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目前钢渣粉煤灰排放量大 ,利用率低 ,利用钢渣粉煤灰做路面基层材料可大量利用工业废渣 ,减少天然土石料的开采 ,是一种生态建筑材料。研究了钢渣粉煤灰的配比并对这种材料的压实性能进行了研究。钢渣掺量增加 ,其最大干密度增加 ,最佳含水量降低。以无侧限抗压强度为指标对其配比进行了优化 ,认为无机结合料的最优配比为钢渣∶粉煤灰 =1∶ 1、外加剂掺量为 2 .5 %。钢渣粉煤灰路面基层材料的长期强度介于水泥稳定碎石和二灰稳定碎石之间 ,可用于各等级公路基层底基层的修筑。回弹模量和其劈裂强度介于水泥稳定碎石和二灰稳定碎石之间 ,在路面设计时其回弹模量设计值为 130 0～ 170 0 MPa,劈裂抗拉强度设计值为 0 .5～ 0 .8MPa
At present, steel slag fly ash emissions, utilization is low, the use of steel slag fly ash as the base material can make extensive use of industrial waste, reduce the natural stone mining, is an ecological building materials. The ratio of steel slag fly ash was studied and the compaction performance of this material was studied. Steel slag content increased, the maximum dry density increased, the optimum moisture content decreased. The unconfined compressive strength as an index to optimize its ratio, that the best combination of inorganic binder for the steel slag: fly ash = 1: 1, admixture content of 2.5%. The long-term strength of steel slag fly ash pavement base material is between cement stabilized macadam and lime-flyash stabilized macadam, which can be used in the construction of subbase of grass-roots highway. The modulus of rebound and its splitting strength are between the cement stabilized macadam and lime-flyash stabilized macadam. The designed value of the rebound modulus is 130 0 ~ 170 0 MPa and the design value of splitting tensile strength 0 .5 ~ 0 .8 MPa