The use of the recycled concrete aggregates (RCA) obtained from construction and demolition wastes not only reduces the demand for natural aggregate, which ultimately leads to economical and eco-friendly designs, but also improves the long-term performance of a conventional flexible pavement. This study aims to investigate the effects of using 100% RCA in the pavement subbase and base courses on the mechanical behavior of the flexible pavement. This study is divided into two stages, i.e., a laboratory study characterizing the properties of RCA and a numerical analysis evaluating the long-term performance of RCA under heavy traffic load conditions. In the laboratory study, along with the determination of the classical geotechnical properties of base and subbase samples, the stiffness properties of the samples were obtained by applying the resilient modulus test (RMT) and permanent deformation test (PDT). Then, by comparing the results of the three different constitutive models, the result of the more appropriate model was selected. In the second stage, the plastic deformation (rutting) of the pavement courses and the maximum value of deflection when subjected to multiple wheel loads were determined using a 3D nonlinear numerical method. Based on the experimental results, RCA demonstrated higher resilient modulus and lower plastic deformation compared to that of conventional base and subbase materials. Regarding the long-term behavior, the permanent strain rate of the samples was reduced at an approximately constant level during the first load cycles. Additionally, the numerical analysis results indicated that the mechanical performance and rutting values of the base and subbase courses constructed using 100% RCA met the specified requirements.

从建筑废料和拆除废料中获得的再生混凝土骨料（RCA）的使用不仅减少了对天然骨料的需求，最终导致了经济和环保的设计，而且还改善了传统柔性路面的长期性能。这项研究旨在调查在路面基层和基础层中使用100％RCA对柔性路面的机械性能的影响。这项研究分为两个阶段，即，表征RCA特性的实验室研究和评估在交通繁忙的情况下RCA长期性能的数值分析。在实验室研究中，以及确定基础和次基础样品的经典岩土特性的过程中，样品的刚度特性是通过应用弹性模量试验（RMT）和永久变形试验（PDT）获得的。然后，通过比较三种不同本构模型的结果，选择了更合适的模型的结果。在第二阶段，使用3D非线性数值方法确定人行道的塑性变形（车辙）和承受多个车轮载荷时的挠度最大值。根据实验结果，RCA与常规基础和次基础材料相比具有更高的弹性模量和更低的塑性变形。关于长期行为，样品的永久应变率在第一个载荷循环中以近似恒定的水平降低。此外，