To　address　the　significant　carbon　emissions　caused　by　the　cement　industry　and　its　contribution　to　the　greenhouse　effect,　there　is　an　urgent　need　for　new　construction　materials　that　can　substantially　reduce　the　use　of　traditional　Portland　cement.　Alkali-activated　binders,　known　for　their　excellent　performance　and　lower　carbon　footprint,　have　emerged　as　a　promising　alternative.　Despite　the　numerous　advantages　of　geopolymers,　their　practical　application　is　hindered　by　challenges　in　processability　required　for　construction　techniques,　such　as　pumping,　spreading,　and　forming.　This　study　focuses　on　enhancing　the　rheological　properties　of　geopolymers　through　mechanochemical　activation　and　exploring　the　modification　mechanisms　involved.　Slag　and　fly　ash　raw　materials　were　processed　under　different　ball　milling　conditions,　specifically　varying　ball　milling　rotation　speed　(BR)　and　ball　milling　time　(BT).　The　mechanical　properties,　workability,　and　rheological　behavior　of　geopolymer　specimens　were　evaluated　to　identify　the　optimal　milling　parameters　affecting　these　properties.　Detailed　analysis　using　XRD,　SEM,　and　heat　of　hydration　tests　elucidated　the　phase　composition,　microstructural　evolution,　and　thermal　characteristics　of　mechanochemically　modified　geopolymers,　providing　insights　into　the　fundamental　mechanisms　of　mechanochemical　activation　modification.　The　results　indicate　a　significant　correlation　between　ball　milling　parameters　and　the　rheological　properties　of　geopolymers.　The　optimal　milling　regime　was　identified　as　grinding　at　a　speed　of　70r/min　for　50　min.　This　specific　milling　condition　imparts　ideal　properties　to　the　geopolymer,　including　moderate　yield　stress　(34.353　Pa),　low　plastic　viscosity　(0.452　Pa　s),　good　thixotropy,　and　high　28d　strength　(53.28　MPa),　without　any　significant　shear　thickening　behavior.　©　2024