Asphalt concrete is widely known to be a self-healing material, by repeated loading the micro-cracks have appearing and disappeared when both faces of fissure touch. This process applied until crack completely gone material regains its prior resistance. In this study, two strategies are presented boost healing rate in porous asphalt, one them induction heating. method used mixing 1.1% steel woo...

This doctoral thesis consists of a literature review, presented in two papers, and another six papers describing experimental studies of the influence of different kinds of wax and polyphosporic acid on bitumen and asphalt concrete mixture properties. The literature review should give an extensive description of the field of knowledge concerning wax in bitumen. Effects of wax in crude oil, bitu...

The design parameters are one of the important factors to ensure quality asphalt pavement design. In “Highway Asphalt Pavement Design Specification” (JTGD50-2017), stander China, used mixture anti-pressure resilience modulus at a single temperature 20 ℃ as metrics. However, mixture, sticky-bullet plastic material, shows different mechanical properties temperatures. China is vast territory, and ...

More than 60% of the Dutch motorways are covered with a porous asphalt wearing course (PA). In spite of many advantages of PA its lifespan is mostly short which causes high maintenance costs. Lifespan of PA is defined by its main damage being raveling. The main factors which cause raveling are asphalt construction/mixture and environmental factors. Therefore it is important to determine to what...

A review of several past studies clearly shows the effect of reduced air voids on improved fatigue and rutting performance of asphalt mixtures, both in the laboratory and field. Depending on mix type and experiment (which included constant-stress bending beam fatigue testing and field results from WesTrack), fatigue performance improved between 8.2 and 43.8% with a 1% decrease in air voids. Lik...