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, we aim to demonstrate that atomic force microscopy (AFM) can be a powerful complementary tool to the...

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Bibliographic Details
Published inRoad materials and pavement design Vol. 15; no. 2; pp. 300 - 311
Main Authors Rebelo, L.M., Cavalcante, P.N., de Sousa, J.S., Mendes Filho, J., Soares, S.A., Soares, J.B.
Format Journal Article
LanguageEnglish
Published Abingdon Taylor & Francis 03.04.2014
Lavoisier
Subjects
Additives
AFM
Glass substrates
Hertz model
Investigations
microrheology
Microscopy
Rheology
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Summary: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.
ISSN:1468-0629
2164-7402
DOI:10.1080/14680629.2013.869885