Three-dimensional　(3D)　concrete　printing　(3DCP)　technology　attracts　significant　attention　from　research　and　industry.　Moreover,　adequate　mechanical　performance　is　one　of　the　primary　properties　for　materials,　meeting　the　demand　of　structural　safety　using　3DCP　technology.　However,　research　on　curing　conditions　as　the　significant　influence　factor　of　mechanical　capacity　is　required　to　accelerate　the　practical　application　of　3DCP　technology.　This　study　aims　to　explore　the　impact　of　various　steam　curing　conditions　(heating　rate,　constant　temperature　time,　and　constant　temperature)　on　the　mechanical　performance　of　printed　concrete　containing　solid　wastes.　Moreover,　the　optimal　steam　curing　conditions　are　obtained　for　compressive,　tensile,　and　flexural　properties　in　different　directions.　Subsequently,　anisotropies　in　the　mechanical　properties　of　printed　composites　and　interlayer　bonding　behaviors　are　investigated　when　various　curing　conditions　are　employed.　The　result　shows　that　steam　curing　conditions　and　solid　waste　incorporation　improves　the　interlayer　bond　for　3D　printed　cement-based　composites.　©　2022　by　the　authors.　Licensee　MDPI,　Basel,　Switzerland.