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Quasi-brittle behavior of cementitious matrix composites

Ostertag, C.P. / Yi, ChongKu

Observations on crack interactions with bridging sites during in situ crack propagation in steel microfiber reinforced cementitious composites are presented. The loading fixture used for identifying the toughening mechanisms is briefly described. The loading fixture can be placed under an optical microscope, inside a Scanning Electron Microscope (SEM) or inside the Environmental Electron Microscope (ESEM). Controlled displacements are applied to compact tension specimens through a piezoelectric translator which is driven by a high voltage amplifier. The in situ crack propagation measurements reveal energy absorbing mechanisms in the vicinity of fiber and aggregate bridging sites which are contributing to the strength and toughness enhancement observed in these composites.

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Quasi-brittle behavior of cementitious matrix composites

Ostertag, C.P. / Yi, ChongKu

Observations on crack interactions with bridging sites during in situ crack propagation in steel microfiber reinforced cementitious composites are presented. The loading fixture used for identifying the toughening mechanisms is briefly described. The loading fixture can be placed under an optical microscope, inside a Scanning Electron Microscope (SEM) or inside the Environmental Electron Microscope (ESEM). Controlled displacements are applied to compact tension specimens through a piezoelectric translator which is driven by a high voltage amplifier. The in situ crack propagation measurements reveal energy absorbing mechanisms in the vicinity of fiber and aggregate bridging sites which are contributing to the strength and toughness enhancement observed in these composites.

Quasi-brittle behavior of cementitious matrix composites

Ostertag, C.P. / Yi, ChongKu

Observations on crack interactions with bridging sites during in situ crack propagation in steel microfiber reinforced cementitious composites are presented. The loading fixture used for identifying the toughening mechanisms is briefly described. The loading fixture can be placed under an optical microscope, inside a Scanning Electron Microscope (SEM) or inside the Environmental Electron Microscope (ESEM). Controlled displacements are applied to compact tension specimens through a piezoelectric translator which is driven by a high voltage amplifier. The in situ crack propagation measurements reveal energy absorbing mechanisms in the vicinity of fiber and aggregate bridging sites which are contributing to the strength and toughness enhancement observed in these composites.

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Title:

Quasi-brittle behavior of cementitious matrix composites

Contributors:

Ostertag, C.P. (author) / Yi, ChongKu (author)

Published in:

Materials Science and Engineering, Part A (Structural Materials: Properties, Microstructure and Processing) ; 278 ; 88-95

Publication date:

2000

Size:

8 Seiten, 14 Quellen

ISSN:

DOI:

https://doi.org/10.1016/S0921-5093(99)00588-2

Type of media:

Article (Journal)

Type of material:

Print

Language:

English

Keywords:

Reibung , Rissausbreitung , Stahlfaser , Zähfestigkeit , optische Mikroskopie , Rasterelektronenmikroskopie , Energieabsorption , Sprödigkeit , faserverstärkter Werkstoff

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