0599939 - ÚSMH 2025 RIV NL eng J - Článek v odborném periodiku
Perná, Ivana - Zárybnická, Lucie - Mácová, Petra - Šupová, Monika - Ševčík, Radek
Physico-mechanical properties of geopolymers after thermal exposure: Influence of filler, temperature and dwell time.
Construction and Building Materials. Roč. 451, November (2024), č. článku 138893. ISSN 0950-0618. E-ISSN 1879-0526
Grant ostatní: AV ČR(CZ) StrategieAV21/23
Program: StrategieAV
Institucionální podpora: RVO:67985891 ; RVO:68378297
Klíčová slova: Geopolymers * Filler * Thermal exposure * Physical properties * Mechanical properties
Obor OECD: Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; Materials engineering (UTAM-F)
Impakt faktor: 7.4, rok: 2023 ; AIS: 1.021, rok: 2023
Způsob publikování: Open access
Web výsledku:
https://doi.org/10.1016/j.conbuildmat.2024.138893DOI: https://doi.org/10.1016/j.conbuildmat.2024.138893

Geopolymers offer increasingly better physico-mechanical properties concerning thermal exposure at high temperatures compared to ordinary Portland cements (OPC). This paper aims to comprehensively study the use of different types of fillers with different particle size distributions in terms of type (silica sands and cordierites) and surface area, loaded at different temperatures and dwell times (30 min and 180 min). After thermal exposure in the temperature range of 100–1000 °C, geopolymer samples were evaluated regarding physico-mechanical properties compared to samples without thermal exposure, using OPC as a reference material. Geopolymer samples were found to have a denser microstructure than OPC, supporting their better resistance to elevated temperature conditions. In addition, the influence of different filler compositions on the resulting internal structure and porosity was demonstrated. Samples containing fillers in two particle size ranges showed better densification than samples with one particle size range.
Conversely, OPC samples showed the least favourable results. In addition, the mechanical behaviour of the geopolymers under static loading, especially in bending and compression tests, showed that the prepared geopolymers exhibited better properties than Portland cement at elevated temperatures, especially in the range of 500–1000 °C. In conclusion, appropriately designed geopolymer compositions have the potential to be a sustainable material, a high-performance alternative to traditional building materials.

Trvalý link: https://hdl.handle.net/11104/0358095