Evolution of micro-mechanical properties of cement and fly-ash composite measured by nanoindentation over one year period

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F18%3A00323480" target="_blank" >RIV/68407700:21110/18:00323480 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Evolution of micro-mechanical properties of cement and fly-ash composite measured by nanoindentation over one year period

Popis výsledku v původním jazyce

This study shows an application of nanoindentation in characterization of micro-mechanical response of two cementitious composites at the age of 28 days and 1-year. Pure Portland cement and Portland cement with 50 vol.% fly-ash replacement pastes were studied. Grid nanoindentation, statistical deconvolution and scanning electron microscopy were used for characterization of their main hydration products at microscale. About 700 indents were performed on each sample. Similar mechanical response was found for 28 days on both composites while a progress in reaction and mechanical maturing was found for one year old samples. Additional stiffening was produced by delayed reaction of fly-ash in the composite leading to higher elastic modulus for the main reaction phase.

Název v anglickém jazyce

Evolution of micro-mechanical properties of cement and fly-ash composite measured by nanoindentation over one year period

Popis výsledku anglicky

This study shows an application of nanoindentation in characterization of micro-mechanical response of two cementitious composites at the age of 28 days and 1-year. Pure Portland cement and Portland cement with 50 vol.% fly-ash replacement pastes were studied. Grid nanoindentation, statistical deconvolution and scanning electron microscopy were used for characterization of their main hydration products at microscale. About 700 indents were performed on each sample. Similar mechanical response was found for 28 days on both composites while a progress in reaction and mechanical maturing was found for one year old samples. Additional stiffening was produced by delayed reaction of fly-ash in the composite leading to higher elastic modulus for the main reaction phase.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA17-05360S" target="_blank" >GA17-05360S: Lomové vlastnosti amorfních a krystalických materiálů stanovené pomocí nanoindentace a fokusovaného iontového svazku v malém měřítku</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the 12th International fib PhD Symposium in Civil Engineering

ISBN

978-80-01-06401-6

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

117-122

Název nakladatele

ČVUT v Praze, Fakulta stavební

Místo vydání

Praha

Místo konání akce

Praha

Datum konání akce

29. 8. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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