Considering　the　heterogeneity　of　concrete　and　temperature-dependency　of　materials,　both　2D　and　3D　random　aggregate　structures　of　concrete　were　established　to　analyze　the　heat　conduction　behavior　of　heterogeneous　concretes.　In　the　numerical　homogenization　technique,　concrete　was　regarded　as　a　heterogeneous　material　consisting　of　three　components,　i.e.,　aggregate,　mortar　matrix　and　the　interfacial　transition　zones　(ITZs).　The　temperature-dependent　thermal　properties　of　mortar　and　aggregate　were　obtained　based　on　the　experimental　data　from　the　available　literatures　and　those　of　the　ITZ　were　determined　by　comparing　the　simulation　results　with　measured　values.　The　heat　conduction　equations　were　solved　by　using　finite-element　method.　Good　agreement　between　the　present　simulation　results　and　available　test　observations　illustrates　the　accuracy　and　reasonability　of　the　developed　approach.　The　simulation　results　indicate　that　not　only　the　effective　thermal　conductivity　(ETC)　but　also　a　more　accurate　temperature　field　of　concrete　can　be　obtained　by　the　meso-scale　simulation　method　considering　temperature-dependency　of　materials＇　thermal　properties.　Aggregate　shape　has　a　negligible　influence　on　the　ETC　of　concrete　while　the　effect　of　aggregate　type　cannot　be　ignored　due　to　their　different　thermal　conductivities.　The　ETC　of　concrete　increases　with　increasing　aggregate　content　while　decreases　when　the　temperature　increases.　©　2018,　Editorial　Department　of　Journal　of　Beijing　University　of　Technology.　All　right　reserved.