Fracture Process in a Fine-Grained Cement-Based Composite Monitored with Nanoindentation and Acoustic Emission

Jiří Němeček; Zbyněk Keršner; Pavel Schmid; Ivana Havlíková; Hana Šimonová; Libor Topolář; Václav Veselý; Pavel Rovnaník

doi:10.4028/www.scientific.net/KEM.662.47

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 662Fracture Process in a Fine-Grained Cement-Based...

Fracture Process in a Fine-Grained Cement-Based Composite Monitored with Nanoindentation and Acoustic Emission

Abstract:

The contribution is devoted to investigation of the fracture process zone (FPZ) in a fine-grained cement-based composite made from hydrated Portland cement. Particularly, experimental investigations and description of the stable crack propagation using fracture mechanics model are conducted. Three-point bending tests on small composite beams with a central edge notch were performed. The damage due to fracture was monitored by means of nanoindentation performed around the macroscopically observable crack. Acoustic emission events were recorded during the three-point bending test and correlated with load–displacement data. The beneficial effect on the fracture resistance of fine-grained mortar specimens compared to plain cement pastes was quantified.

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Periodical:

Key Engineering Materials (Volume 662)

Pages:

47-50

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.662.47

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Online since:

September 2015

Authors:

Jiří Němeček*, Zbyněk Keršner, Pavel Schmid, Ivana Havlíková, Hana Šimonová, Libor Topolář, Václav Veselý, Pavel Rovnaník

Keywords:

Acoustic Emission, Cementitious Composite, Fracture Process Zone, Nanoindentation

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