Influence of Interfacial Transition Zone on Local and Overall Fracture Response of Cementitious Composites

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F18%3A00325898" target="_blank" >RIV/68407700:21110/18:00325898 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26110/18:PU129308

Výsledek na webu

<a href="http://dx.doi.org/10.4028/www.scientific.net/KEM.784.97" target="_blank" >http://dx.doi.org/10.4028/www.scientific.net/KEM.784.97</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4028/www.scientific.net/KEM.784.97" target="_blank" >10.4028/www.scientific.net/KEM.784.97</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of Interfacial Transition Zone on Local and Overall Fracture Response of Cementitious Composites

Popis výsledku v původním jazyce

Local mechanical properties of interfacial transition zone (ITZ) of fine-grained composite based on cement matrix with different types – basalt, granite, marble and amphibolite – of rock inclusions were studied. Specimens with the initial stress concentrator were tested in standard three-point bending configuration. Fracture surfaces were examined with light and electron microscopes. Local ITZ response was characterized by nanoindentation in the vicinity of rock inclusions. Local elasticity, hardness and viscous properties were assessed. It has been shown that the ITZ is mechanically weaker compared to the bulk matrix in the region of ca. 0–20 μm from the inclusion for all specimen’s types. It exhibits gradual increase of Young's modulus and hardness, which can be approximately expressed by a power law. On the other hand, the creep in ITZ was found to be higher compared to the bulk matrix. The results of nanoindentation measurements are in a good agreement with overall mechanical properties, fracture response and microstructure measurements done by scanning electron microscopy.

Název v anglickém jazyce

Influence of Interfacial Transition Zone on Local and Overall Fracture Response of Cementitious Composites

Popis výsledku anglicky

Local mechanical properties of interfacial transition zone (ITZ) of fine-grained composite based on cement matrix with different types – basalt, granite, marble and amphibolite – of rock inclusions were studied. Specimens with the initial stress concentrator were tested in standard three-point bending configuration. Fracture surfaces were examined with light and electron microscopes. Local ITZ response was characterized by nanoindentation in the vicinity of rock inclusions. Local elasticity, hardness and viscous properties were assessed. It has been shown that the ITZ is mechanically weaker compared to the bulk matrix in the region of ca. 0–20 μm from the inclusion for all specimen’s types. It exhibits gradual increase of Young's modulus and hardness, which can be approximately expressed by a power law. On the other hand, the creep in ITZ was found to be higher compared to the bulk matrix. The results of nanoindentation measurements are in a good agreement with overall mechanical properties, fracture response and microstructure measurements done by scanning electron microscopy.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název statě ve sborníku

Local Mechanical Properties XIII

ISBN

978-3-0357-1242-1

ISSN

1662-9795

e-ISSN

—

Počet stran výsledku

6

Strana od-do

97-102

Název nakladatele

Trans Tech Publications

Místo vydání

Curich

Místo konání akce

Košice

Datum konání akce

6. 11. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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