Compressive Strength and Microstructure of Multi-Wall Carbon Nanotubes Reinforced Cement Composites

Abstract:

Advancement in the study of carbon nanotube has enabled its application in civil engineering as constitutive materials or additives. In this study, the availability of applying multi-walled carbon nanotube to improve the characteristics of cement composites was investigated with experiments on more than 30 specimens. The multi-walled carbon nanotubes (MWCNTs) were effectively dispersed in the water with surfactant, which can keep stable for over 3 months. Specimens with MWCNTs of 0.025%, 0.05% and 0.1% of cement (by weight) were tested with a loading machine and then analyzed with a SEM. It was found that the compressive strength of the samples increased with the increasing MWCNTs, it can improve the 7-day compressive strength by 22% . Microscopic analysis (SEM) revealed that carbon nanotubes were surrounded with hydration products. The bridging and debonding of carbon nanotubes in cement pastes was observed as well.

• Periodical: Advanced Materials Research (Volumes 450-451)
• Pages: 594-599
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.450-451.594
• Online since: January 2012
• Authors: Jin Tao Liu, Dong Ming Yan, Shi Lang Xu
• Keywords: Cement Composite, Mechanical Strength, Microstructure, Multi-Walled Carbon Nanotube (MWCNT)

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