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. 2021 May 24;14(11):2781.
doi: 10.3390/ma14112781.

Mechanical Performance of Reclaimed Asphalt Pavement Modified with Waste Frying Oil and Crumb Rubber

Munder Bilema  1 , Mohamad Yusri Aman  1 , Norhidayah Abdul Hassan  2 , Zubair Ahmed Memon  3 , Hend Ali Omar  4 , Nur Izzi Md Yusoff  5 , Abdalrhman Milad  5
Affiliations

Mechanical Performance of Reclaimed Asphalt Pavement Modified with Waste Frying Oil and Crumb Rubber

Munder Bilema et al. Materials (Basel). .

Abstract

Researchers are exploring the utilisation of reclaimed asphalt pavement (RAP) as a recycled material to determine the performance of non-renewable natural aggregates and other road products such as asphalt binder, in the construction and rehabilitation stage of asphalt pavements. The addition of RAP in asphalt mixtures is a complex process and there is a need to understand the design of the asphalt mixture. Some of the problems associated with adding RAP to asphalt mixtures are moisture damage and cracking damage caused by poor adhesion between the aggregates and asphalt binder. There is a need to add rejuvenators to the recycled mixture containing RAP to enhance its performance, excepting the rutting resistance. This study sought to improve asphalt mixture performance and mechanism by adding waste frying oil (WFO) and crumb rubber (CR) to 25 and 40% of the RAP content. Moreover, the utilisation of CR and WFO improved pavement sustainability and rutting performance. In addition, this study prepared five asphalt mixture samples and compared their stiffness, moisture damage and rutting resistance with the virgin asphalt. The results showed enhanced stiffness and rutting resistance of the RAP but lower moisture resistance. The addition of WFO and CR restored the RAP properties and produced rutting resistance, moisture damage and stiffness, which were comparable to the virgin asphalt mixture. All waste and virgin materials produce homogeneous asphalt mixtures, which influence the asphalt mixture performance. The addition of a high amount of WFO and a small amount of CR enhanced pavement sustainability and rutting performance.

Keywords: RAP; crumb rubber; mechanical performance; moisture damage; recycling; rejuvenator; rutting resistance; waste frying oil.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
The effect of the heating time on the RAP moisture content.
Figure 2
Figure 2
ITS for the virgin, RAP and recycled asphalt mixture at 25 °C.
Figure 3
Figure 3
TSR for the virgin, RAP, and recycled asphalt mixtures.
Figure 4
Figure 4
Resilient modulus of the virgin asphalt, RAP and the recycled asphalt mixture at different temperatures.
Figure 5
Figure 5
The permanent deformation of all samples at 40 °C.
Figure 6
Figure 6
The rutting of all samples at 45 and 60 °C.
See this image and copyright information in PMC

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