Evaluation of the Influence of Carbon Nanotube on Rheological Behavior of Asphalt Binder
Authors
1 Assistant Professor, Department of Civil Engineering, University of Science and Technology of Mazandaran, Behshahr, Iran.
2 B.Sc., Student, Department of Civil Engineering, University of Science and Technology of Mazandaran, Behshahr, Iran.
Abstract
In recent years, various nanometer materials have been used in many scientific and engineering fields. Because of their small size and large surface area, Nanomaterials provide improved structural properties over their larger, micro-sized counterparts. Nanomaterials have unique properties that make them suitable as additives in asphalt mixtures. This study describes the importance of Nanomaterials with an emphasis on the use of carbon nanotubes as an asphalt modifier. Different methods for the synthesis of carbon nanotubes such as arc discharge, laser irradiation and chemical vapor deposition (CVD) are described and different types of techniques used to disperse carbon nanotubes in bitumen are described. The results of typical tests such as penetration degree, softening point, flexibility and necessity in order to determine the mechanical performance of the material modified with carbon nanotubes are also summarized in this work. The effect of carbon nanotube modifications on bitumen rheological properties is also described. A systematic review of experimental studies on bitumen modification using carbon nanotubes has been carried out. The addition of carbon nanotubes improves the hardness of bitumen, which increases its wear resistance. Various parameters/variables such as bitumen type, mixing technique, mixer type, carbon nanotube properties and mixing time play key roles in the modification of bitumen with carbon nanotubes and significantly affect the performance of the final bitumen.
Keywords
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