Abstract
Abstract In recent years, the use of nanoparticles as a binder modifier has increased because of their unique properties. This article investigates the effect of nanoclay and nano–aluminum oxide (Al2O3) particles on mixed mode I/II fracture behavior of hot mix asphalt (HMA) mixtures. In this study, two types of modified HMA mixtures were prepared for conducting the fracture experiments using cracked semicircular bend specimens. These modified HMA mixtures contained five different percentages (i.e., 2, 2.5, 3, 3.5, and 4 %) of nanoclay and four different percentages (i.e., 0.1, 0.4, 0.8, and 1.2 %) of nano-Al2O3. The fracture experiments demonstrated that both the nanoclay and nano-Al2O3 particles improve the fracture resistance of HMA mixtures significantly, such that nanoclay particles with percentages of 2, 2.5, 3, 3.5, and 4 % increase the fracture resistance by 2, 8, 14, 19, and 31 %, respectively. As such, improvement in the fracture resistance that was achieved by the use of 0.1, 0.4, 0.8, and 1.2 % nano-Al2O3 was on average 6, 15, 21, and 27 %, respectively. Furthermore, the improvement effect of nanoclay and nano-Al2O3 was more pronounced when the HMA mixtures were loaded under high shear deformation modes.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
