Journal article
Rheological Properties and Chemical Bonding of Asphalt Modified with Nanosilica
Journal of materials in civil engineering, Vol.25(11), pp.1619-1630
11/01/2013
Handle:
https://hdl.handle.net/2376/124209
Abstract
AbstractThe objective of this study is to evaluate the rheological properties and chemical bonding of nano-modified asphalt binders blended with nanosilica. In this study, the nanosilica was added to the control asphalt at contents of 4% and 6% based on the weight of asphalt binders. Superpave binder and mixture tests were utilized in this study to estimate the characteristics of the nano-modifed asphalt binder and mixture. The rotational viscosity (RV), dynamic shear rheometer (DSR), bending beam rhometer (BBR), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), asphalt pavement analyzer (APA), dynamic modulus (DM) and flow number (FN) tests were used to analyze rheological properties and chemical bonding changes of the nano-modified asphalt binder and the performance of the nano-modified asphalt mixture. In addition, the performance of nano-modified asphalt after rolling thin-film oven (RTFO) short-term and pressure-aging vessel (PAV) long-term aging was assessed as well. The dissipated work per load cycle for the asphalt binder was used to evaluate the rheological properties of the nano-modified asphalt binder. Based on the binder test results, it was found that the additional nanosilica in the control asphalt binder slightly decreased the viscosity of the control asphalt binder, maintained low dissipated work per load cycle, held a similar low-temperature performance to the control asphalt, and had a positive effect on antioxidation. From the mixture test results, the dynamic modulus and flow number of nano-modified asphalt mixtures improved, and the rutting susceptibility of nano-modified asphalt mixtures was reduced compared to the control asphalt mixture. In general, the findings from this study show that the antiaging property and rutting and fatigue cracking performance of nanosilica modified asphalt binders are enhanced, and the addition of nanosilica in the control asphalt mixture significantly improves the dynamic modulus, flow number, and rutting resistance of asphalt mixtures.
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Details
- Title
- Rheological Properties and Chemical Bonding of Asphalt Modified with Nanosilica
- Creators
- Hui Yao - Michigan Technological Univ. Research Assistant, Dept. of Civil and Environmental Engineering, , 1400 Townsend Dr., Houghton, MI 49931-1295. E-mailZhanping You - Michigan Technological Univ. Associate Professor, Dept. of Civil and Environmental Engineering, , 1400 Townsend Dr., Houghton, MI 49931-1295 (corresponding author). E-mailLiang Li - Central South Univ. Professor, School of Civil Engineering and Architecture, , Changsha, Hunan, 410075, . E-mailChee Huei Lee - Michigan Technological Univ. Postdoctoral Research Associate, Dept.of Physics, , 1400 Townsend Dr., Houghton, MI 49931-1295. E-mailDavid Wingard - Clemson Univ. Research Assistant Professor, Dept. of Civil Engineering, , Clemson, SC 29634. E-mailYoke Khin Yap - Michigan Technological Univ. Professor, Department of Physics, , 1400 Townsend Dr., Houghton, MI 49931-1295. E-mailXianming Shi - Montana State Univ. Associate Research Professor, Civil Engineering, Western Transportation Institute, , Bozeman, MT 59717-4250. E-mailShu Wei Goh - Michigan Technological Univ. Research Assistant, Dept. of Civil and Environmental Engineering, , 1400 Townsend Dr., Houghton, MI 49931-1295. E-mail
- Publication Details
- Journal of materials in civil engineering, Vol.25(11), pp.1619-1630
- Academic Unit
- Civil and Environmental Engineering, Department of
- Publisher
- American Society of Civil Engineers
- Identifiers
- 99900612059201842
- Language
- English
- Resource Type
- Journal article