Micromorphology and microrheology of modified bitumen by atomic force microscopy
The rheological study of bitumen is essential to improve the performance of pavements. Bitumen properties are traditionally determined by means of dynamic shear rheometer measurements. In this work, the authors aim to demonstrate that atomic force microscopy (AFM) can be a powerful complementary tool to the characterisation of bitumen. In particular, the authors compare the mechanical properties of pure and modified bitumen. Two different anti-oxidant additives were used: poly-phosphoric acid (PPA) and cashew nut oil (LCC) at concentrations of 1% and 2%, respectively. The authors will show that the AFM technique is able to distinguish the effects of both additives in the morphological and micromechanical properties of bitumen films.
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- Abstract reprinted with permission of Taylor & Francis.
- Rebelo, L.M.
- Cavalcante, Pablo N
- de Sousa, J S
- Mendes Filho, J
- Soares, S A
- Soares, J B
- Publication Date: 2014-4
- Media Type: Web
- Features: References;
- Pagination: pp 300-311
- TRT Terms: Asphalt additives; Bitumen; Mechanical properties; Microscopy; Morphology; Rheology
- Uncontrolled Terms: Atomic force microscopy
- Subject Areas: Highways; Materials; I31: Bituminous Binders and Materials;
- Accession Number: 01523790
- Record Type: Publication
- Files: TRIS
- Created Date: Apr 17 2014 3:00PM