Investigating the influence of carbon nanotube on the performance of asphalt binder

Abstract

The purpose of this study aims at investigating the impact of multi-walled carbon nanotubes (MWCNT’s) on the properties of low viscosity grade asphalt binder. Asphalt binder with viscosity grade-10 is selected as the control binder and later it is modified with different percentages of MWCNT’s (0.5–2.5%). Penetration, softening point, ductility and rotational viscosity test were employed for evaluating the effect of MWCNT’s on basic physical properties of modified asphalt binder. Dynamic Shear Rheometer (DSR) is used for evaluating the rheological properties of the base and modified bitumen, for both aged and unaged bitumen. Based on the conventional and basic rheological tests, it was seen that the addition of MWCNT’s improved the high-temperature performance of modified bitumen. Multiple Stress Creep and Recovery (MSCR) test results revealed that the addition of MWCNT’s improved the creep and recovery of modified binders for both stress intensities (0.1 kPa and 3.2 kPa) which confirms that the modified binder is more rut resistant. Moreover, it was observed that there was a significant improvement in the aging resistance of the asphalt binder due to addition of MWCNTs. However low temperature performance of MWCNTs was not encouraging. Also, MWCNTs addition to asphalt binder was found to be stable under high-temperature storage condition. Overall, there is a significant amount of improvement using MWCNTs in the base asphalt binder.

Adhesion Properties of Recycled High-Viscosity Asphalt–Aggregate Interface under Dynamic Water Erosion

“…In order to ensure the application effect of drainage asphalt pavement, researchers have developed different types of phase change materials to improve the high-temperature stability of the mixture on the one hand and used a high-viscosity asphalt binder to improve the overall road performance of the mixture on the other hand [ 1 , 2 , 3 , 4 , 5 , 6 ]. Generally speaking, improving asphalt viscosity can be realized by adding modifiers, among which Tafpack Super(TPS) high-viscosity-modified asphalt has been widely used because of its excellent high-temperature stability, low-temperature crack resistance, strong cohesion, and durability [ 7 ].…”

Continuous wave THz imaging of multi-walled carbon nanotubes polymer composites

“…MWCNTs-based composites have unique mechanical properties [3], such as high strength and rigidity and a huge aspect ratio (the ratio of length to diameter) [4]. These properties are used in micro-and nanoelectronics as dielectrics, sensors [5]; in the chemical industry as heterodyne catalysts of chemical processes [6]; in the light industryas heavy-duty filaments [7], components of bitumen (asphalt) [8]. These unique properties are achieved by the homogeneous allocation of MWCNTs in the composite and depend on the manufacturing technology.…”