Nanomechanical testing of gamma-irradiated building composites

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F25%3AN0000076" target="_blank" >RIV/26722445:_____/25:N0000076 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21110/25:00385892

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S2452321625000046" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2452321625000046</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.prostr.2025.06.003" target="_blank" >10.1016/j.prostr.2025.06.003</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Nanomechanical testing of gamma-irradiated building composites

Popis výsledku v původním jazyce

Nuclear power plants worldwide are aging and will soon reach the end of their designated lifetimes. Consequently, extending their safe operation to 80 years has become the focus of extensive research. The effects of irradiation on concrete are multiscale but have primarily been studied using macroscopic samples, where a decrease in mechanical properties has been reported. This study focuses on the micro-scale effects of gamma irradiation on cement paste exposed to a wide range of relative humidities (0%–100%). Nanoindentation was employed as the main tool to quantify micro-mechanical parameters, such as Young’s modulus and hardness. A significant increase in Young’s modulus (∼25%) was found at relative humidities below 11%, attributed to the combined effects of water radiolysis and drying. In contrast, a decrease in Young’s modulus (∼26%) was observed in samples irradiated in water. Samples irradiated at medium humidities (33%–76%) showed negligible damage due to the irradiation.

Název v anglickém jazyce

Nanomechanical testing of gamma-irradiated building composites

Popis výsledku anglicky

Nuclear power plants worldwide are aging and will soon reach the end of their designated lifetimes. Consequently, extending their safe operation to 80 years has become the focus of extensive research. The effects of irradiation on concrete are multiscale but have primarily been studied using macroscopic samples, where a decrease in mechanical properties has been reported. This study focuses on the micro-scale effects of gamma irradiation on cement paste exposed to a wide range of relative humidities (0%–100%). Nanoindentation was employed as the main tool to quantify micro-mechanical parameters, such as Young’s modulus and hardness. A significant increase in Young’s modulus (∼25%) was found at relative humidities below 11%, attributed to the combined effects of water radiolysis and drying. In contrast, a decrease in Young’s modulus (∼26%) was observed in samples irradiated in water. Samples irradiated at medium humidities (33%–76%) showed negligible damage due to the irradiation.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GA23-05435S" target="_blank" >GA23-05435S: Účinky radiačního působení na nanomechanické vlastnosti cementových kompozitů v proměnných podmínkách prostředí</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Procedia Structural Integrity, vol 67

ISBN

—

ISSN

2452-3216

e-ISSN

—

Počet stran výsledku

6

Strana od-do

17-22

Název nakladatele

—

Místo vydání

—

Místo konání akce

Catania, Italy

Datum konání akce

8. 7. 2025

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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