To　investigate　the　bond-slip　behavior　of　the　interlace　in　large　high-strength　concrete-filled　circular　steel　tubes　(HSCFCSTs),　18　specimens　with　6　different　constructions　(HSCFCSTs　with　no　additional　construction,　with　built-in　studs,　with　built-in　circular　ribs,　with　built-in　vertical　ribs,　and　with　various　combinations　of　the　above)　were　examined　using　push-out　tests.　Specimens　were　constructed　from　high-strength　concrete　or　recycled　aggregate　concrete　(RAC).　The　bond-slip　behavior　and　slip-failure　mechanisms　were　analyzed　through　comparison　of　load-slip　curves,　slip　displacements,　and　steel　tube　strain　to　generate　predicted　load-slip　curves　based　on　multiple　parameters.　Experiments　revealed　that　the　bond-slip　curves　of　HSCFCSTs　with　no　additional　constructions　contained　an　ascending　section,　a　rapidly　descending　section,　and　a　residual　section.　For　tubes　with　special　constructions,　the　descending　section　was　either　postponed　or　not　visible,　the　interfacial　bonding　properties　were　enhanced　when　using　special　constructions,　the　concrete　strength　and　bond　strength　were　positively　correlated,　and　the　RAC　had　better　bonding　behavior　than　normal　concrete.　The　predicted　load-slip　curves　agreed　with　the　test　curves　and　provided　a　theoretical　basis　for　HSCFCST　applications.　(C)　2020　Elsevier　Ltd.　All　rights　reserved.