Nanomechanical analysis of Gamma-irradiated cement paste exposed to different humidities
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F23%3AN0000025" target="_blank" >RIV/26722445:_____/23:N0000025 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21110/23:00367154
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0950061823016835" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0950061823016835</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.conbuildmat.2023.131969" target="_blank" >10.1016/j.conbuildmat.2023.131969</a>
Alternative languages
Result language
angličtina
Original language name
Nanomechanical analysis of Gamma-irradiated cement paste exposed to different humidities
Original language description
The paper characterizes concurrent effects of gamma-irradiation and presence of water in Portland cement pastes. An extensive nanomechanical quantification (Young's modulus, hardness, and creep compliance) at two scales is performed after exposure to two gamma-ray doses and a wide range of relative humidities (RH 0%-100%). Competing microstructural mechanisms such as water radiolysis, hydration, carbonation and drying were identified and their effects de-coupled with the aid of nanoindentation and other supporting techniques. Maximum radiation resistance was found for samples in medium humidities (33%-57%). Samples irradiated below 11% RH exhibited compaction of C-S-H phases at the level of 100 nm, & SIM; 25% increase of Young's modulus and decrease of creep compliance due to water radiolysis and drying. The compaction resulted in microcracking at higher paste scale and caused & SIM; 17% decrease of elastic modulus. Samples irradiated in water showed large (& SIM; 26%) decrease of Young's modulus and increased creep compliance accompanied by 9%-10% Portlandite loss.
Czech name
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Czech description
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Classification
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
20501 - Materials engineering
Result continuities
Project
<a href="/en/project/GA23-05435S" target="_blank" >GA23-05435S: Nanomechanical performance of cementitious composites under radiation impact and variable environmental actions</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Construction and Building Materials
ISSN
0950-0618
e-ISSN
1879-0526
Volume of the periodical
393
Issue of the periodical within the volume
August
Country of publishing house
GB - UNITED KINGDOM
Number of pages
16
Pages from-to
1-16
UT code for WoS article
001024753300001
EID of the result in the Scopus database
2-s2.0-85161629740