Publication detail

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

ZACHARDA, V. NĚMEČEK, J. ŠIMONOVÁ, H. KUCHARCZYKOVÁ, B. VYHLÍDAL, M. KERŠNER, Z.

Original Title

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

Type

conference paper

Language

English

Original Abstract

Mechanical fracture properties of interfacial transition zone (ITZ) of fine-grained composite based on cement matrix with different types – basalt, granite, marble and amphibolite – of rock inclusion 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 m from the inclusion for all specimen’s types. It exhibits gradual increase of elastic 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.

Keywords

fine-grained cement-based composite, rock inclusion, interfacial transition zone, nanoindentation, microstructure

Authors

ZACHARDA, V.; NĚMEČEK, J.; ŠIMONOVÁ, H.; KUCHARCZYKOVÁ, B.; VYHLÍDAL, M.; KERŠNER, Z.

Released

29. 10. 2018

Publisher

Trans Tech Publications

Location

Switzerland

ISBN

978-3-0357-1242-1

Book

Key Engineering Materials: Local Mechanical Properties XIII

ISBN

1013-9826

Periodical

Key Engineering Materials (print)

Year of study

784

State

Swiss Confederation

Pages from

97

Pages to

102

Pages count

6

BibTex

@inproceedings{BUT150523,
  author="Vojtěch {Zacharda} and Jiří {Němeček} and Hana {Šimonová} and Barbara {Kucharczyková} and Michal {Vyhlídal} and Zbyněk {Keršner}",
  title="Influence of Interfacial Transition Zone on Local and Overall Fracture Response of Cementitious Composites",
  booktitle="Key Engineering Materials: Local Mechanical Properties XIII",
  year="2018",
  journal="Key Engineering Materials (print)",
  volume="784",
  pages="97--102",
  publisher="Trans Tech Publications",
  address="Switzerland",
  doi="10.4028/www.scientific.net/KEM.784.97",
  isbn="978-3-0357-1242-1",
  issn="1013-9826"
}