利用湿法生产机制砂尾泥制备流态固化土试验研究

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中图分类号：TU528 文献标志码：A 文章编号：1005-8249（2025）02-0018-07

DOI：10.19860/j.cnki.issn1005-8249.2025.02.004

Abstract：Fluidizedsolidifiedsoil waspreparedbystabilizing tailingssludgeusingcementcuringagentsandsolid waste-based cementitious curing agents，respectively.Theeffctsof water-solidratio，binder-soilratio，activatordosage，and sandsoilratioontheworkabilityandmechanicalpropertiesofthefluidizedsolidifiedtailingssludgewereinvestigatedthrough experimentson flow spread，seting time，bleedingrate，rheological properties，andunconfined compressvestrength．The results indicate that：With a water-solid ratio of O. 62-O.69 and a dosage of 7 % - 1 1 % cement curing agent or 1 5 % - 1 7 % GC curing agent，the 28 days strength of the fluidized solidified tailings sludge ranges from 0.56 to ，meeting the requirementsforgeneralnon-structuralbackfllengiering.ForGC-curedfluidizedsoiloptimizedwithawater-solidratioof （20 0 . 6 2 ， 20 % activator dosage，and controlled sand -soil ratio of 0 . 3 （incorporating recycled fine aggregates to improve particle gradation），the flow spread reaches 2 6 5 m m ，the 28 days strength attains 2 . 6 6 M P a ，and the bleeding rate remains below 3 % ， fulfllingeitfaltregthstruturalackfillapplicatios.WenteviscositofthemixdsuistanO.， thefluidizedsolidifiedsoilmixtureexhibitsahigherprobabilityofbleeding.Proposethecontrollbleparametersandcementitious material dosage inthepreparationoffluidizedstabilizedsoilusing manufacturedsandwashing tailings.Teresearch findingscan provide references for the reuse of wet-process manufactured sand tailings.

Keywords：tailingsofmechanicallycrushedsand；flowablefillorself-compactingbackfill；fullwaste-basedcementitious materials ； rheological properties； water-to- solid ratio

0 引言

根据调查，我国机制砂石年产量高达200亿t，是全球最大的机制砂石生产国。（剩余7802字）