The construction and development of urban rail transit and underground space produce a large amount of shield muck.However,the traditional muck treatment method brings great challenges to the ecological environment and resource protection.In view of this,the Recycled Solidified Soil-Engineering Residue(RSS-ER)prepared by combining cementitious materials with shield muck effectively solves this problem.Under the premise of ensuring that the water-solid ratio is 0.35,mineral powder,fly ash and silicon powder are selected for different orthogonal combinations,and the fluidity test,unconfined compressive strength test and microstructure test of RSS-ER with different mixing ratios are carried out.Research shows that fluidity of RSS can meet the requirements of filling materials in general backfill engineering;the unconfined compressive strength of RSS-ER is positively related to the curing time,and the strength of the specimen cured at room temperature is higher than that of specimens cured under water;the pores between the slag skeletons are filled with the hydration products C-S-H gel and C-A-S-H gel,which is the reason why the integrity and strength of RSS-ER are improved.
关键词
盾构渣土/再生固化充填材料/流动性/无侧限抗压强度/微观结构试验
Key words
shield muck/recycled solidified soil-engineering residue/liquidity/unconfined compression strength/microstructure test
维普
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