Corrosion　of　steel　reinforcement　is　a　major　concern　when　applying　seawater　sea-sand　concrete　(SSC).　This　paper　presents　a　seawater　sea-sand　recycled　aggregate　concrete　(SSRAC)　column　confined　by　engineered　cementitious　composite　(ECC)　or　conventional　natural　aggregate　concrete　(NAC)　shell　and　its　mechanical　behavior　under　eccentric　compression.　With　the　analysis　of　bearing　capacity,　deformation　and　failure　pattern,　the　results　show　that　the　bearing　capacity　of　NAC　shell　confined　SSRAC　columns　is　0.90–1.18　times　to　that　of　SSRAC　columns,　while　that　of　ECC　shell　confined　SSRAC　columns　increases　76–85%　with　the　load　eccentricity　ratio　of　0.3,　and　83–109%　with　the　load　eccentricity　ratio　of　0.6.　When　the　ECC　shell　is　adopted,　the　lateral　deformability　of　columns　increases　34–111%　with　the　load　eccentricity　ratio　of　0.6　compared　with　the　case　of　SSRAC　column.　Moreover,　both　the　cross-section　layer-by-layer　method　and　simplified　method　were　used　to　determine　the　bearing　capacity　of　columns.　©　2021　Elsevier　Ltd