Abstract
The major objective of this study is to evaluate the influence of Rynite Polyethylene terephthalate (RPET) particles on the mechanical properties of hot mix asphalt by conducting several tests such as; resilient modulus, dynamic creep and wheel tracking test. Various RPET contents namely; 3, 5 and 7% by weight of bitumen were added to asphalt mixture using wet method. From resilient modulus test, it was found that the stiffness of modified mixtures with RPET increased compared with unmodified asphalt mixture. The improvement of stiffness for intermediate and high temperatures was between 68 % for 3% of PET, while 3.88% for 7% PET respectively. The results of dynamic creep have shown a better improvement to rutting, the 3% of RPET showed the best resistance to permanent deformation compared to control sample. The results of wheel tracking test proved that the modification of asphalt mixture with RPET improved significantly the resist to permanent deformation (rutting). The addition of RPET has good performance in hot mix asphalt.
Highlights
Through the past decades by growing the demand of using a large amount of vehicles on roads, it could lead to huge damages which in various situations happened even prior service life of pavement [1]
Dynamic Creep Rutting is one of the most distress pavements, and it caused a permanent problem in asphalt mixtures, mainly in countries with high temperatures [21]
Repeated pulsed axial stress is applied to specimen mixture while the ensuing axial deformation is recorded using Linear Variable Displacement Transducers (LVDTs).The relationship between load cycles and permanent deformation was obtained by plotting data of the dynamic creep test as displayed in figure 4
Summary
Through the past decades by growing the demand of using a large amount of vehicles on roads, it could lead to huge damages which in various situations happened even prior service life of pavement [1]. Improvement of using polymer to asphalt mixture is the goal of designers and road engineers [2]. The demand for using waste plastic material has significantly increased because of the natural resources [4]. The benefit of using a waste plastic material as modifier additives with asphalt blended may have multiple environmental and economic advantages [5]. Based on the idea of Abreu, L.P [6], the recycling of waste materials are increasing and
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