Grout　is　sensitive　to　water　content,　and　to　investigate　the　effect　of　different　water-cement　ratios　of　grout　on　the　mechanical　performance　of　grout　sleeve　connections,　eight　conditions　were　designed　comprising　a　total　of　48　specimens　with　12　mm　diameter　steel　bars　subjected　to　uniaxial　tensile　tests.　Complemented　by　compressive　strength　adjustments　of　grout　specimens,　finite　element　software　was　employed　to　simulate　unit　fracture　criteria,　and　finite　element　simulations　were　conducted　on　selected　specimens.　Finally,　based　on　the　current　research　findings,　a　preliminary　derivation　of　the　compressive　strength　of　grout　and　the　calculation　process　of　sleeve　tensile　strength　was　achieved.　The　study　indicates:　(1)　specimens　primarily　fail　due　to　steel　bar　pullout　when　the　water-cement　ratio　exceeds　0.2;　failures　due　to　steel　bar　or　thread　rupture　are　predominant　when　the　ratio　is　below　0.2;　(2)　the　failure　mode　and　load-displacement　curves　in　numerical　simulations　correspond　to　experimental　trends;　(3)　there　exists　a　quantitative　relationship　between　calculated　load　and　theoretical　steel　bar　load,　with　the　critical　compressive　strength　of　grout　during　experiments　being　63.07　MPa　and　the　critical　water-cement　ratio　being　0.23.　©　2024　The　Authors.