Study on solidified performances and mechanisms of several solid wasted based soil stabilizers
In order to reduce the use of cement and improve the utilization of solid waste,the solidifying performances of three solid waste based inorganic stabilizers(SSC with 75％ground slag,20％gypsum and 5％cement,SDG with 60％ground slag,30％car-bide slag and 10％gypsum,CDF with 40％carbide,30％fly ash and 30％cement)were investigated in this paper,mainly including the unconfined compressive strength,water stability coefficient,water absorption rate and resistance to drying-wetting cycles.The re-sults show that the optimum moisture content increases and the maximum dry density decreases with the addition of soil stabilizers.Among the three stabilizers,the SDG-solidified soil owns the highest strength,and the unconfined compressive strength of 7d and 28 d reached 4.96 MPa and 5.42 MPa,respectively.The SSC-solidified soil exhibits a poor solidifying performance,especially in the early stage,the strength of 7 d is only 2.16 MPa,and the coefficient of water stability is only 0.727.The microscopic analysis results show that compared with the SSC-solidified soil and the CDF-solidified soil,the SDG has a high hydration degree and the connection be-tween the particles is more dense,thus,the structure is more stable.
万方数据
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