To　study　the　mechanical　performance　of　recycled　aggregate　concrete　(RAC)　columns　under　sustained　loads　and　chloride　corrosion,　we　design　ten　sample　columns　of　large　eccentric　compressive　reinforced　RAC　and　test　them　using　three　variables:　replacement　rate　of　recycled　aggregate,　loading　strength,　and　corrosion　rate　of　steel.　In　the　experiment,　the　columns　are　electrically　corroded　under　sustained　load,　and　then　their　bearing　capacity　and　corrosion　rate　of　reinforcement　steel　bars　are　measured.　And　stiffness　and　ductility　are　also　examined.　The　results　show　that　the　number　of　rust　expansion　cracks　and　the　corrosion　rate　of　longitudinal　reinforcement　both　increase　with　the　increase　in　replacement　rate　or　loading　strength.　With　an　increase　in　replacement　rate,　stiffness,　bearing　capacity　and　ductility　decrease,　but　the　varying　trends　in　loading　strength　are　different.　A　higher　corrosion　rate　results　in　significantly　larger　opening　of　rust　expansion　cracks　and　lower　stiffness　and　bearing　capacity.　When　corrosion　rate　increases,　ductility　decreases　at　the　corrosion　rate　greater　than　3%　while　it　remains　nearly　the　same　at　the　rate　lower　than　3%　as　in　the　no　corrosion　cases.　The　strain　distribution　over　a　column　section　satisfies　the　plane　section　assumption.　Our　measurements　of　bearing　capacity　agree　well　with　the　calculations　obtained　using　an　analytical　formula　for　bearing　capacity　of　corroded　reinforced　concrete　columns.　©　2018　All　right　reserved.