Properties of ash microspheres as fillers in mixtures for masonry




fly ash microspheres, properties, composition, thermal power plant, fraction, phase, mineralogical composition, surface energy com­position


Introduction. Due to the active develop­ment of the construction industry, there is a need for building materials with certain thermal insulation properties, which require the use of modern binders with the necessary set of spe­cified properties.
Problem. Solving the problem of using do­mestic fly ash microspheres as fillers in buil­ding materials is of considerable scientific and practical interest.
The aim of the article is to evaluate the properties of fly ash microspheres as a com­modity used for filling building materials.
Methods.Therehave been studiedfly ash microspheres of Kurakhivska, Prydniprovska, Kryvyi Rih, Burshtynskaand TrypillskaTPPs. Determination of the composition of fly ash microspheres was performed by IR-spectro­scopic analysis, crystal structure–X-ray phase, particle size distribution - sieve method.
Results. The position of the maxima of the bands responsible for the deformation oscilla­tions of the Si-O bonds of the fly ash micro­spheres is in the range of 444.1–463.2 cm-1. These materials have intensity values in the range of 0.76–1.58. Regarding the energy homogeneity of Si-O bonds, the fly ash microspheres are loca­ted as they decrease: Trypilska TPP> Kura­khivska TPP> Kryvyi Rih TPP. The fly ash microspheres of Burshtynska and Prydniprovska TPPs have a relatively higher content of adsorbed water than the rest.
In the composition of the studied fly ash microspheres, the crystal phase is predominant, with the exception of Kurakhivska TPP.
The analysis of the particle size distribution of the studied samples of fly ash microspheres showed that the fraction of 60–200 μm has the highest content. The largest fraction of 400–630 μm is absent in all samples.
Conclusions. It is established that the pre­dominant components of the chemical compo­si­tion of the studied fly ash microspheres are oxi­des of silicon and aluminum for Trypilska TPP, and for Prydniprovska – only aluminum oxides.
Studies of the properties of fly ash micro­spheres by IR-spectroscopy have shown that the microspheres of Burshtynska and Prydniprov­ska TPPs have a relatively higher water content, which when used as a filler for building materials reduces the density of the latter.
The study of the particle size distribution of fly ash microspheres proved their fineness, which allows their use as a filler in building materials without additional grinding and significantly reduces the financial costs of their production.

Author Biographies

Valentyna POLIUHA, State University of Trade and Economics

PhD (Technical Sciences), Associate Professor at the Department of Commodity Science and Customs Affairs

Oksana ZOLOTARIOVA, State University of Trade and Economics

PhD (Technical Sciences), Associate Professor, Associate Professor at the Department of Commodity Science and Customs Affairs

Maryna ZHALDAK, State University of Trade and Economics

Doctor of Philosophy (Technical Sciences), senior lecturer at the Department of Commodity Science and Customs Affairs


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How to Cite

POLIUHA В. ., ZOLOTARIOVA О. ., & ZHALDAK М. . (2022). Properties of ash microspheres as fillers in mixtures for masonry. Commodities·and·markets, 41(1), 81–91.