Improving aging resistance and fatigue performance of asphalt binders using inorganic nanoparticles

•Nano TiO2 and nano CaCO3 particles improved aging resistance of asphalt binder.•Nano SiO2 modified binders outperformed other binders in terms of fatigue behavior.•Linear amplitude sweep test results were consistent with the time sweep test.•Larger specific surface area of nano SiO2 contributed to...

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Bibliographic Details
Published in:Construction & building materials 2018-05, Vol.170, p.591-602
Main Authors: Nazari, Hossein, Naderi, Koorosh, Moghadas Nejad, Fereidoon
Format: Article
Language:English
Subjects:
Aging
Asphalt binder
Fatigue
Nano CaCO3
Nano silica
Nano TiO2
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Summary:•Nano TiO2 and nano CaCO3 particles improved aging resistance of asphalt binder.•Nano SiO2 modified binders outperformed other binders in terms of fatigue behavior.•Linear amplitude sweep test results were consistent with the time sweep test.•Larger specific surface area of nano SiO2 contributed to modification of the binder. The use of inorganic nanoparticles in asphalt binders and mixtures to improve performance related properties have gained a popularity in recent years. Extremely large interface area with asphalt binder matrix is the most important feature of these nanoparticles which translates in a higher degree of changes in the microstructure of asphalt binder. In this research, different inorganic nanoparticles of SiO2, TiO2 and CaCO3 were mixed with asphalt binder and the chemical and microstructural properties of the nanocomposites were evaluated using X-ray diffraction and scanning electron microscopy, respectively. The effect of oxidative aging has been investigated using Fourier Transform Infrared spectroscopy as well as the determination of viscoelastic properties of the modified binders. Furthermore, strain-controlled Time Sweep and Linear Amplitude Sweep tests were used to evaluate the performance of nanocomposites against fatigue cracking. The results indicated improved aging resistance by addition of TiO2 and CaCO3 nanoparticles to asphalt binder. Moreover, nano silica enhanced fatigue properties in the whole range of strain levels. However, different variables such as additive content and strain level affected the fatigue behavior of TiO2 and CaCO3 modified binders.
ISSN:0950-0618
1879-0526
DOI:10.1016/j.conbuildmat.2018.03.107