The　thermophysical　parameters　of　asphalt　pavement　materials　are　vital　and　significant　to　accurately　predict　the　temperature　field　of　asphalt　pavement.　In　this　paper,　the　thermophysical　parameters　of　asphalt　composites　with　different　scales　were　tested　by　a　thermal　constant　analyzer.　A　computing　method　of　multi-scale　homogenization　thermal　conductivity　of　asphalt　composites　based　on　the　improved　Maxwell-Eucken　model　considering　interface　thermal　resistance　and　particle　shape　coefficient　was　proposed.　The　accuracy　of　the　proposed　computing　method　was　verified　by　the　experimental　results　of　thermal　conductivity　of　asphalt　composites　at　different　scales.　The　interface　thermal　resistance　coefficient　(α)　was　determined　by　using　the　thermal　conductivity　experimental　data,　α=0.1709.　The　results　show　that　the　thermal　conductivity,　thermal　diffusivity　and　thermal　effusivity　of　asphalt　mastic　increased　linearly,　but　the　specific　heat　capacity　decreased　with　the　increasing　of　filler　content.　The　TC　of　asphalt　composites　is　sorted　from　large　to　small　as　follows:　mixture,　mastic,　asphalt　binder.　Their　values　are　about　0.2,　0.6　and　1.2　W/(m∙oC),　respectively.　The　thermal　conductivity　of　mineral　powder　is　more　than　ten　times　higher　than　that　of　asphalt　binder.　The　particle　shape　coefficient　(aggregate　shape)　had　a　slight　effect　on　the　thermal　conductivity　of　asphalt　mixture.　But　the　interface　thermal　resistance　between　aggregate　particle　and　asphalt　mastic　had　a　significant　influence　on　the　thermal　conductivity　of　asphalt　mixture.　At　the　mixture　scale,　the　relative　error　between　the　computed　value　and　the　experimental　value　of　the　proposed　method　without　considering　the　interface　thermal　resistance　coefficient　was　about　30　%.　The　accuracy　of　the　proposed　thermal　conductivity　computing　method　considering　the　interface　thermal　resistance　coefficient　could　reach　more　than　90　%　in　the　mixture　scale.　The　proposed　method　of　calculating　thermal　conductivity　is　non-destructive　compared　to　the　test　method,　i.e.　it　does　not　damage　the　actual　pavement.　©　2024