The application of reclaimed asphalt pavement (RAP) has become a common practice in road construction as a substitute to natural aggregate. The significance of RAP amount on the resilient modulus behavior, shear strength and hydraulic conductivity characteristics of unbound granular base materials were investigated in this research. RAP was blended with crushed aggregate by different percentages ranging from 0% to 100% by the blend weight. The laboratory testing program includes modified compaction, California Bearing Ratio (CBR), permeability, and repeated and static triaxial tests. A descriptive statistical analysis was conducted on all testing results. Furthermore, the X-ray computed tomography (CT) scanning technique was applied to investigate the internal (micro) structure of specimens. It was noted that with the addition of more RAP to the blend the resilient modulus increased and the coefficient of permeability decreased. The apparent cohesion of the RAP blends increased almost linearly and the friction angle decreased as the RAP replacement level increased. The CT scanning results indicated that the virgin crushed aggregate has a higher void ratio than the RAP blends, which interpreted the lower permeability and higher resilient modulus of RAP blends. In conclusion, blending RAP with virgin aggregate produces superior quality material for road bases.

再生沥青路面（RAP）的应用已成为公路建设中替代天然骨料的一种常见做法。研究了RAP用量对未结合颗粒状基材的弹性模量，剪切强度和水导率特性的意义。RAP与压碎的骨料按掺混物重量的0％至100％的不同百分比进行掺混。实验室测试程序包括修改后的压实，加利福尼亚承载比（CBR），渗透性以及重复和静态三轴测试。对所有测试结果进行描述性统计分析。此外，X射线计算机断层扫描（CT）扫描技术被应用于研究标本的内部（微观）结构。注意到随着向混合物中添加更多的RAP，弹性模量增加而渗透系数降低。RAP混合物的表观内聚力几乎呈线性增加，并且随着RAP替代量的增加，摩擦角减小。CT扫描结果表明，原始压碎的骨料比RAP共混物具有更高的空隙率，这解释了RAP共混物的较低的渗透性和较高的弹性模量。总之，将RAP与原始骨料混合可生产出路基优质的材料。CT扫描结果表明，原始压碎的骨料比RAP共混物具有更高的空隙率，这解释了RAP共混物的较低的渗透性和较高的弹性模量。总之，将RAP与原始骨料混合可生产出路基优质的材料。CT扫描结果表明，原始压碎的骨料比RAP共混物具有更高的空隙率，这解释了RAP共混物的较低的渗透性和较高的弹性模量。总之，将RAP与原始骨料混合可生产出路基优质的材料。