The model for induction-healing asphalt concrete

• Induction heating of asphalt concrete is accomplished by adding electrically conductive particles to the asphalt mixture, and heating them with an induction heating device. When the temperature of the asphalt concrete is higher than 30-70 °C, cracks may start closing. In this article, the healing properties of 25 different mixtures, with the same aggregates distribution and amount of bitumen, but with 2 different lengths, 4 different quantities, and 4 different diameters of steel wool fibers have been considered. It has been found that the asphalt concrete studied can be healed up to 60% and that healing happens when the temperature is higher than 50 °C. Additionally, asphalt healing versus the increase of temperature has been fitted through an equation based on the capillary theory, showing that capillary flow is the main parameter affecting asphalt healing at high temperature.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Samhällsbyggnadsteknik -- Byggproduktion (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Civil Engineering -- Construction Management (hsv//eng)

Nyckelord

Asphalt

Asphalt concrete

Asphalt pavements

Capillarity

Publikations- och innehållstyp

ref (ämneskategori)

kon (ämneskategori)