Gupta Anik, Rodriguez-Hernandez Jorge, Castro-Fresno Daniel
GITECO Research Group, University of Cantabria, 39005 Santander, Spain.
Materials (Basel). 2019 Sep 27;12(19):3156. doi: 10.3390/ma12193156.
Despite the numerous benefits for preserving the hydrological cycle, permeable pavement systems (PPSs) found their major application in parking spots and for light traffic scenarios due to their limited durability and strength. To make the PPSs suitable for heavy traffic conditions without significant distresses, research is shifting toward the adoption of novel binders and additives for designing multifunctional porous asphalt mixtures which make up the surface course of PPSs. Certain additives are well known for enhancing the durability of dense graded asphalt mixtures and improving fatigue and rutting resistance. However, the studies on the influence of additives on abrasion resistance and binder draindown, which are the common problems in porous asphalt mixtures (PAMs), are still not well established. This paper summarizes best practices performed on PAMs and recommends possible future research directions for its improvement. Particular emphasis is placed on strength and resilience of PAMs by incorporating additives like nanosilica, crumb rubber, warm-mix additives, fibers (such as cellulose, glass, steel, and synthetic fibers), and some eco-friendly materials. It was found that different additives seem to have different effects on the properties of PAMs. Moreover, the combination of additives has synergistic benefits for the performance of PAMs, especially in urban pavements.
尽管透水路面系统（PPSs）对维持水文循环有诸多益处，但由于其耐久性和强度有限，主要应用于停车场和轻交通场景。为使PPSs适用于重交通条件且无明显病害，研究正转向采用新型粘结剂和添加剂来设计构成PPSs表面层的多功能多孔沥青混合料。某些添加剂因能提高密级配沥青混合料的耐久性以及改善抗疲劳和抗车辙性能而闻名。然而，关于添加剂对多孔沥青混合料（PAMs）常见问题——耐磨性和粘结料析漏的影响的研究仍不完善。本文总结了在PAMs上开展的最佳实践，并推荐了未来可能的改进研究方向。特别强调了通过掺入纳米二氧化硅、橡胶粉、温拌添加剂、纤维（如纤维素、玻璃、钢和合成纤维）以及一些环保材料等添加剂来提高PAMs的强度和韧性。研究发现，不同添加剂对PAMs的性能似乎有不同影响。此外，添加剂的组合对PAMs的性能具有协同效益，尤其是在城市路面中。
