二灰稳定钢渣碎石基层材料沥青路面设计参数研究

A study on Pavement Design Parameters of Lime and Fly-ash Stabilized Steel-slag and Crushed-stone Base Course Materials

通过实验室试验,定量探讨了石灰粉煤灰(二灰)稳定钢渣碎石道路基层材料路面设计参数,即回弹模量与间接抗拉强度。试验结果与分析显示,在钢渣含量一定的情况下,二灰稳定钢渣碎石的抗压回弹模量和间接抗拉强度与混合料的级配类型有关,当钢渣:碎石为50∶50时,骨架密实型混合料的回弹模量与间接抗拉强度均较悬浮密实型混合料低10%左右。混合料的抗压回弹模量与间接抗拉强度均随钢渣在集料中的含量增加而增加,当钢渣含量从0%增加到100%时,骨架密实型混合料的抗压回弹模量增长为7.1%,而悬浮密实型混合料增幅达22.9%;骨架密实型混合料的间接抗拉强度增长为17.6%,而悬浮密实型混合料增幅达34.3%。

Through laboratory tests,this paper quantitatively discusses the pavement design parameters,i.e.,compressive resilient modulus and indirect tensile strength,of lime fly-ash（two ash） stability steel slag crushed stone road base course materials.Test results and the analysis revealed that in steel-slag content certain situation,the compressive resilient modulus and indirect tensile strength of two ash stabilized steel-slag crushed-stone are related to mixture gradation types,when steel-slag： crushed-stone is 50∶50,the compressive resilient modulus and indirect tensile strength of skeleton dense mixture were lower around 10% than suspended dense mixture.The compressive resilient modulus and indirect tensile strength of mixture increased with steel-slag content in the aggregate,when the steel-slag content increased from 0% to 100%,the compression resilient modulus of skeleton dense mixture growth of 7.1%,and suspended dense mixture increase of 22.9%;the indirect tensile strength of skeleton dense mixture increase for 17.6%,but suspended dense mixture increase of 34.3%.