This paper investigates the factors that influence the strength and moisture damage resistance of foamed asphalt cold recycled mixtures. The relevant factors include gradation, asphalt penetration, mixing temperature, particle size of virgin aggregates, and the curing time and moisture content. Indirect tensile strength (ITS) tests under dry and wet conditions were conducted to evaluate the mixture properties. The test results indicated that minute variation in foaming parameters (i.e. expansion ratio and half-life) for asphalt binders with different penetration grades, had no significant effect on the strength and performance of foamed asphalt cold recycled mixtures. The results also revealed that the mixture with medium-grained gradation exhibited higher ITS than mixtures with coarse- and fine-grained gradation. As the temperature of the added virgin aggregates increased, the ITS and moisture damage resistance of the mixture increased as well, but the difference was quite small. It was also observed that the mixture demonstrated better ITS and moisture damage resistance when using filler in material design. The relationships between curing time, moisture content, and strength of the mixture during curing were also investigated, and the variations of strength formation was summarised. The significance of the studied factors was finally analysed using a one-way analysis of variance based on the test results.

本文研究了影响泡沫沥青冷再生混合料强度和耐湿损性的因素。相关因素包括级配、沥青渗透率、混合温度、原始骨料的粒度以及养护时间和水分含量。在干燥和潮湿条件下进行间接拉伸强度 (ITS) 测试以评估混合物性能。试验结果表明，不同渗透等级的沥青结合料的发泡参数（即膨胀率和半衰期）的微小变化，对泡沫沥青冷再生混合物的强度和性能没有显着影响。结果还表明，中粒级配的混合物比粗粒级和细粒级的混合物表现出更高的ITS。随着添加的原始骨料温度的升高，混合物的ITS和抗湿损性也有所提高，但差异很小。还观察到，当在材料设计中使用填料时，该混合物表现出更好的 ITS 和耐湿气损伤性。研究了固化时间、水分含量和混合物在固化过程中的强度之间的关系，并总结了强度形成的变化。最后根据检验结果采用单因素方差分析对所研究因素的显着性进行分析。还观察到，当在材料设计中使用填料时，该混合物表现出更好的 ITS 和耐湿气损伤性。研究了固化时间、水分含量和混合物在固化过程中的强度之间的关系，并总结了强度形成的变化。最后根据检验结果采用单因素方差分析对所研究因素的显着性进行分析。还观察到，当在材料设计中使用填料时，该混合物表现出更好的 ITS 和耐湿气损伤性。研究了固化时间、水分含量和混合物在固化过程中的强度之间的关系，并总结了强度形成的变化。最后根据检验结果采用单因素方差分析对所研究因素的显着性进行分析。