Effect of bitumen properties in the induction healing capacity of asphalt mixes

•Effect of bitumen properties on induction healing capacity of asphalt mix was studied.•Asphalt mixes with five types of bitumen were studied.•Bitumen properties and healing capacity are not linearly correlated.•Possible non-linear correlation between healing and coefficient of thermal expansion.•Po...

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Bibliographic Details
Published in:Construction & building materials 2018-11, Vol.190, p.131-139
Main Authors: Gómez-Meijide, Breixo, Ajam, Harith, Garcia, Alvaro, Vansteenkiste, Stefan
Format: Article
Language:English
Subjects:
Analysis
Asphalt
Bitumen properties
Bituminous materials
Induction heating
Mechanical properties
Self-healing
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Summary:•Effect of bitumen properties on induction healing capacity of asphalt mix was studied.•Asphalt mixes with five types of bitumen were studied.•Bitumen properties and healing capacity are not linearly correlated.•Possible non-linear correlation between healing and coefficient of thermal expansion.•Possible non-linear correlation between healing and stiffness and viscosity. The visco-elasto-plastic nature of asphalt mixtures gives the material the capacity to self-heal cracks. One of the most promising methods to accelerate the healing phenomenon is the addition of conductive particles to the mix that can be externally heated by applying electromagnetic induction. The present paper studies the influence of bitumen properties on the induction healing capacity of asphalt mixtures. The main conclusion that can be extracted is that, for the range of bitumens commonly used in Europe, the fact of changing the type of bitumen does not significantly affect the healing capacity of the resulting asphalt mix.
ISSN:0950-0618
1879-0526
DOI:10.1016/j.conbuildmat.2018.09.102