Study of Ash-Slag Wastes of Electric Power Plants of Mongolia Applied to their Utilization in Road Construction

Hadbaatar, A.; Mashkin, N.A.; Stenina, N.G.

doi:10.1016/j.proeng.2016.07.111

Cited by 16 publications

(4 citation statements)

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“…From a technical and economic point of view, the addition of ash leads to a reduction in the cost of producing products, reducing the cost of raw materials, reducing the According to the calculations of research organizations, the production of concrete solutions on average per year can consume about 33 million tons of ash and ash and slag. [9] Replacement in concrete of a part of cement to ash, in recalculation to the global volumes of their application, can significantly reduce the amount of carbon dioxide (CO 2 ) emissions into the atmosphere by 270-300 megawatts per year. At this time, less than 0, 6 million tons of ash per year is used in the production of lightweight concrete [10].…”

Section: Examples Of Ash Disposalmentioning

confidence: 99%

Application of ash and slag wastes in the production of building materials

Макарова

Vigovskaya

Bazhenov

2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. One of the most important problems of humanity nowadays is environmental pollution, which affects human health and life. There are nearly 50 million tons of emissions (ashslag wastes) realized in the environment per year, which indicates a physical contamination of nature and deterioration of the ecological situation on Earth. The processing and further use of emissions is a solution that can significantly reduce negative impact from industrial activity on the environment. The use of ash and slag emissions occupies one of the leading positions in this case. Recycled waste can considerably reduce the use of natural raw materials in constructi on industry. Ash-slag wastes, in contrast to natural ash, are not depleted, but on the contrary, their number increases every year, which in turn creates the prospects for their study and use. Replacement of material components with secondary waste will help to solve the problem of processing emissions, reduce the consumption of natural resources and contribute to introducti on of new construction materials based on ash and slag waste. The appearance of such product can solve the problem of shortage of building materials in some regions of Russia (Altai and Primorsky territory). The paper is concerned with the results of complex processing of ash-slag wastes, description of products received by adding the components of such wastes, spheres of application, analysis of obtained characteristics, and comparison of the new product with the concrete without components based on waste.

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Section: Examples Of Ash Disposalmentioning

confidence: 99%

Application of ash and slag wastes in the production of building materials

Макарова

Vigovskaya

Bazhenov

2018

IOP Conf. Ser.: Mater. Sci. Eng.

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“…Особенно остро эта ситуация стоит для золошлаковых смесей (которые согласно многочисленных исследований пригодны для строительства автомобильных дорог [4,5,6,7,8]), что отмечено исследованиями Е.В. Иванова и В.В.…”

Section: Introductionunclassified

Predicting the frost heaving of bottom ash value for road design

et al. 2020

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Introduction. Most of the researchers dealing with the use of ash and slag materials (especially in the construction) have focused on the study of their mechanical characteristics or assessment of their impact on the environment. At the same time, the design of roads with embankments of soil materials in the Northern regions requires taking into account the behavior of materials in cold climates.Although ash and slag materials are a typical dispersed soil, it is prone to frost heaving (due to the peculiarities of the internal structure). In addition, these materials have not been sufficiently tested in the development of the Russian Federation standards and codes for road design. Therefore, the professional environment is developing a hypothesis about the inadmissibility of using ash and slag materials in road embankments due to excessive frost heaving of this material, which, in our opinion, is not the case.Methods of research. To obtain real values of ash and slag frost heaving, specialists of Siberian State Transport University carried out additional studies to determine the relative deformations of frost heaving of medium-grained samples and coarse-grained ash slabs. SibADI specialists compared the results obtained with earlier studies to determine the relative deformations of frost heaving of fine-grained ash slabs samples, and analyzed the entire array of data obtained.Results. As a result of joint work, an empirical model was obtained that makes it possible to predict the amount of frost heaving of ash and slag material depending on its degree of compaction, initial moisture content (when working in a closed circuit or moisture in freezing through an open system), particle size distribution and freezing temperature. This makes it possible to determine the degree of frost heaving of ash and slag systems based on the grain size composition and the calculated characteristics of the subgrade.

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“…Доказано (Shabarov, Aleksandrova, & Nikolaeva, 2016;Hadbaatar, Mashkin, & Stenina, 2016), что накопленные объемы твердых отходов теплоэнергетики могут быть утилизированы с высоким экономическим эффектом. Однако приме-нение золы в различных областях промышленности весьма ограничено в связи с неоднородностью ее состава и большим содержанием несгоревшего угля (до 25%).…”

Section: Introductionunclassified

Recycling of Prydniprovska thermal power plant fly ash

Perkov¹,

Perkova²

2017

Min. miner. depos.

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Purpose. To confirm experimentally the feasibility of complete fly ash recycling at Prydniprovska Thermal Power Plant (TPP) by its refining into industrially valuable products using gravity classification of dry ash from electrostatic precipitators and water-gravity separation of ash from a dump.Methods. Classification of fly ash has been carried out on the modernized processing equipment in the laboratory in two ways. First, ash pneumatic separation was done directly from the electrostatic precipitators using a specially selected vibrating screen. The second way involved hydro-separation of the original product from the ash dump using the upgraded centrifuges and hydrocyclones.Findings. Technological solution for complex processing of fly ashes, based on the "dry" gravitational separation of ash from electrostatic precipitators and "wet" gravitational separation of ash from thermal power plants and storage dumps has been developed. It is established that the addition of active ash up to 33% to 1 m 3 of concrete allows to save up to 25% of cement and increase strength of concrete structures up to 5%. Addition of products manufactured from thermal power plants waste for production of building materials allows to reduce the share of energy consumption up to 20 -25%, which is essential for the competitiveness of construction products. A mixture of alumina-silica products can reduce clay usage in metallurgical industry to 50%. Carbon products are cheap substitutes for production of certain kinds of sorbents. The proposed project solution allows to reduce resource consumption, decrease human impact on the environment, and increase energy potential of the region.Originality. The time dependence related to surface activity decrease of the resulting recycling products from the dry fly ash directly from electrostatic precipitators has been established. Recycling of fly ash into industrially useful products by dry gravity separation allows to achieve the best physical parameters of the raw materials with the highest specific activity.Practical implications. Implementation of the research results will be instrumental in receiving such industrial products as: components in the manufacture of building materials (concrete, foam and aerated concrete, brick), heat insulating material, raw materials for steel industry, sorbents for chemical industry and deoxidants for metallurgical industry. The proposed technological solution is completely environmentally safe and non-waste.

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Study of Ash-Slag Wastes of Electric Power Plants of Mongolia Applied to their Utilization in Road Construction

Cited by 16 publications

References 0 publications

Application of ash and slag wastes in the production of building materials

Application of ash and slag wastes in the production of building materials

Predicting the frost heaving of bottom ash value for road design

Recycling of Prydniprovska thermal power plant fly ash

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