ABSTRACT
Porous Asphalt, PA, is widely used in the Netherlands because of its noise reducing properties. At the end of its service life the PA surfacing layer is milled off and replaced by new PA. The reclaimed PA most often contains high quality aggregates and highly aged bitumen, it is of importance to reuse the valuable reclaimed PA into PA or other surface layers. With support of the European Life+ program, a technique was developed to reclaim the aggregates from milled-off PA. This so-called PA-stone has a bitumen content less than 1%. The reclaimed PA-stone can be seen as aggregates and can be used to replace virgin aggregates during the production of new asphalt. It is concluded from the laboratory results that the use of PA-stone for the production of new porous asphalt leads to a mixture with superior performance in comparison to the use of the untreated reclaimed PA.
