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- Title
Laboratory evaluation of cracking resistance for asphalt mixtures modified with nanoclay and nanocellulose.
- Authors
Johnson, Thomas; Bala, Nura; Bayat, Alireza; Hashemian, Leila
- Abstract
Cracking failure is one of the major distress modes associated with asphalt pavement. Asphalt modification has been identified as an effective method to improve pavement performance. In this study, nanomaterials including bentonite and halloysite nanoclays and nanocellulose are added to PG 64-28 straight run asphalt binder for modification. The potential of these nanomaterials for improving the cracking performance of asphalt pavements at intermediate pavement service temperatures is investigated. Rheological evaluation is conducted using a dynamic shear rheometer (DSR), and the cracking resistance of the asphalt mixtures is determined through indirect tension asphalt cracking test (IDEAL-CT). A high-shear mixer is used to disperse the nanomaterial in the asphalt and the field emission scanning electron microscope (FESEM) analysis shows a relatively good dispersion of the nanomaterials. Furthermore, the results of the IDEAL-CT show an improvement in cracking test index by as much as 47%–114% through nanomaterial modification.
- Subjects
ASPHALT pavements; ASPHALT; FIELD emission electron microscopes; ASPHALT testing; NANOSTRUCTURED materials
- Publication
Canadian Journal of Civil Engineering, 2021, Vol 48, Issue 12, p1674
- ISSN
0315-1468
- Publication type
Article
- DOI
10.1139/cjce-2020-0644