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Journal of Nanomaterials
Volume 2016 (2016), Article ID 1421959, 10 pages
http://dx.doi.org/10.1155/2016/1421959
Research Article

Potential of Carbon Nanotube Reinforced Cement Composites as Concrete Repair Material

1Department of CE, BUET, Dhaka 1000, Bangladesh
2Department of CE, University of Texas at Arlington, Arlington, TX 76019, USA

Received 16 December 2015; Revised 7 February 2016; Accepted 8 February 2016

Academic Editor: Brigitte Vigolo

Copyright © 2016 Tanvir Manzur et al. 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.

Abstract

Carbon nanotubes (CNTs) are a virtually ideal reinforcing agent due to extremely high aspect ratios and ultra high strengths. It is evident from contemporary research that utilization of CNT in producing new cement-based composite materials has a great potential. Consequently, possible practical application of CNT reinforced cementitious composites has immense prospect in the field of applied nanotechnology within construction industry. Several repair, retrofit, and strengthening techniques are currently available to enhance the integrity and durability of concrete structures with cracks and spalling, but applicability and/or reliability is/are often limited. Therefore, there is always a need for innovative high performing concrete repair materials with good mechanical, rheological, and durability properties. Considering the mechanical properties of carbon nanotubes (CNTs) and the test results of CNT reinforced cement composites, it is apparent that such composites could be used conveniently as concrete repair material. With this end in view, the applicability of multiwalled carbon nanotube (MWNT) reinforced cement composites as concrete repair material has been evaluated in this study in terms of setting time, bleeding, and bonding strength (slant shear) tests. It has been found that MWNT reinforced cement mortar has good prospective as concrete repair material since such composites exhibited desirable behavior in setting time, bleeding, and slant shear.