In an effort to give a global view of this field of research, in this mini-review we highlight
the most recent publications and patents focusing on modified asphalt pavements that contain certain
reinforcing nanoparticles which impart desirable thermal, electrical and mechanical properties. In response
to the increasing cost of asphalt binder and road maintenance, there is a need to look for alternative
technologies and new asphalt composites, able to self-repair, for preserving and renewing the existing pavements.
First, we will focus on the self-healing property of asphalt, the evidences that support that healing takes place immediately
after the contact between the faces of a crack, and how the amount of healing can be measured in both the laboratory and
the field. Next we review the hypothetical mechanisms of healing to understand the material behaviour and establish models
to quantify the damage-healing process. Thereafter, we outline different technologies, nanotechnologies and methodologies
used for self-healing paying particular attention to embedded micro-capsules, new nano-materials like carbon
nanotubes and nano-fibres, ionomers, and microwave and induction heating processes.
Keywords: Asphalt pavements, induction heating, micro-capsules, microwave absorption, road engineering, self-healing, carbon
nanotubes, graphite, silicon dioxide, titanium dioxide.
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