Gamma radiation attenuation, mechanical properties and microstructure of barite-modified cement and geopolymer mortars
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Date
2024-10-30
Authors
Jóźwiak-Niedźwiedska, Daria
Rovnaník, Pavel
Dabrowski, Mariusz
Ośko, Jakub
Kuć, Michal
Maciak, Maciej
ORCID
0000-0001-8404-6505Advisor
Referee
Mark
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
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Abstract
The present study contributes to the development of alternative materials for radiation shielding, focusing on environmental sustainability and material cost efficiency. The primary aim was to evaluate the compressive and flexural strength, mineral composition, microstructure, and gamma-ray attenuation properties of cement mortars and geopolymer mortars containing barite powder. Mortars based on ordinary Portland cement (OPC) and fly ash geopolymers with varying amounts of barite powder were assessed for their shielding properties at energy levels associated with the decay of 137Cs. From the results, key parameters such as the linear attenuation coefficient (µ), mass attenuation coefficient (µm), half-value layer (HVL), and tenth-value layer (TVL) were determined. The results showed that while cement based composites exhibited superior gamma radiation attenuation compared to fly ash geopolymer mortars, the latter had higher mass attenuation efficiency, meaning less material density was required for the same level of shielding. Additionally, cement mortars had 23–25% highermechanical strength thangeopolymermortars. Importantly, the inclusionof barite powder improved the radiation shielding performance of both materials by 7–10%, demonstrating itseffectiveness in enhancing the protective properties of these mortars. This research highlights the potential of fly ash geopolymer mortars as viable, eco-friendly alternatives to traditional cement mortars in radiation shielding applications.
Description
Citation
NUCL ENG TECHNOL. 2024, vol. 57, issue 4, 11 p.
https://www.sciencedirect.com/science/article/pii/S173857332400545X
https://www.sciencedirect.com/science/article/pii/S173857332400545X
Document type
Peer-reviewed
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Published version
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Language of document
en