Geopolymer　concrete　holds　immense　potential　as　a　viable　alternative　to　ordinary　Portland　cement　(OPC)　concrete;　however,　its　application　for　structures　has　been　hindered　by　its　low　compressive　strength　relative　to　conventional　OPC　concrete.　This　study　investigates　the　utilization　of　carbon-fiber-reinforced　polymer　(CFRP)　tubes　to　confine　fly-ash-based　geopolymer　(FAGPR)　concrete　and　its　graphene　oxide　(GO)-modified　counterpart　(GFAGPR),　with　the　aim　of　enhancing　compressive　strength.　Experimental　investigation　reveals　significant　improvements　in　mechanical　strength.　Furthermore,　we　conducted　a　life　cycle　assessment　(LCA)　to　compare　the　environmental　impacts　and　economic　costs　of　OPC,　FAGPR,　and　GFAGPR-concrete-filled　CFRP　tube　composites,　and　their　concrete-only　counterparts,　over　a　100-year　service　life.　The　LCA　results　indicate　that　the　(G)FAGPR　composites　exhibit　significantly　lower　CO2　emissions　than　their　OPC-tube　counterpart.　However,　the　OPC　composite　is　currently　the　most　economic　among　all　candidates.　Additionally,　the　admixed　GO　not　only　mitigates　the　environmental　impacts　but　also　reduces　the　cost　of　FAGPR-tube　composite,　likely　because　of　the　GO-enhanced　strength　of　core　FAGPR　concrete　reducing　the　usage　of　CFRP　tube　that　features　higher　cost　and　higher　GWP　coefficient.　©　The　Author(s)　2025