Performance Evaluation of Bitumen and Asphalt Mixture Modified with Carbon Nanotube

Authors
Hamin Chobdar 1
Alireza Ameli 2
1 Department of Civil Engineering, Malard Branch Islamic Azad University, Malard, Tehran, Iran.
2 Department of Civil Engineering, Malard Branch, Islamic Azad University, Malard, Tehran, Iran.
10.22034/road.2024.203828
Abstract
The aim of this paper was to investigate the effect of carbon nanotubes (1CNTs) as a bitumen modifier on the rutting and cracking performance of asphalt mixtures. For this purpose, different percentages of CNT (0.05, 0.1, 0.15, 0.2 and 0.25% by weight) were added to normal bitumen. Marshall Stability tests 2 (MS), indirect tension (IDT 3), static modulus (SM 4), wheel groove 5 (WT) and semicircular bending test (SCB) 6 were performed to evaluate the performance of asphalt mixture modified with CNT. . The results showed that the addition of carbon nanotubes significantly increased the rutting resistance at high temperature and the cracking resistance at medium temperature. In addition, it was found from the SCB test that the strain energy release rate (Jc) of 0.1% CNTs was 16% higher than that of the control mixture. Finally, based on the laboratory test results, it can be concluded that the optimal CNT percentage of 0.1% of bitumen weight can be used as an additive for bitumen in asphalt mixtures.
Keywords
Carbon Nanotubes
Asphalt Mixture
Rutting Resistance
Cracking Resistance
Semi-Circular Flexural Failure Test
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