The Influence of High Temperature on the Properties of Modified Cement Stone
- Authors: Chayka T.V.1, Gavrish V.M.1, Oleynik A.Y.1
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Affiliations:
- Sevastopol State University
- Issue: No 7 (2024)
- Pages: 54-59
- Section: Results of scientific research
- URL: https://ter-arkhiv.ru/0585-430X/article/view/635047
- DOI: https://doi.org/10.31659/0585-430X-2024-826-7-54-59
- ID: 635047
Cite item
Abstract
The influence of highly dispersed tungsten-containing powders (WC, WO3, a mixture of WC, TiC) obtained as a result of recycling of carbide products on change in the structural and physico-mechanical properties of cement materials at elevated temperatures has been studied. Powders of tungsten carbide WC, tungsten oxide WO3, mixtures of tungsten and titanium carbides WC, TiC (average particle size 20–150 nm, agglomerates 300 nm – 1.5 microns) were added to the cement mortar, by partial replacement of the binder, in various concentrations (1–5 wt. %). The effect of additives on the thermal stability of cement samples was assessed by weight loss, residual compressive strength, exposed to temperatures at 300, 600 and 800оC for 2 hours. The microstructural analysis was performed using scanning electron microscopy (SEM) with an integrated energy dispersion analysis system. It was established that in the entire temperature range under consideration (20–800оC), the modified samples demonstrate a denser microstructure, have less mass loss and have increased residual compressive strength compared with the control composition. The obtained research results are of considerable value for understanding the mechanisms of influence of highly dispersed tungsten-containing particles on the characteristics of cement materials under high-temperature exposure.
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About the authors
T. V. Chayka
Sevastopol State University
Author for correspondence.
Email: TVChayika@sevsu.ru
Senior Lecturer
Russian Federation, SevastopolV. M. Gavrish
Sevastopol State University
Email: vmgavrish@mail.sevsu.ru
Candidate of Sciences (Engineering), Associate Professor
Russian Federation, SevastopolA. Yu. Oleynik
Sevastopol State University
Email: ayoleinik@mail.sevsu.ru
Postgraduate Student, Assistant
Russian Federation, SevastopolReferences
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