M Faramarzi - M. Sc. student, Department of civil engineering, University of Guilan, I. R. Iran
M Arabani - Professor, Department of civil engineering, University of Guilan, I. R. Iran
A.K Haghi - Professor, Department of textile engineering, University of Guilan, I. R. Iran
V Motaghitalab - Assistant professor, Department of textile engineering, University of Guilan, I. R. Iran

Asphalt pavement is considered as the national capital and every year, much of the country’s development budget is spent on road maintenance and improvement of the engineering characteristics of pavements. Therefore, new plans must be used to improve quality and to increase productivity and durability of conventional asphalt pavements. In this investigation, it has been attempted to promote technical characteristics of asphalt mixture using carbon nanotubes as an additive material for bitumen. So far, there has been little discussion about carbon fibber modified asphalt concrete but dimension of discussed fibbers have been in range of micro not nano. In this article, marshal test parameters of hot mix asphalt, modified with carbon nanotubes, are investigated and compared to conventional asphalt mix. Wet and dry process methods are most practical ways of mixing CNF in AC. It was decided that the best method to adopt for this investigation was dry process. In this study marshal test parameters of modified asphalt by 0.1, 0.5, and 1% carbon nanotube content in bitumen was evaluated considering marshal test, then results were compared to conventional asphalt mix. Obtained results shown, using carbon nanotube improves hot mix asphalt marshal stability and decreases marshal flow.

hot mix asphalt, carbon nanotubes, additive, marshal test