Evaluating the Properties of Bitumen Stabilized with Carbon Nanotubes

Abstract:

The aim of this paper is to investigate the rheological properties of Multi-Walled Carbon NanoTube (MWCNT) enhanced bitumen. The rheological properties of bitumen samples with a range of MWCNT applications are evaluated. The shear complex modulus of the samples increased after ageing, and also increased as the percentage of MWCNTs increased. The viscous component of the complex shear modulus was found to be dominant at higher temperatures, but as the concentration of MWCNTs increased, it was found that the elastic portion started to dominate at higher temperatures. At higher temperatures a change in the phase angle was found, with increased concentrations of MWCNTs causing a decrease in δ, representing a more plastic sample. It is shown that addition of MWCNTs as a modifier did not increase the cracking resistance of the bitumen. Thus, if fatigue cracking is of concern in a certain area it is not recommended to use MWCNTs as a modifier. As the quantity of MWCNTs increased, the temperature at which rutting would start to occur, increased.

• Periodical: Advanced Materials Research (Volume 723)
• Pages: 312-319
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.723.312
• Online since: August 2013
• Authors: Wynand JvdM Steyn, Tanya E. Bosman, Samantha Galle, Jacques van Heerden
• Keywords: Bitumen, Carbon Nanotube (CN), Complex Shear Modulus, Modification

References

[1] Harris, P. Carbon nanotube science and technology. http://www.personal.reading.ac.uk/ ~scsharip/tubes.htm. Last accessed 10th February 2012. 2010.

[2] Steyn, W.J.vdM. Application of nanotechnology in road pavement engineering. Nanotechnology in civil infrastructure: A paradigm shift. Ed N Attoh-Okine. Springer Verlag Berlin Heidelberg, pp.49-83. 2011.

DOI: 10.1007/978-3-642-16657-0_2

[3] Barth, E. Asphalt. New York: Gordon and Breach Science Publishers. 1962.

[4] Distin et al. (2007). Bituminous binders for road construction and maintenance. Sabita. Manual 2. Cape Town.

[5] Pavement Interactive. Dynamic Shear Rheometer. http://pavementinteractive.org/ index.php?title=DSR. Last accessed 1st March 2012. 2011.

[6] The Asphalt Handbook. Seventh edition. Asphalt Institute. USA. 2007.

[7] Gogotsi, Y. ed. Carbon nanomaterials. Boca Raton: Taylor and Francis group. 2006.

[8] Hornyak, G.L., Tibbals, H.F., Dutta, J. and Moore, J.J. Introduction to Nanoscience and Nanotechnology. Boca Raton: Taylor and Francis group. 2009.

[9] Kasaliwal, G.R., Pegel, S., Göldel, A., Pötschke, P. and Heinrich, G. Analysis of agglomerate dispersion mechanisms of multiwalled carbon nanotubes during melt mixing in polycarbonate. Polymer, Vol 51, pp.2708-2720. 2010.

DOI: 10.1016/j.polymer.2010.02.048

[10] Nanocyl: The carbon nanotube specialist. Carbon nanotubes. http://www.nanocyl.com/CNT- Expertise-Centre/Carbon-Nanotubes. Last accessed 1st March 2012. 2009.

[11] Galle, S. The modification of neat bitumen through the incorporation of carbon nanotubes. BEng (Civil) dissertation. University of Pretoria, Pretoria, South Africa. 2010.