The　axial　compression　performance　of　concrete　filled　steel　tubular　(CFST)　columns　using　high-strength　recycled　aggregate　concrete　(RAC)　instead　of　normal　concrete　(NC)　was　studied　in　an　attempt　to　use　demolition　debris　for　effective　recycling　in　construction　works.　Five　specimens　(three　RAC-filled　steel　tubular　(RACFST)　columns　and　two　reference　CFST　columns)　were　tested　to　investigate　the　influence　of　tube　shape　(circular　or　square),　concrete　type　(NC　or　RAC)　and　internal　structure　(installation　of　a　steel　reinforcement　cage　or　not).　The　test　results　indicate　that　damage　development　and　failure　mode　of　RACFST　columns　are　similar　to　those　of　CFST　columns.　For　the　same　cross-sectional　area,　steel　ratio　and　material　strength,　circular　section　specimens　were　found　to　have　a　higher　load-bearing　capacity　and　better　deformability　than　square　section　specimens.　The　replacement　of　NC　with　RAC　has　relatively　less　influence　on　the　axial　compressive　behaviour　of　square　section　specimens　than　on　circular　specimens.　A　steel　reinforcement　cage　inside　the　square　section　specimen　was　found　to　strengthen　confinement　to　the　core　concrete,　which　significantly　improved　the　bearing　capacity　and　deformability.　The　results　obtained　are　compared　with　the　ultimate　strengths　of　RACFST　columns　predicted　using　existing　design　codes.　Considering　the　size　effect,　a　formula　for　calculation　of　the　bearing　capacity　of　square　CFST　columns　is　suggested;　comparisons　of　the　predicted　results　show　good　agreement　with　the　experimental　data.