Variability in the Distinctive Features of Silica Sands in Central Europe
Author(s): |
Martina Bašistová
Jiřina Vontorová Simona Zlá Monika Kawuloková Petr Lichý Tomáš Dvorský |
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Medium: | journal article |
Language(s): | English |
Published in: | Buildings, 31 December 2023, n. 1, v. 14 |
Page(s): | 279 |
DOI: | 10.3390/buildings14010279 |
Abstract: |
Quality quartz sand is globally utilized in construction due to its availability and economic factors, especially in the production of composite cements. Despite its positive properties, quartz sand also has several disadvantages. The dilation of quartz sand can be technologically significant for certain high-temperature applications. This dilation has a non-continuous character with sharp volume change caused by the phase transformation from β to α SiO₂ at temperatures around 573 °C. The extent of dilation depends on various factors such as compaction, grain size, the quantity of sand, as well as the shape and character of the grain and chemical purity, particularly the SiO₂ content. In this study, six types of quartz sand from different locations in Central Europe were examined, and the influence of chemical composition and grain shape was correlated with the final dilation of these samples. Evaluation methods included X-ray fluorescence spectroscopy (XRFS), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), differential thermal analysis (DTA), and linear thermal expansion analysis. It was found that angular grains, despite their chemical purity, may exhibit minimal dilation. Conversely, the least suitable combination in terms of dilation appears to be a high SiO₂ content and high roundness of grains with a smooth surface. |
Copyright: | © 2023 by the authors; licensee MDPI, Basel, Switzerland. |
License: | This creative work has been published under the Creative Commons Attribution 4.0 International (CC-BY 4.0) license which allows copying, and redistribution as well as adaptation of the original work provided appropriate credit is given to the original author and the conditions of the license are met. |
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10760201 - Published on:
23/03/2024 - Last updated on:
25/04/2024