Healing van Asfaltmengsels: Onderzoek naar een pragmatische proefmethode

Het zelfherstellend vermogen, of de healingscapaciteit, van asfaltmengsels wordt in de meeste ontwerpmethoden voor wegverhardingen meegenomen. De kennis over dit zelfherstellend vermogen is gebaseerd op ervaringen en onderzoeken uit het verleden en de werkelijke mechanismen erachter zijn niet bekend. Hierdoor is het moeilijk om voor nieuwe...

Direct Tensile Test to Assess Healing in Asphalt

Asphalt concrete has the advantageous ability to heal. During rest<br/>periods, damage present In the material is restored to a certain extent.<br/>Healing of the material can be observed in iis regaining of strength<br/>and stiffness after rest periods. In this paper, a new test method is presented.<br/>It was developed to increase the...

The importance of wetting in healing of bitumen

Asphalt concrete has the advantageous ability to heal autonomously, however the mechanisms behind this are not fully understood. To increase insight in the healing mechanism, the healing model used in polymer science is adopted. It interprets healing as the sum of wetting and intrinsic healing. The presented work introduces a new test set-up,...

Mechanisms in Healing of Bitumen and the Impact of Normal Force

Damage in pavements is known to reduce over time when the material is left to rest, this phenomenon is known as healing. It has been shown that healing is an important influence factor in pavement performance. However, an accepted method to assess the healing capability of a pavement is currently not available. Healing of cracks is assumed to be...

Het healingmechanisme van bitumen nader verklaard

Asfalt heeft de aantrekkelijke eigenschap dat het zichzelf kan herstellen na schade. Er is echter tot op heden geen betrouwbare methode om de healingcapaciteit van een asfaltmengsel te bepalen. Bij het healingproces van een discrete scheur spelen twee processen een rol, namelijk het in contact komen van de oppervlakken van de scheur; het...

The influence of boundary conditions on the healing of bitumen

Damage in pavements is known to reduce over time when the material is left to rest, this phenomenon is identified as healing. It has been shown that healing has a large influence on pavement performance. However, as the healing mechanism is not fully understood, there is currently no accepted method available to assess the healing performance...