Detail publikačního výsledku

Effects of low-dose gamma irradiation on mechanical and microstructural properties of barite-modified geopolymer and cement mortars

JÓŹWIAK-NIEDŹWIEDZKA, D.; ROVNANÍK, P.; GMÉLING, K.; HOMLOK, R.; DENIS, P.

Originální název

Effects of low-dose gamma irradiation on mechanical and microstructural properties of barite-modified geopolymer and cement mortars

Anglický název

Effects of low-dose gamma irradiation on mechanical and microstructural properties of barite-modified geopolymer and cement mortars

Druh

Článek WoS

Originální abstrakt

This study investigates the effects of low-dose gamma irradiation (50 and 100 kGy) on the mechanical, thermal, and mineralogical properties of cement and geopolymer mortars, with and without barite as a radiation-shielding additive. Mortars were evaluated through flexural and compressive strength testing, thermogravimetric analysis (TG/DSC), X-ray diffraction (XRD), mercury intrusion porosimetry (MIP), and scanning electron microscopy (SEM). Gamma irradiation enhanced flexural strength in cement mortars and had a stabilizing effect on geopolymer systems, with minimal impact on compressive strength across all formulations. XRD and TG/DSC analyses revealed radiation-induced carbonation in cement mortars, marked by increased formation of calcite, vaterite, and aragonite, and a corresponding decline in portlandite. In contrast, geopolymer mortars showed high phase stability, with only minor traces of nahcolite detected. These findings indicate that while cement-based mortars undergo measurable mineralogical changes under gamma exposure, geopolymer mortars, especially those based on fly ash, exhibit superior resistance and are better suited for use in radiation-exposed environments.

Anglický abstrakt

This study investigates the effects of low-dose gamma irradiation (50 and 100 kGy) on the mechanical, thermal, and mineralogical properties of cement and geopolymer mortars, with and without barite as a radiation-shielding additive. Mortars were evaluated through flexural and compressive strength testing, thermogravimetric analysis (TG/DSC), X-ray diffraction (XRD), mercury intrusion porosimetry (MIP), and scanning electron microscopy (SEM). Gamma irradiation enhanced flexural strength in cement mortars and had a stabilizing effect on geopolymer systems, with minimal impact on compressive strength across all formulations. XRD and TG/DSC analyses revealed radiation-induced carbonation in cement mortars, marked by increased formation of calcite, vaterite, and aragonite, and a corresponding decline in portlandite. In contrast, geopolymer mortars showed high phase stability, with only minor traces of nahcolite detected. These findings indicate that while cement-based mortars undergo measurable mineralogical changes under gamma exposure, geopolymer mortars, especially those based on fly ash, exhibit superior resistance and are better suited for use in radiation-exposed environments.

Klíčová slova

Geopolymer matrix; cement matrix; gamma irradiation; barite modification ; microstructure; mechanical properties

Klíčová slova v angličtině

Geopolymer matrix; cement matrix; gamma irradiation; barite modification ; microstructure; mechanical properties

Autoři

JÓŹWIAK-NIEDŹWIEDZKA, D.; ROVNANÍK, P.; GMÉLING, K.; HOMLOK, R.; DENIS, P.

Rok RIV

2026

Vydáno

01.01.2026

Periodikum

Journal of Nuclear Materials

Svazek

619

Číslo

1

Stát

Nizozemsko

Strany od

156246

Strany počet

10

URL

https://doi.org/10.1016/j.jnucmat.2025.156246

BibTex

@article{BUT199290,
  author="{} and Pavel {Rovnaník} and  {} and  {} and  {}",
  title="Effects of low-dose gamma irradiation on mechanical and microstructural properties of barite-modified geopolymer and cement mortars",
  journal="Journal of Nuclear Materials",
  year="2026",
  volume="619",
  number="1",
  pages="10",
  doi="10.1016/j.jnucmat.2025.156246",
  issn="0022-3115",
  url="https://doi.org/10.1016/j.jnucmat.2025.156246"
}