Linearity and assessment of micro-scale creep in C-S-H via nanoindentation

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F25%3A00386836" target="_blank" >RIV/68407700:21110/25:00386836 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.21012/FC12.1116" target="_blank" >https://doi.org/10.21012/FC12.1116</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.21012/FC12.1116" target="_blank" >10.21012/FC12.1116</a>

Result language
angličtina
Original language name
Linearity and assessment of micro-scale creep in C-S-H via nanoindentation
Original language description
This paper focuses on quantifying the micro-scale creep compliance of the C-S-H phase in well-hydrated, 1.5-year-old cement paste, measured using grid nanoindentation with a Berkovich tip. Four different load levels were tested to induce varying levels of deformation and stress. The results showed that the measured creep compliance is independent of the maximum vertical force within the range of 1 mN to 3 mN, standardly used in nanoindentation of cement pastes. The same trends and conclusions were observed for a reference polymeric material, PMMA, chosen for its homogeneity. In both cases, the creep falls in the linear viscoelastic regime. The linearity was further checked by calculation of the stress developed beneath the indentation tip. The stress was estimated using a finite element numerical model simulating the contact problem. The calculated stress reached 61.4% of the compressive strength measured by micro-pillar testing, 17.1%–46.1% of the strength measured by micro-beam testing, and 29.0% of the strenght estimated by the multiscale model.
Czech name
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Czech description
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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)

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Proceedings of the 12th International Conference on Fracture Mechanics for Concrete and Concrete Structures
ISBN
978-3-903039-01-8
ISSN
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e-ISSN
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Number of pages
8
Pages from-to
533-540
Publisher name
Technische Universität Wien
Place of publication
Vídeň
Event location
Vídeň
Event date
Apr 23, 2025
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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