Fracture Properties of Cement Studied by Nanoindentation and FIB

Abstract:

The paper shows results of microscale experimental tests performed on cement paste specimens fabricated by focused ion beam milling. The specimens are prepared in the form of cantilever beams and loaded in bending by nanoindenter. The dimensions of specimens are in the order of a few micrometers which corresponds to the single phase size. Intact and notched specimens with a stress concentrator are tested. Tensile strength and fracture energy are derived for the hydration product by analyzing the nanoindentation data and with the aid of analytical and numerical modeling. Although small number of tests is performed good correlation of the results is reached with respect to the available literature and molecular dynamic simulations.

• Periodical: Key Engineering Materials (Volume 784)
• Pages: 3-8
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.784.3
• Online since: October 2018
• Authors: Jiří Němeček*, Jiří Němeček, Jan Maňák
• Keywords: Cement, Focused Ion Beam, Fracture Energy, Nanoindentation, Tensile Strength

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