Nanomechanical Performance of Interfacial Transition Zone in Fiber Reinforced Cement Matrix

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F18%3A00321135" target="_blank" >RIV/68407700:21110/18:00321135 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.4028/www.scientific.net/KEM.760.251" target="_blank" >http://dx.doi.org/10.4028/www.scientific.net/KEM.760.251</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4028/www.scientific.net/KEM.760.251" target="_blank" >10.4028/www.scientific.net/KEM.760.251</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Nanomechanical Performance of Interfacial Transition Zone in Fiber Reinforced Cement Matrix

Popis výsledku v původním jazyce

This paper shows a micromechanical study of interfacial transition zone (ITZ) around steel fiber in cement paste. It investigates microstructure and mechanical performance of the ITZ by a combination of nanoindentation and scanning electron microscopy (SEM). The investigated specimens were made from cement CEM I 42.5R paste with dispersed reinforcement in the form of steel fiber TriTreg 50 mm. The SEM demonstrated larger porosity and smaller portion of clinkers in the ITZ. Nanoindentation delivered values of elastic modulus, hardness and creep parameters around the fiber. An average value of elastic modulus in ITZ was at the level of 67% in comparison with cement bulk and the width of ITZ was about 40 μm. The value of hardness was found to be 60% of the average hardness of the bulk cement paste. The measured load-displacement curves were used for calculation of creep indentation parameter (CIT) and the creep compliance function. An average value of the creep compliance in the ITZ was found to be two times higher than in the cement bulk.

Název v anglickém jazyce

Nanomechanical Performance of Interfacial Transition Zone in Fiber Reinforced Cement Matrix

Popis výsledku anglicky

This paper shows a micromechanical study of interfacial transition zone (ITZ) around steel fiber in cement paste. It investigates microstructure and mechanical performance of the ITZ by a combination of nanoindentation and scanning electron microscopy (SEM). The investigated specimens were made from cement CEM I 42.5R paste with dispersed reinforcement in the form of steel fiber TriTreg 50 mm. The SEM demonstrated larger porosity and smaller portion of clinkers in the ITZ. Nanoindentation delivered values of elastic modulus, hardness and creep parameters around the fiber. An average value of elastic modulus in ITZ was at the level of 67% in comparison with cement bulk and the width of ITZ was about 40 μm. The value of hardness was found to be 60% of the average hardness of the bulk cement paste. The measured load-displacement curves were used for calculation of creep indentation parameter (CIT) and the creep compliance function. An average value of the creep compliance in the ITZ was found to be two times higher than in the cement bulk.

Druh

D - Stať ve sborníku

CEP obor

—

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

Special Concrete and Composites 2017

ISBN

978-3-0357-1240-7

ISSN

1013-9826

e-ISSN

1662-9795

Počet stran výsledku

6

Strana od-do

251-256

Název nakladatele

Transtech Publications

Místo vydání

Zürich

Místo konání akce

Skalský Dvůr

Datum konání akce

10. 10. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—