Properties of fly ash and slag from power plants

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Published: 2016-10-28
DOI: https://doi.org/10.4154/gc.2016.26
Keywords:
fly ash, slag, physical composition, chemical composition, mineral composition, X-Ray Diffraction method

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Miloš Šešlija
University of Novi Sad, Department of Civil Engineering and Geodesy
Aleksandra Rosić
University of Belgrade, Faculty of Mining and Geology
Nebojša Radović
University of Novi Sad, Department of Civil Engineering and Geodesy
Millinko Vasić
University of Novi Sad, Department of Civil Engineering and Geodesy
Mitar Đogo
University of Novi Sad, Department of Civil Engineering and Geodesy
Milovan Jotić
Highway institute, Belgrade

Abstract

This paper describes the physical, chemical and mineral properties of ash and slag, which were taken from thermal power plants Nikola Tesla A, Nikola Tesla B, Kostolac A and Kostolac B. The knowledge of the mineralogical material composition is important because the type of minerals directly determines the properties of the fly ash and slag and their possible application. Laboratory tests showed that ash and slag samples consist of the following minerals: amorphous materials, quartz, feldspar, mullite, melilite, cristobalite, haematite and calcite. The fly ash and slag chemical properties are the most important indicators in the evaluation of their suitability as a building material. The ash and slag chemical composition is composed of the following chemical components: SiO2, Al2O3, Fe2O3, CaO, MgO, SO3, S, Na2O and K2O. Results of laboratory tests show that fly ash and slag have variable chemical, mineralogical and physical properties that are dependent on the natural composition, quality of coal from basin, the manner of combustion and place of ash deposition.

Article Details

Issue

Vol. 69 No. 3 (2016)

Section

Original Scientific Papers

Authors have copyright and publishing rights on all published manuscripts.

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