A binder of a hot bituminous concrete undergoes two type of ageing: a fast ageing with construction (coating, implemented and cooling at the room temperature) and a slow ageing once in the roadways. Ageing is expressed by two parallel reactions that occur during the oxidation; an oxidation of the basic bitumens and the degradation of polymer, oxidation of the modified binders had as consequence an increase in asphaltenes in the basic bitumen and a molecular reduction in size of the polymer modifiers. In this present work we studied the influence, of the grain seize (large and fine) of the waste and the content of an industrial waste for two hours of mixing time, on the rheological behavior of an aspahlt cement AC 35-50 on the effect of artificial ageing RTFOT (Rolling Thin Film Oven Test). This study shows that all the binders undergo an ageing after the RTFOT test. The results of this study show an increase of the softening point and the remaining penetrability of the modified bitumens with a larger grain seize according to the content of industrial waste.
International Congress on Advances in Applied Physics and Materials Science
- Pub Date:
- December 2011
- grain boundaries;
- Solid solution hardening precipitation hardening and dispersion hardening;
- Mixing and blending;
- Grain and twin boundaries