摘要：【中文】本发明公开了一种改良低液限粉土路基材料及其制备方法和应用，该路基材料通过在低液限粉土中增加碱激发材料，碱激发材料包括粉煤灰、钢渣、水泥和NaOH溶液；该路基材料将碱激发剂加入至路基材料中，碱激发剂具有耐低温，抗冻融循环能力强，抗渗性好等特点，而且还能保证强度符合要求；采用的钢渣和粉煤灰均为工业的废料，价格便宜，可以降低工程成本，本发明的耐低温，抗渗性好，抗冻融循环能力强。 【EN】The invention discloses an improved low liquid limit silt roadbed material and a preparation method and application thereof, wherein the roadbed material is prepared by adding an alkali-activated material into low liquid limit silt, wherein the alkali-activated material comprises fly ash, steel slag, cement and NaOH solution; the roadbed material is added with the alkali activator, and the alkali activator has the characteristics of low temperature resistance, strong freeze-thaw cycle resistance, good impermeability and the like, and can ensure that the strength meets the requirement; the steel slag and the fly ash are industrial waste materials, are low in price, can reduce engineering cost, and have the advantages of low temperature resistance, good impermeability and strong freeze-thaw cycle resistance.