Asphalt　is　known　to　have　self　healing　characteristics.　This　study　was　aimed　to　investigate　the　healing　behavior　of　asphalt　binders　under　short　-　and　long-term　oxidative　aging　conditions,　and　to　evaluate　the　relationship　between　healing　potential　and　chemical　properties.　Two　asphalt　binder　types　were　evaluated　which　included　one　neat　(unmodified)　asphalt　and　one　styrene　butadienestyrene　(SBS)　modified　binder.　Healing　characterization　was　based　on　the　recently　developed　linear　amplitude　sweep　based　healing　(LASH)　test.　Chemical　characterization　consisted　of　the　saturates,　aromatics,　resins,　and　asphaltenes　(SARA)　fractionation,　and　gel　permeation　chromatography　(GPC)　tests.　Based　on　the　obtained　healing　index　from　the　LASH　test,　oxidative　aging　generally　had　negative　effects　on　healing,　and　that　the　SBS　modifier　slightly　reduced　the　healing　potential　within　the　crack　initiation　phase.　Presence　of　more　light　fractions,　small　molecules,　and　molecules　that　are　longer　with　less　branches　would　promote　the　molecular　self-diffusion　across　crack　surfaces,　thereby　enhancing　the　healing　process.　The　negative　effect　of　oxidative　aging　on　healing　may　be　attributed　to　molecular　agglomeration　which　results　in　a　less　dispersed　structure　with　reduced　capability　of　the　asphalt　to　diffuse　across　crack　interfaces.　This　study　provided　a　preliminary　validation　of　the　LASH　test　and　the　healing　index.　(C)　2019　Elsevier　Ltd.　All　rights　reserved.