To　facilitate　the　use　of　geopolymer　materials　in　shotcrete　applications,　this　study　presents　the　development　of　a　geopolymer　mortar　and　explores　its　flowability　and　early-stage　mechanical　properties.　Firstly,　15　groups　of　geopolymer　mortar　specimens　with　3　liquid-binder　ratios　(0.70,　0.75　and　0.80)　and　5　binder-aggregate　ratios　(0.225,　0.250,　0.275,　0.300　and　0.325)　were　developed.　Secondly,　the　P-wave　velocity,　slump,　early-age　compressive　strength　and　compressive　strength　were　obtained　by　ultrasonic　pulse　velocity　test,　slump　test　and　uniaxial　compressive　test.　Thirdly,　discussion　on　the　effect　of　liquid-binder　ratio　and　binder-aggregate　ratio　on　P-wave　velocity,　flowability,　compressive　strength　and　early-age　compressive　strength　of　geopolymer　mortar　were　carried　out.　Finally,　an　optimal　mix　proportions　rang　of　geopolymer　mortar　materials　that　meet　the　requirements　of　wet　shotcrete　technology　were　proposed.　The　results　show　that　P-wave　velocity,　slump,　early-age　compressive　strength　and　compressive　strength　increase　as　the　increasing　of　liquid-binder　ratio.　The　slump,　compressive　strength　and　P-wave　increase　as　the　increasing　of　binder-aggregate　ratio.　Moreover,　the　optimal　binder-aggregate　ratios　were　proposed　as　0.244　-　0.321,　0.228　-　0.298,　and　0.209　-　0.241　for　geopolymer　mortar　with　a　liquid-binder　ratio　of　0.70,　0.75　and　0.80,　respectively.　Geopolymer　mortar　in　these　mix　proportions　achieves　compressive　strengths　ranging　from　28.4　MPa　to　41.1　MPa　after　curing　for　1　day　and　44.2　MPa　to　55.4　MPa　after　curing　for　28　days.　The　mix　proportion　of　geopolymer　mortar　proposed　in　this　paper　can　simultaneously　meet　the　standard　requirements　for　mechanical　properties　and　flowability,　demonstrating　potential　for　wet　shotcrete　applications.　©　2024　Elsevier　Ltd