Abstract: In order to analyze the factors of the pavement performance of the cement stabilized macadam mixture with iron tailings, the mechanical strength, water stability, frost resistance and fatigue resistance of cement stabilized macadam mixture compacted by the different iron tailing content (0%, 5%, 10%, 15%, 20%, 25%) and different mixing method(static mixing, vibration mixing) were researched. The results show that the iron tailings improve the unconfined compressive strength, indirect tensile strength, water stability and frost resistance of cement stabilized macadam mixture. When the content of iron tailings is 10%, the mechanical strength, water stability and frost resistance of the cement stabilized macadam mixture reach the maximum. When the content of iron tailings is 5%, the fatigue life of the cement stabilized macadam mixture reaches the longest. The samples prepared by the vibration mixing have higher strength, water stability, frost resistance, and fatigue resistance. At the same time, the cement hydration degree inside the mixture is higher, and the distribution of hydration products is more uniform, which reduces the risk of damage to the mixture due to stress concentration.

Key words: road engineering, iron tailing, cement stabilized macadam mixture, vibration mixing, static mixing, microscopic morphology