Long-term behavior of the micro-texture of aggregates used on roads subjected to extreme climate conditions and winter maintenance operations

The micro-texture of fine and coarse aggregates used on roads is one the main factors responsible for skid resistance asphalt pavements. However, long-term behavior this property regarding effects traffic climate conditions has been poorly studied. Therefore, in paper, two types aggregates, schist amphibolite, commonly that are subjected to winter maintenance actions high temperatures summer have characterized with an optical roughness tester, fluorescence microscopy Polished Stone Value test. extreme simulated a laboratory durability tests (freeze-thawing thermal stress cycles) including NaCl as deicer during operations. Results shown wearing mechanisms aggregates’ surfaces different their composition internal texture. On weather applied do not significantly deteriorate micro-texture. combined effect NaCl, double decrease surface measured when these laboratory, improving, some cases, resistance. Conversely, external considered same analyzed amphibolite aggregate.