Abstract
In this work, several nanomaterials have been used in cementitious matrices: carbon nanofilaments (either multiwall nanotubes or nanofibers), nanosilica and nanoclays. The physico-chemical behavior of these nanomaterials at three different levels has been analyzed: cement paste, mortar and concrete. It has been determined the setting times, the workability, the mineralogical structure and the dispersion of the nanomaterials in the cement matrix by ESEM/EDX , the percentage of hydration by TGA and the mechanical properties of mortar and concrete at 3, 7, 28 and 56 days. It has been found that almost all the nanomaterials used in this study accelerate the hydration process (with a proper dispersion), obtaining reinforcements in compression and flexural strength at 3 and 7 days (between 20 and 40 %). At 28 days, it has been observed that carbon nanotubes and nanofibers exhibit a reinforcement in the flexural strength (more than 25%), due to their fibrilar structure. Reinforcements, either in compression or flexural strength, have been reached with nanosilica (between 20 and 40 %); indeed, pozzolanic activity has been confirmed with nanosilica.
Keywords
- Compressive Strength
- Flexural Strength
- Silica Fume
- Cement Paste
- Carbon Nanofibers
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Vera-Agullo, J. et al. (2009). Mortar and Concrete Reinforced with Nanomaterials. In: Bittnar, Z., Bartos, P.J.M., Němeček, J., Šmilauer, V., Zeman, J. (eds) Nanotechnology in Construction 3. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-00980-8_52
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DOI: https://doi.org/10.1007/978-3-642-00980-8_52
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-00979-2
Online ISBN: 978-3-642-00980-8
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