| Autor: |
Luz S. Quintero, Luis E. Sanabria |
| Rok vydání: |
2014 |
| Předmět: |
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| Zdroj: |
Application of Nanotechnology in Pavements, Geological Disasters, and Foundation Settlement Control Technology. |
| DOI: |
10.1061/9780784478448.004 |
| Popis: |
This paper presents the research results of asphalt modification with a MWCNT/SBS nanocomposite, the preparation of nanocomposite asphalt mixes, some rheological properties of the modified asphalts, their microstructural characterization, and the dynamic evaluation of the asphalt mixes. The rheological properties of the modified asphalts were comparatively studied to choose the best composition to prepare the asphalt mixes. The microstructure of the SBS polymer nanocomposite and the nanocomposite modified asphalt were studied using a scanning electron microscope (SEM). A good dispersion of nanotubes was observed in the nanocomposite modified asphalt, as well as a progressive increase in the diameter of the nanotubes in the nanocomposites. From the experimental results, there is a positive influence of the nanotubes dispersion in the aging resistance of the modified asphalt. Asphalt mixes prepared with this new nanocomposite modified asphalt are not susceptible to moisture damage (tensile strength ratio = 97%). They experienced 68% of the permanent deformation of the mixes prepared with plain SBS modified asphalt. The results further showed that the nanocomposite modified asphalt-binder can be used to prepare high modulus asphalt pavements with Pen 60/70 asphalt-binder. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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