NANOINDENTATION ASSISTED SMALL SCALE TENSILE PROPERTIES OF HYDRATED CEMENT AND AAFA PASTES

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F19%3A00344463" target="_blank" >RIV/68407700:21110/19:00344463 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
NANOINDENTATION ASSISTED SMALL SCALE TENSILE PROPERTIES OF HYDRATED CEMENT AND AAFA PASTES
Original language description
Nanoindentation is a well established experimental method used for characterization of small scale material properties. Here, nanoindentation is employed as a precise loading tool on samples prepared with Focused Ion Beam (FIB) milling technique. Micrometer sized beam specimens were prepared. Subsequently, they were bent with the aid nanoindenter and fracture characteristics acquired. Evaluation is performed for elastic properties, tensile strength and fracture energy of individual small scale microstructural constituents of cement paste like C-S-H rich phases and CH and N-A-S-H gels in alkali-activated fly ash (AAFA). Very high tensile strengths at the micrometer scale were observed for cement paste hydration products (200-700 MPa) as well as for N-A-S-H gel (340 MPa). The results are consistent with atomistic simulations and multi-scale modeling from available literature. The scaling factor of the tensile properties is caused by the multi-level character of the studied composites that consist of multiple defects in the form of pores, cracks and crystalline inclusions at higher (meso- and macro-) levels and that are not present at the micrometer scale.
Czech name
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Czech description
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Project
<a href="/en/project/GA17-05360S" target="_blank" >GA17-05360S: Small-scale fracturing of amorphous and crystalline materials assessed with nanoindentation and focused ion beam</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Proceedings of the International Conference on Sustainable Materials, Systems and Structures (SMSS2019) Durability, Monitoring and Repair of Structures
ISBN
978-2-35158-217-6
ISSN
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e-ISSN
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Number of pages
6
Pages from-to
218-223
Publisher name
Rilem Publications s.a.r.l.
Place of publication
Bagneux
Event location
Rovinj
Event date
Mar 20, 2019
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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