Analyzing the Technology of Using Ash and Slag Waste from Thermal Power Plants in the Production of Building Ceramics

Malchik, A G; Litovkin, S V; Rodionov, P. V.; Козик, В. В.; Gaydamak, M A

doi:10.1088/1757-899x/127/1/012024

Cited by 11 publications

(5 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The freshly precipitated aluminum hydroxide can undergo a secondary reaction with sodium hydroxide according to Reaction (15):…”

Section: Investigation Of the Properties Of Synthesized Foamed Geopol...mentioning

confidence: 99%

“…Geopolymer production minimizes carbon dioxide emissions and eliminates the need for energyintensive high-temperature processes, which can reach up to 1500 • C in cement production. Furthermore, the incorporation of technogenic waste materials into geopolymer production diminishes the consumption of precious and limited natural resources, rendering their production both carbon neutral and resource-efficient [15].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Recycling of Coal Combustion Waste through Production of Foamed Geopolymers with Improved Strength

Yatsenko,

Goltsman,

Novikov

et al. 2023

Sustainability

View full text Add to dashboard Cite

Recycling of industrial waste into useful materials is a crucial aim for achieving sustainable development in materials science. The use of production waste in the manufacture of construction materials contributes to improving the environmental situation and reducing the cost of the final product. This article examines the utilization of coal combustion waste recycled into foamed geopolymers and ways of enhancing their strength properties through the introduction of strengthening additives. Eight compositions of foamed geopolymers containing different strengthening additives were synthesized. Inorganic substances (CaO, MgO, ZnO, TiO2, Al2O3, SiC, and ZrO2) were chosen as strengthening additives that were introduced in an amount of 3% (over 100%). The physical and mechanical properties (density, compressive strength, porosity, and pore size distribution) of the obtained samples were studied and compared. Magnesium oxide MgO and aluminum oxide Al2O3 were chosen as the best strengthening additives. Magnesium oxide allows geopolymer materials with the lowest density to be obtained. Aluminum oxide can significantly increase the strength of geopolymers. The phase composition of the samples contains new crystalline phases in the form of α-alumina and periclase. The porous structure is homogeneous and meets the requirements for foamed thermal insulation materials. The strengthening effect of the chosen additives was verified using geopolymers based on different waste from Novocherkassk SDPP.

show abstract

“…The freshly precipitated aluminum hydroxide can undergo a secondary reaction with sodium hydroxide according to Reaction (15):…”

Section: Investigation Of the Properties Of Synthesized Foamed Geopol...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Recycling of Coal Combustion Waste through Production of Foamed Geopolymers with Improved Strength

Yatsenko,

Goltsman,

Novikov

et al. 2023

Sustainability

View full text Add to dashboard Cite

show abstract

“…-строительная отрасль (производство цемента [5], бетона [6][7][8], керамических изделий [9][10][11], теплоизоляционных материалов [12][13][14][15][16], дорожное строительство [17][18][19][20], закладочные смеси для заполнения земляных выработок при добыче полезных ископаемых [21,22]);…”

Section: результатыunclassified

Applications of ash аnd slag waste in agriculture

Paleev

Khudyakova

2022

jour

View full text Add to dashboard Cite

Environmental pollution creates problems for health of people living in residential areas near pollution sources. Studies aimed at developing methods for investigating the impact of industrial facilities on the air is of interest. The purpose of this work is to analyze the methodology for assessing the risk of exposure of a technosphere object to the atmosphere. It was assumed that the enterprise in emergency mode emits pollutants through the source of emissions at the maximum single concentration of the substance exceeding the maximum permissible concentration. To calculate the impact on a human, various scenarios of an emergency situation are taken into account. These are constructing failure trees and using well-known health risk assessment techniques. The calculation took into account the wind rose for a specific enterprise location and wind speed projections obeying the normal distribution law. These assumptions allowed us to develop a method for calculating the risk of exceeding the concentration of a pollutant at a given point (x, y) during the year. Isolines of surface concentrations were built. Three toxic substances were taken for analysis. The method for calculating the dispersion of emissions of harmful (polluting) substances in the atmospheric airwas used; maps of the dispersion of isolines of pollutants in residential areas were constructed. When solving the inverse problem, emergency emission intensities at which excess of permissible concentrations occurred were determined. In the range of multiplicities exceeding the maximum single maximum permissible concentration from 1 to 5, the dependence was well approximated by a straight line. This technique can be used to determine the risk of diseases caused by carcinogenic and noncarcinogenic substances and minimize the risk of exposure to harmful substances. Ash and slag wastes are the source of negative impact on the environment. This area is studied by a number of researchers. The article aims to systematize the data on possible applications, accumulated practical experience of using ash and slag waste in agriculture both in Russia and abroad. The analysis showed that waste from the fuel and energy industry can be widely used in various areas of agriculture. It can be used as ameliorants, zeolite-based mineral fertilizers, pesticides and insecticides for treating horticultural crops, microfertilizers, as well as for soil remediation and land reclamation. The use of ash and slag waste in agriculture and other sectors of the national economy can reduce the ecological load on the environment. The number of overfilled ash dumps can be reduced, and there will be no need to build new ones.

show abstract

“…These enterprises include thermal power plants, thermal power plants, coal enrichment, ferrous and nonferrous metallurgy. What not to say about the experience of foreign countries [4]. The way of using man-made materials as mineral raw materials is practiced in Poland, where metallurgical slags are exported to neighboring countries for the production of road pavement and construction materials [5].…”

Section: Introductionmentioning

confidence: 99%

Use of recycled waste in the production of building materials

Zhulasheva

Abisheva

2022

tbus

View full text Add to dashboard Cite

With the development of modern society, technological progress does not stand still. Mankind is constantly in search of new ideas and ways of implementation. This article of the authors is part of the modernization of the existing system of production of building materials. The authors propose to use secondary raw materials for the manufacture of a standard product, confirm them with laboratory tests and results. The indicators of the modified concrete mixture with the addition of ash-and-slag waste from the local industrial sector gave a density not inferior to the heavy concrete of 1.8 g/cm3. Positive effect is obtained by using hydraulic press, where at equal ratio of components due to pressing, all samples were transferred to a number of heavy concretes with a density of 1.8 to 2.5 g/cm3. Moreover, it was found that there are reserves of cement saving in the application of ash in the case of samples prepared by means of hydraulic press, as well as to correct the composition of concrete it is required to carry out a full-scale experiment with the joint action of vibration and pressing. Strength tests of samples show that there is an optimum quantity of ash and slag in the formulation, at that not only the standard requirements for the quality of construction products are met, but also exceeds some characteristics of products according to the requirements of standards.

show abstract

Analyzing the Technology of Using Ash and Slag Waste from Thermal Power Plants in the Production of Building Ceramics

Cited by 11 publications

References 2 publications

Recycling of Coal Combustion Waste through Production of Foamed Geopolymers with Improved Strength

Recycling of Coal Combustion Waste through Production of Foamed Geopolymers with Improved Strength

Applications of ash аnd slag waste in agriculture

Use of recycled waste in the production of building materials

Contact Info

Product

Resources

About