Effect of Multi-Walled Carbon Nanotubes on Strength and Electrical Properties of Cement Mortar
Construction, Infrastructure and Transportation Department, Universidad Politécnica de Madrid (UPM), Alfonso XII, 3, 28014 Madrid, Spain
*
Author to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Materials 2021, 14(1), 79; https://doi.org/10.3390/ma14010079
Received: 29 November 2020
/
Revised: 20 December 2020
/
Accepted: 22 December 2020
/
Published: 26 December 2020
(This article belongs to the Special Issue Research and Development of Modified Building Materials)
This work aims to investigate the effects of multi-walled carbon nanotubes (MWCNTs) on the strength and electrical properties of cement mortar. MWCNTs were added to cement mortar in four different concentrations: 0.00 wt.%, 0.01 wt.%, 0.015 wt.%, and 0.02 wt.% by the mass of cement. The consistency, density, setting time and compressive and flexural strength of mixes were tested and analyzed at 28 and 90 days curing time. Mechanical performance tests confirm an increase of 25% and 20% in the ultimate compressive and flexural strength respectively, which results from MWCNT 0.02 wt.% loading at 90 days curing time. The resistivity measurements in mortars with 0.01 and 0.015 wt.% MWCNT loading result up to 10% decrement at both 28 and 90 days curing. Activation energy calculations show fully accordance with these statements, resuming that 0.01 wt.% MWCNT appears to be the most effective loading scheme to produce certain conductivity enhancement in cement mortar.
View Full-Text
Keywords:
multi-walled carbon nanotubes; cement-based materials; flexural strength; compressive strength; electrical resistivity; activation energy
▼
Show Figures
Figure 1
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
MDPI and ACS Style
Cerro-Prada, E.; Pacheco-Torres, R.; Varela, F. Effect of Multi-Walled Carbon Nanotubes on Strength and Electrical Properties of Cement Mortar. Materials 2021, 14, 79. https://doi.org/10.3390/ma14010079
AMA Style
Cerro-Prada E, Pacheco-Torres R, Varela F. Effect of Multi-Walled Carbon Nanotubes on Strength and Electrical Properties of Cement Mortar. Materials. 2021; 14(1):79. https://doi.org/10.3390/ma14010079
Chicago/Turabian StyleCerro-Prada, Elena, Rosalía Pacheco-Torres, and Fernando Varela. 2021. "Effect of Multi-Walled Carbon Nanotubes on Strength and Electrical Properties of Cement Mortar" Materials 14, no. 1: 79. https://doi.org/10.3390/ma14010079
Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.
