Rheological Characterization of Nano-particle based Bio-modified Binder
This paper investigates the effects of nanoparticles (nano -clay and nano -silica) on the rheological characteristics of bio-modified asphalt. It further compares its performance characteristics with those of base asphalt, nano-clay modified asphalt (without bio-binder) and bio-modified asphalt (without nano-particles). As such, the following research hypotheses were investigated: 1) Nano particles will increase bio-modified binder (BMB) complex modulus which in turn increases BMB’s high temperature performance; 2) Nano particles will enhance BMB’s aging resistance, 3) Nano particles will act as a surfactant and stabilizer which will increase the BMB’s viscosity while maintaining mixtures’ workability. The effect of the nanoparticles on workability and high temperature performance of the asphalt binder with and without bio-binder was evaluated by measuring the rotational viscosity and complex shear modulus. The performance of each binder was evaluated for rutting resistance, aging resistance and creep stiffness performance behavior. The results indicated that the addition of nano-clay to bio-modified asphalt helped significantly improve high temperature performance. Correspondingly, the hardening of bio-modified asphalt saw a significant improvement as the percentage of nano-clay was increased. The data indicated that nano-silica improved the viscosity of the bio-modified asphalt binder but had little effect on the aging and rutting resistance of the mixtures. It was observed that nano-silica slightly increased bio-modified asphalt binder complex modulus with a decrease to binder low temperature performance. Overall, the characterization results suggested an improvement to bio-modified asphalt binder high temperature performance with the addition of nanoparticles.
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Supplemental Notes:
- This paper was sponsored by TRB committee AFK20 Characteristics of Asphalt Materials.
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Corporate Authors:
500 Fifth Street, NW
Washington, DC United States 20001 -
Authors:
- Onochie, Albert
- Fini, Elham
- Yang, Xu
- Mills-Beale, Julian
- You, Zhanping
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Conference:
- Transportation Research Board 92nd Annual Meeting
- Location: Washington DC, United States
- Date: 2013-1-13 to 2013-1-17
- Date: 2013
Language
- English
Media Info
- Media Type: Digital/other
- Features: Figures; References; Tables;
- Pagination: 16p
- Monograph Title: TRB 92nd Annual Meeting Compendium of Papers
Subject/Index Terms
- TRT Terms: Aging (Materials); Asphalt; Creep; High temperature; Nanostructured materials; Rheological properties; Rutting
- Uncontrolled Terms: Bio-binders
- Subject Areas: Highways; Materials; Pavements; I33: Other Materials used in Pavement Layers;
Filing Info
- Accession Number: 01476014
- Record Type: Publication
- Report/Paper Numbers: 13-4895
- Files: TRIS, TRB, ATRI
- Created Date: Mar 15 2013 5:05PM