Slabonski Pawel, Stankiewicz Beata, Beben Damian
Institute of Engineering Research Labor Aquila, 42-262 Poczesna, Poland.
Faculty of Civil Engineering and Architecture, Opole University of Technology, 45-061 Opole, Poland.
Materials (Basel). 2021 May 14;14(10):2567. doi: 10.3390/ma14102567.
The most technologically advanced form of road construction uses a high content of reclaimed asphalt pavement (RAP) as a component of its asphalt mixture (AM). However, there is a real problem with the effective interaction of RAP and MA. The research herein described presents an effective use of RAP originating from the recycling process of old pavements thanks to the application of an original rejuvenator. Two types of AM were designed concerning the base course of pavement as well as the wearing course and the binder course for various traffic categories. The achieved results show that the rejuvenator improved the homogenization of RAP with the asphalt binder and aggregate in each mixture type. On the basis of the research, the possibility of using paving AM with an increased content of RAP in lowered technological temperatures received a favorable assessment. Mixtures of asphalt concrete containing 40% RAP meet both Polish and German requirements for mixtures intended for heavy traffic pavements. Thanks to use of the rejuvenator, it is possible to compact AM layers containing RAP in a final compaction temperature lowered by about 20 °C. The achieved AM lab test results were confirmed on trial road sections. The rejuvenator used in tested AMs improved the homogenization of RAP with both binder and virgin aggregate. Moreover, the study proved that it is possible to use 20%, 40%, and even 100% RAP contents in the mixtures thanks to the use of the rejuvenator based on plant resin and the creation of conditions enabling the effective homogenization of AM components.
道路建设中技术最先进的形式是使用高含量的再生沥青路面（RAP）作为其沥青混合料（AM）的一个组成部分。然而，RAP与AM的有效相互作用存在一个实际问题。本文所述的研究展示了一种有效利用源自旧路面回收过程中的RAP的方法，这得益于一种新型再生剂的应用。针对路面基层、磨耗层以及适用于各类交通的粘结层，设计了两种类型的AM。所取得的结果表明，再生剂改善了每种混合料类型中RAP与沥青结合料及集料的均匀性。基于该研究，在较低工艺温度下使用含RAP量增加的铺路AM的可能性得到了积极评价。含有40%RAP的沥青混凝土混合料符合波兰和德国对用于重载交通路面混合料的要求。由于使用了再生剂，有可能在最终压实温度降低约20°C的情况下压实含RAP的AM层。在试验路段上证实了所取得的AM实验室测试结果。在所测试的AM中使用的再生剂改善了RAP与粘结剂和原生集料的均匀性。此外，该研究证明，由于使用了基于植物树脂的再生剂并创造了使AM组分有效均匀化的条件，在混合料中使用20%、40%甚至100%的RAP含量是可行的。
