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

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F26%3A0199290" target="_blank" >RIV/00216305:26110/26:0199290 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1016/j.jnucmat.2025.156246" target="_blank" >https://doi.org/10.1016/j.jnucmat.2025.156246</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jnucmat.2025.156246" target="_blank" >10.1016/j.jnucmat.2025.156246</a>

Result language
angličtina
Original language name
Effects of low-dose gamma irradiation on mechanical and microstructural properties of barite-modified geopolymer and cement mortars
Original language description
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.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20101 - Civil engineering

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2026
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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