CHARACTERIZATION OF OLD CONCRETE FOR NEW USE: GRID NANOINDENTATION AND SCANNING ELECTRON MICROSCOPY

1 PROŠEK Zdeněk
Co-authors:
2 TESÁREK Pavel 3 HRBEK Vladimír
Institutions:
1 Czech Technical University in Prague, Faculty of Civil Engineering, Prague, Czech Republic, EU, zdenek.prosek@fsv.cvut.cz
2 Czech Technical University in Prague, Faculty of Civil Engineering, Prague, Czech Republic, EU, pavel.tesarek@fsv.cvut.cz
3 Czech Technical University in Prague, Faculty of Civil Engineering, Prague, Czech Republic, EU, vladimir.hrbek@fsv.cvut.cz
Conference:
10th International Conference on Nanomaterials - Research & Application, Hotel Voronez I, Brno, Czech Republic, EU, October 17th - 19th 2018
Proceedings:
Proceedings 10th International Conference on Nanomaterials - Research & Application
Pages:
736-741
ISBN:
978-80-87294-89-5
ISSN:
2694-930X
Published:
28th February 2019
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
34 views / 10 downloads
Abstract

Concrete waste after further processing can be used in the form of a micronized powder in which the non-hydrated portions are reactivated. For this purpose, nanoindentation and scanning electron microscopy with X-ray spectroscopy (SEM-EDS) are combined to determine properties of the concrete sample. The approximate composition of old concrete is calculated from SEM BSE image analysis. The nanoindentation technique over two main material levels enabled evaluation of the indentation modulus of these phases due to the spectral deconvolution of measured data. All these techniques serve for determining the activity of old concrete and characterization shape and textures of activation micronized old concrete powder.

Keywords: Old concrete, nanoindentation, SEM analysis, micronized powder
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