms with different levels of environmental awareness or experience in different industries among leading manufacturers and traditional manufacturers, with the most studied industries being IT and electronics, automotive, chemicals and food, as shown by Botezat et al [53]. Recent interesting studies explore and validate the circular economy's application in constructions such as the study by Teixeira Marvila et al [54] regarding the use of cementation ceramics in construction materials, the study by Awoyera and Adesina [55] regarding the use of plastic waste for construction applications or the study by Klyuev et al [56] regarding the usage of fibrous waste in construction materials.…”

Section: Literature Reviewmentioning

confidence: 99%

How Does the Circular Economy Applied in the European Union Support Sustainable Economic Development?

et al. 2022

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This research paper aims to find a causal relationship between the circular economy and sustainable economic development. The implementation of the circular economy in the European Union requires, on the one hand, smart regulation and on the other hand, the long-term involvement of all actors in society at all levels—member states, regions, cities, businesses, citizens—and their ability to develop cooperation networks and suitable collaboration and exchange patterns. Moreover, the circular economy is based on business models for reusing, recycling and recovering materials in the production and consumption of goods. This research establishes correlations between circular economy performance measurement indicators and sustainable economic development using panel analysis. Statistically significant correlations were noted between GDP per capita and three independent variables, mainly due to the high R-squared coefficient. This research’s innovation contribution is related to the selection and combination of circular economy indicators. Finally, the results confirmed that an increase in the recycling rate of municipal waste and a decrease in environmental tax revenues and environmental protection expenditures led to an increase in GDP per capita and sustainable economic development.

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Section: Literature Reviewmentioning

confidence: 99%

How Does the Circular Economy Applied in the European Union Support Sustainable Economic Development?

et al. 2022

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“…From ancient times to the present, both natural and technogenic clay minerals were used as additives to cement materials. Pozzolanic activity of thermally activated clays in cement-lime composites depends on the degree of dehydration and chemical transformation of individual minerals during heat treatment [19][20][21].…”

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confidence: 99%

Использование Глиносодержащих Отходов В Качестве Пуццолановых Добавок

Gerasimov

Ustinov

Zyryanova

2023

PMI

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Growing productivity of mining and processing enterprises entails an increase in the volumes of liquid tailings impoundments and upstream impoundments of ore processing waste. Enterprises face the challenge of minimizing the environmental impact of waste and guaranteeing the sanitary and epidemiological safety of population. The article presents a possibility of recycling one type of such waste (clay-containing concentration tailings of apatite-nepheline and sylvinite ores, coal beneficiation tailings) by using them after preliminary thermochemical treatment as pozzolanic additives to cements and concretes, including concrete mixtures used for soil stabilization, development of territories, reclamation of mine workings, as a component of the insulating layer of landfills for the disposal of municipal solid waste. An analysis of the phase changes of kaolinite, one of the main minerals that make up clay-containing waste, in the temperature range of 200-1,000 °С showed that a change in its mineral form during heat treatment is the main factor in changing its pozzolanic activity. The effect of heat treatment of clay minerals at temperature of 700-800 °C on their pozzolanic activity, estimated by the ability to absorb calcium hydroxide (0.7 g Ca(OH)2 per 1 g of modified kaolinite), is considered. It is shown that the addition of heat-treated samples (20 % by weight) improves the quality of cement increasing its activity by 15 %, in comparison with the use of unmodified clay minerals. It was proved experimentally that partial replacement of Portland cement with thermally modified kaolinite increases the strength of consolidating stowing mixture by up to 15 %. This approach to processing of ores containing layered silicates, which provides for thermochemical modification of run-of-mine ore, intensifies the processes of tailings thickening and filtering.

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