Experimental Investigation on Effect of Carbon Nanotubes and Carbon Fibres on the Behavior of Plain Cement Mortar Composite Round Bars under Direct Tension

This paper investigates the behavior of reinforced cement mortar composite round bars with multiwalled carbon nanotubes (MWCNTs) and carbon fibers (CFs). The percentage of CFs was fixed at 2.25 wt% of cement, while the percentage of MWCNTs was fixed at 0.5, by wt% of cement. Dispersion of both MWCNTs and CFs was carried out using ultrasonic energy method. Composite round bars were tested under direct tension in order to evaluate their mechanical properties such as ultimate load, deflection criteria, and stress-strain behavior. These results were then compared with the results of plain cement control round bars. From the study, it is shown that the load carrying capacity of composite bars under direct tension is substantially higher than the plain controlled bar.

[1]  Gerard T. Caneba,et al.  Novel Ultrasonic Dispersion of Carbon Nanotubes , 2010 .

[2]  Surendra P. Shah,et al.  Nanoscale Modification of Cementitious Materials , 2009 .

[3]  J. Luh,et al.  CARBON NANOTUBE/CEMENT COMPOSITES - EARLY RESULTS AND POTENTIAL APPLICATIONS , 2005 .

[4]  N. Banapurmath,et al.  Experimental investigation of the effect of carbon nanotubes and carbon fibres on the behaviour of plain cement composite beams , 2011 .

[5]  S. Gade.  CHARACTERIZATION OF THE MECHANICAL PROPERTIES OF CARBON NANOTUBE-BASED COMPOSITES USING THE FINITE ELEMENT METHOD , 2005 .

[6]  A. Chaipanich,et al.  Behavior of multi-walled carbon nanotubes on the porosity and microstructure of cement-based materials , 2011 .

[7]  G. Chan,et al.  Growth of Cement Hydration Products on Single‐Walled Carbon Nanotubes , 2009 .

[8]  James J. Beaudoin,et al.  Carbon Nanotubes and their Application in the Construction Industry , 2004 .

[9]  P. Mondal.  Nanomechanical properties of cementitious materials , 2008 .

[10]  Davide Zampini,et al.  Microfiber and Macrofiber Hybrid Fiber-Reinforced Concrete , 2005 .

[11]  Ashwani K. Rana,et al.  Significance of Nanotechnology in Construction Engineering , 2009 .

[12]  Surendra P. Shah,et al.  Carbon Nanotubes Reinforced Concrete , 2009, SP-267: Nanotechnology of Concrete: The Next Big Thing is Small.

[13]  P. K. Mehta,et al.  Concrete: Microstructure, Properties, and Materials , 2005 .

[14]  P. Bowen,et al.  Changes in portlandite morphology with solvent composition: Atomistic simulations and experiment , 2011 .

[15]  A. Keyvani.  Huge opportunities for industry of nanofibrous concrete technology , 2007 .

[16]  B. Andrawes,et al.  Finite element analysis of carbon nanotube/cement composite with degraded bond strength , 2010 .

[17]  Giuseppe Andrea Ferro,et al.  Influence of carbon nanotubes structure on the mechanical behavior of cement composites , 2009 .

[18]  Maria S. Konsta-Gdoutos,et al.  Mechanical Properties and Nanostructure of Cement-Based Materials Reinforced with Carbon Nanofibers and Polyvinyl Alcohol (PVA) Microfibers , 2010, SP-270: Advances in the Material Science of Concrete.