One of the most practical ways to reduce the demand for natural aggregates in the construction industry and dispose of the construction and demolition (C&D) wastes in landfills is using recycled concrete aggregate (RCA) for pavement base and subbase applications. Previous researches have mainly concentrated on the engineering behavior of C&D aggregates under ambient temperature. Little research has been directed toward the possible impact of temperature on the performance of rubberized recycled concrete aggregate for pavement base/subbase applications. In this study, for the first time, the effects of freeze–thaw process on the engineering properties of RCA containing crumb rubber for pavement base and subbase applications were evaluated. The results show that the resilient modulus of the RCA/rubber blends subjected to freeze–thaw cycles was higher than that of the control samples (prepared and tested at constant room temperature of 25 °C). The unconfined compressive strength (UCS) of F-T samples (subjected to one-day freezing, followed by one-day thawing) was slightly lower than that of the control samples. It was found that the UCS value of T-F samples (subjected to one-day thawing, followed by one-day freezing) was remarkably higher than that of the control samples. Based on the preliminary experimental results, the blends of RCA and crumb rubber, as a low carbon concept and an economically viable option, can be used for pavement base/subbase subjected to freeze–thaw cycles.

减少建筑业对天然骨料的需求并处置垃圾填埋场中的拆建（C＆D）废物的最实用方法之一是将再生混凝土骨料（RCA）用于路面基础和基底层应用。以前的研究主要集中在环境温度下拆建骨料的工程性能。很少有研究针对温度对路面基础/底基层应用的橡胶再生混凝土骨料性能的可能影响。在本研究中，首次评估了冻融工艺对用于路基和基层应用的含RCA的生胶的工程性能的影响。结果表明，经受冻融循环的RCA /橡胶共混物的弹性模量高于对照样品（在25°C的恒定室温下制备和测试）的弹性模量。FT样品的无侧限抗压强度（UCS）（需冷冻1天，然后融化1天）略低于对照样品。发现TF样品的UCS值（经过一天的解冻，然后是一天的冷冻）显着高于对照样品。根据初步的实验结果，RCA和碎橡胶的共混物，作为低碳概念和经济上可行的选择，可用于经受冻融循环的路面基层/底基层。FT样品的无侧限抗压强度（UCS）（需冷冻1天，然后融化1天）略低于对照样品。发现TF样品的UCS值（经过一天的解冻，然后是一天的冷冻）显着高于对照样品。根据初步的实验结果，RCA和碎橡胶的共混物，作为低碳概念和经济上可行的选择，可用于经受冻融循环的路面基层/底基层。FT样品的无侧限抗压强度（UCS）（需冷冻1天，然后融化1天）略低于对照样品。发现TF样品的UCS值（经过一天的解冻，然后是一天的冷冻）显着高于对照样品。根据初步的实验结果，RCA和碎橡胶的共混物，作为低碳概念和经济上可行的选择，可用于经受冻融循环的路面基层/底基层。其次是冷冻一天）明显高于对照样品。根据初步的实验结果，RCA和碎橡胶的共混物，作为低碳概念和经济上可行的选择，可用于经受冻融循环的路面基层/底基层。其次是冷冻一天）明显高于对照样品。根据初步的实验结果，RCA和碎橡胶的共混物，作为低碳概念和经济上可行的选择，可用于经受冻融循环的路面基层/底基层。