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Home  > Raw materials & technologies  > Applications  > On-demand asphalt healing using nanomagnets

Monday, 16 September 2019
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Raw materials & technologies, Applications

On-demand asphalt healing using nanomagnets

Wednesday, 5 October 2016

An invention by Empa researchers offers an enhanced and simplified method for the healing of stress-induced cracks in bitumen-based road pavements.

On-demand asphalt healing using nanomagnets. Source: lichtkunst73/pixelio.de

On-demand asphalt healing using nanomagnets. Source: lichtkunst73/pixelio.de

Magnetic nanoparticles embedded in the bituminous pavement material serve as heating agents, remotely excited with an electromagnetic field; as the nano-magnets heat up, they locally melt the bitumen and reduce its viscosity, such that small cracks from loss of cohesion and adhesion of pavement components are healed.

Applying to road construction without additional skills

The novel material can be applied to road construction without requiring additional skills or equipment, since the embedded magnetic nanoparticles are added to the asphalt during its preparation at the provider’s site. Crack healing is easily achieved by locally applying an alternating magnetic field using standard equipment.

Please click here to get more information about the new technology.

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