为了研究寒区低温养生温度对水泥稳定碎石混合料力学性能、疲劳特性与抗冻性能的劣化影响规律。采用5、10、15 ℃模拟现场低温养生条件，基于力学性能试验、三分点加载疲劳试验和冻融循环试验对比分析低温养生、20 ℃标准养生和30 ℃养生条件下水泥稳定碎石混合料的无侧限抗压强度、弯拉强度、动态回弹模量及抗疲劳性能与抗冻耐久性能差异，研究了养生温度对冻融循环试验过程中水泥稳定碎石混合料微细观空隙结构衰减规律的影响，建立了水泥稳定碎石混合料微细观空隙结构与力学性能和疲劳性能的相关性。结果表明，相较于标准养生温度（20 ℃），5~10 ℃养生条件下，水泥稳定碎石混合料的力学性能下降幅度可达20%~40%，疲劳寿命降低了40%~50%，低温养生对水泥稳定碎石混合料力学性能、疲劳特性和抗冻性能有显著劣化影响，且养生温度越低，水泥稳定碎石混合料力学性能和疲劳特性下降幅度越大；提高养生温度有助于降低冻融循环后微细观空隙直径衰减速率，增加冻融循环试验过程中水泥稳定碎石混合料空隙结构的稳定和细化微细观空隙结构，从而增加了水泥稳定碎石混合料的力学性能、抗疲劳耐久性能与抗冻性。

In order to study the effect of low temperature on mechanical properties, fatigue properties and frost resistance of cement stabilized crushed stone mixture in cold area. Using 5 ℃, 10 ℃, 15 ℃ to simulate the field low temperature curing condition, based on the mechanical properties test, three-point loading fatigue test and freeze-thaw cycle test, the differences of unconfined compressive strength, flexural tensile strength, dynamic resilience modulus, fatigue resistance and anti-freezing durability of cement stabilized gravel mixture under low temperature curing condition, 20 ℃ standard curing condition and 30 ℃ curing condition were compared. The effect of curing temperature on the attenuation law of microvoid structure of cement-stabilized crushed stone mixture during freeze-thaw cycle test was studied. The results show that, compared with the standard curing temperature (20 ℃), the mechanical properties of cement stabilized macadam mixture decrease by 20% ~ 40% and the fatigue life decrease by 40% ~ 50% under the condition of 5 ~ 10℃. Low temperature curing has a significant deterioration effect on the mechanical properties, fatigue properties and anti-freezing properties of cement stabilized macadam mixture. The greater the decrease of mechanical properties and fatigue characteristics of cement stabilized crushed stone mixture. Increasing the curing temperature is helpful to reduce the decay rate of micro void diameter after freeze-thaw cycle, increase the stability of the void structure of cement stabilized gravel mixture and refine the micro void structure during the freeze-thaw cycle test, and thus increase the mechanical properties, fatigue durability and frost resistance of cement stabilized gravel mixture.