Asphalt displays elastic-plastic-viscose characteristics that are highly temperature-dependent. During asphalt pavement construction, the chance of cracks forming at low temperatures as well as permanent malformations in ruts due to high temperatures has to be taken into consideration. Unilateral optimisation of asphalt composition mostly ends up in reduced performance in terms of each of the contradicting temperature ranges.
The currently used types of asphalt with their individual layer thicknesses are the result of decades of experience gathered in the use of this material. With careful construction, the desired lifespan of a road can be insured in terms of today’s temperature spectrum. What is still uncertain, however, is by which means the current road usability periods can be attained if the temperature range is increasing due to climate change.
Therefore, an investigation following the „Guidelines for the mathematical dimensioning of the superstructure of road surfaces with asphalt paving" (RDO Asphalt) has been carried out to explore up to which increase of the annual mean temperature and traffic development the standard asphalt designs and dimensioning can be used to reach the usual road usability periods.