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Prošek, Z. - Tesárek, P., - Palička, A.
Publikováno v
In: Experimental Stress Analysis 2023 Proceedings of Full Papers. Košice: Technical University of Košice, 2024. p. 201-204. 1. ISBN 978-80-553-3677-0.
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2024
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The article focusses on the effects of waste Si-based material on the mechanical properties of the resulting cement pastes. In this study we use Portland cement CEM I 42.5R and Si-based waste materials from the packaging industry from Recifa, a.s. The difference between individual samples was in the concentration of Si-based materials. We investigate the influence of five different amounts of SiO2-based materials, namely, 10 wt. %, 20 wt. %, 30 wt. %, 40 wt. % and 50 wt. %. The determined mechanical properties were compressive and flexural strengths. Mechanical properties were investigated in 7 and 28 day samples with dimensions equal to 40 × 40 × 160 mm. The results showed a negative effect of Si-based materials on mechanical properties.
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Palička, A. - Tesárek, P., - Prošek, Z.
Publikováno v
In: Experimental Stress Analysis 2023 Proceedings of Full Papers. Košice: Technical University of Košice, 2024. p. 169-172. 1. ISBN 978-80-553-3677-0.
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2024
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The article focuses on the investigation of the environmental impact of contaminated by colloidal aggressive substances on a 50-year-old wastewater treatment plant, where the sampling of core boreholes of DN150mm × 370 mm in the tank was made. The properties investigated were the microstructure and compressive strength of the concrete. The results showed that the aggressive environment had no effect on the resulting compressive strength of the concrete.
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Prošek, Z. - Tesárek, P. - Palička, A., - Babčenko, O.
Publikováno v
In: Acta Polytechnica CTU Proceedings. Praha: Czech Technical University in Prague, 2024. p. 108-112. vol. 47. ISSN 2336-5382. ISBN 978-80-01-07309-4.
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2024
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The study delves into the impact of waste silicon-based materials on the mechanical characteristics of the resulting cement pastes. The investigation uses Portland cement CEM I 42.5R in conjunction with silicon-based waste materials sourced from the packaging industry, specifically from Recifa, a.s. Variations between the sample groups arise from differences in the concentration of silicon-based materials and the method of surface treatment. The inquiry seeks to assess the effects of two distinct levels of Si-based material incorporation, namely 10 wt. % and 20 wt. %, along with plasma treatment involving two different gases: oxygen (O2) and hydrogen (H2). The mechanical attributes under scrutiny encompass compressive and flexural strengths. The evaluation of mechanical properties is carried out on samples aged 28 days, with dimensions measuring 20 × 20 × 100 mm.