胶结料的粘附/粘聚失效诱发的剥落和松散是影响多孔沥青混合料（PAC）耐久性的重要因素。胶结料组成和分布的随机非均匀性、水-荷载的耦合效应使得实际路面PAC出现多种粘附/粘聚失效模式，失效机制尚不明确。本项目采用自行设计的拉拔试验和水-荷载耦合试验装置，分析PAC胶浆和砂浆的组成、厚度、水-荷载耦合效应等因素对其粘附/粘聚性能的影响规律，建立粘附/粘聚强度模型；基于高精度CT扫描和宏微观试验，研究PAC胶结料组成和分布的随机非均匀性及细观参数，构建考虑胶结料随机非均匀性和粘附/粘聚复合失效行为的细观有限元模型，研究粘附/粘聚失效行为的细观演化过程，分析胶结料的组成和分布、水-荷载耦合效应等因素对粘附/粘聚失效行为的影响规律，阐明粘附/粘聚失效机制，并提出胶结料的关键技术指标和组成设计方法。项目的研究成果，对提升PAC的耐久性和促进排水沥青路面的推广具有重要的理论和应用价值。

Ravelling and loosening caused by the adhesive/cohesive (Ad/Co) failure of binder (mastic and mortar) are the important factors that affecting the durability of porous asphalt mixtures (PAC). Multiple Ad/Co failure modes occurs in the field PAC due to the effects of the random-heterogeneity of binder composition and distribution, and the moisture-loads coupling effects (MLCE). The Ad/Co failure mechanism of PAC is still unclear. In this project, pull-off test and a moisture-loads coupling tester are designed to investigate the influences of binder composition, binder thickness, MLCE, and other factors on the Ad/Co performance of mastic and mortar, and Ad/Co strength models are established. Based on the techniques of high-resolution X-ray CT, macro- and micro experiments, the random-heterogeneity of binder composition and distribution, and the mesoscopic parameters were studied. A meso-scale finite element model was built, which takes the binder random-heterogeneity and composite Ad/Co failure behaviors into consideration. The mesoscopic evolution of Ad/Co failure behaviors are investigated, and the influences of binder composition, distribution, MLCE, and other factors on the failure behaviors were analyzed. Based on the results, the Ad/Co failure mechanism of PAC was illuminated, and the critical technical indicators and composition design method of binder were proposed. Results of this project have important theoretical and application values for improving the durability of PAC and promoting the popularization of drainage asphalt pavement.