This study investigates the early strength development and rapid setting effects of 4 inorganic salt acti-vating agents,namely water glass,NaOH,Na2SO4,and Al2(SO4)3,at different dosages in tailings and ore residue-based cementitious materials,elucidating their mechanisms.Results show that within a certain range of addition,the compressive strength of the filling specimens increases with age for all 4 activating agents.NaOH at a addition of 0.5%exhibits the best early strength development,followed by Na2SO4 at 1.0%addition,while Al2(SO4)3 at 0.5%addi-tion shows the most significant effect on later strength development,with water glass performing the poorest.Consider-ing practicality and economy,the composite use of Na2SO4 and Al2(SO4)3 added to tailings-based cementitious filling specimens demonstrates superior comprehensive performance.These findings effectively enhance the early strength of backfill body,providing scientific references for optimizing the structure and strength of backfill body in mines.
activating agentscementitious materialsore residueearly strengthrapid settingbackfill body
维普
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