Projekt badawczy

Publikacje, które powstały w wyniku realizacji projektu

1. Monitoring hydration of Sr-doped calcium zirconium aluminate (Ca,Sr)7ZrAl6O18 cement via electrochemical impedance spectroscopy (EIS) and supported techniques; Dominika Madej, Andrzej Kruk; Construction and Building Materials 206 (2019) 307-320;
   link do publikacji
2. Synthesis, characterization and hydration analysis of Ba2+, Cu2+ or Bi3+-doped CaO-Al2O3-ZrO2-based cements; Dominika Madej, Renata Boris; Journal of Thermal Analysis and Calorimetry, 2019, DOI: 10.1007/s10973-019-08142-7;
3. A new implementation of electrochemical impedance spectroscopy (EIS) and other methods to monitor the progress of hydration of strontium monoaluminate (SrAl2O4) cement; Dominika Madej; Journal of Thermal Analysis and Calorimetry, (2019). https://doi.org/10.1007/s10973-019-08423-1;
   link do publikacji
4. Structure, microstructure and thermal stability characterizations of C3AH6 synthesized from different precursors through hydration; Ewa Litwinek, Dominika Madej; Journal of Thermal Analysis and Calorimetry (2019) https://doi.org/10.1007/s10973-019-08656-0;
   link do publikacji
5. Synthesis and hydration behaviour of calcium zirconium aluminate powders by modifying co-precipitation method; Dominika Madej, Maria Rajska, Andrzej Kruk; Ceramics International, 2019, https://doi.org/10.1016/j.ceramint.2019.09.228;
   link do publikacji
6. Strontium Retention of Calcium Zirconium Aluminate Cement Paste Studied by NMR, XRD and SEM-EDS; Dominika Madej; Materials 2020, 13(10), 2366, MDPI;
   link do publikacji

   This work concerns the hydration mechanism of calcium zirconium aluminate as a ternary compound appearing in the CaO-Al2O3-ZrO2 diagram besides the calcium aluminates commonly used as the main constitutes of calcium aluminate cements (CACs). Moreover, a state-of-the-art approach towards significant changes in hydraulic properties was implemented for the first time in this work, where the effect of structural modification on the hydration behavior of calcium zirconium aluminate was proved by XRD, 27Al MAS NMR and SEM-EDS. The substitution of Sr2+ for Ca2+ in the Ca7ZrAl6O18 lattice decreases the reactivity of Sr-substituted Ca7ZrAl6O18 in the presence of water. Since the original cement grains remain unhydrated up to 3 h (Ca7ZrAl6O18) or 72 h (Sr1.25Ca5.75ZrAl6O18) of curing period in the hardened cement paste structures, strontium can be considered as an inhibition agent for cement hydration. The complete conversion from anhydrous 27AlIV to hydrated 27AlVI species was achieved during the first 24 h (Ca7ZrAl6O18) or 7 d(Sr1.25Ca5.75ZrAl6O18) of hydration. Simultaneously, the chemical shift in the range of octahedral aluminum from ca. 4 ppm to ca. 6 ppm was attributed to the transformation of the hexagonal calcium aluminate hydrates and Sr-rich (Sr,C)3AH6 hydrate into the cubic phase Ca-rich (Sr,C)3AH6 or pure C3AH6 in the hardened Sr-doped cement paste at the age of 7 d. The same 27Al NMR chemical shift was detected at the age of 24 h for the reference hardened undoped Ca7ZrAl6O18 cement paste.

7. A novel method for ceramic characterisation by high frequency microwave energy absorption; Andrzej Kruk, Jakub Sorocki, Ilona Piekarz, Dominika Madej, Piotr Kolenderski; Measurement, 2020, https://doi.org/10.1016/j.measurement.2020.108160;
   link do publikacji
8. Structural properties and Faraday effect of arc melted magnesia transparent polycrystal; Andrzej Kruk, Dominika Madej; Optical Materials Volume 108, October 2020, 110245;
   link do publikacji
9. Design, structure, microstructure and gamma radiation shielding properties of refractory concrete materials containing Ba- and Sr-doped cements; Dominika Madej, Michał Silarski, Szymon Parzych; Materials Chemistry and Physics, Volume 260, 15 February 2021, 124095;
   link do publikacji

   Highlights

   - Ba- and Sr-doped cements belonging to the CaO-Al₂O₃-ZrO₂ system were proposed for heavy concretes.

   - Mechanical, physical and gamma-ray attenuation properties of (CaO,SrO,BaO)-Al₂O₃-SiO₂-ZrO₂ concretes are presented.

   - Difference in gamma ray attenuation properties of green and sintered castables was highlighted.

   - Radioactive sources 22Na, 137Cs, 60Co, 133Ba and 152Eu were used in this study.

   - Sr and Ba elements were chemically bonded within both hydrated cement matrix and the ceramic matrix of concrete.

10. Synthesis and performance of aluminous cements containing zirconium and strontium as alternatives to the calcium aluminate cements designed for the production of high performance refractories; Dominika Madej, Katarzyna Sieroń, Andrzej Kruk; Cement and Concrete Composites Volume 130, July 2022, 104518;
    link do publikacji