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Micromorphology and microrheology of modified bitumen by atomic force microscopy

Rebelo, L.M. / Cavalcante, P.N. / de Sousa, J.S. / Mendes Filho, J. / Soares, S.A. / Soares, J.B.

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, we aim to demonstrate that atomic force microscopy (AFM) can be a powerful complementary tool to the characterisation of bitumen. In particular, we compare the mechanical properties of pure and modified bitumen. Two different anti-oxidant additives were used: PPA (poly-phosphoric acid) and LCC (cashew nut oil) at concentrations of 1% and 2%, respectively. We 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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Micromorphology and microrheology of modified bitumen by atomic force microscopy

Rebelo, L.M. / Cavalcante, P.N. / de Sousa, J.S. / Mendes Filho, J. / Soares, S.A. / Soares, J.B.

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, we aim to demonstrate that atomic force microscopy (AFM) can be a powerful complementary tool to the characterisation of bitumen. In particular, we compare the mechanical properties of pure and modified bitumen. Two different anti-oxidant additives were used: PPA (poly-phosphoric acid) and LCC (cashew nut oil) at concentrations of 1% and 2%, respectively. We will show that the AFM technique is able to distinguish the effects of both additives in the morphological and micromechanical properties of bitumen films.

Micromorphology and microrheology of modified bitumen by atomic force microscopy

Rebelo, L.M. / Cavalcante, P.N. / de Sousa, J.S. / Mendes Filho, J. / Soares, S.A. / Soares, J.B.

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, we aim to demonstrate that atomic force microscopy (AFM) can be a powerful complementary tool to the characterisation of bitumen. In particular, we compare the mechanical properties of pure and modified bitumen. Two different anti-oxidant additives were used: PPA (poly-phosphoric acid) and LCC (cashew nut oil) at concentrations of 1% and 2%, respectively. We 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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Title:

Micromorphology and microrheology of modified bitumen by atomic force microscopy

Contributors:

Rebelo, L.M. (author) / Cavalcante, P.N. (author) / de Sousa, J.S. (author) / Mendes Filho, J. (author) / Soares, S.A. (author) / Soares, J.B. (author)

Published in:

Road Materials and Pavement Design ; 15 ; 300-311

Publication date:

2014-04-03

Size:

12 pages

ISSN:

1468-0629 , 2164-7402

DOI:

https://doi.org/10.1080/14680629.2013.869885

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

microrheology , AFM , Hertz model

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