The effects of using waste cooking oil as a rejuvenator on the properties of naturally aged asphalt binders

Yin Sheng, Yuhong Wang, Kecheng Zhao

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

The use of recycled asphalt pavement (RAP) material in hot mix asphalt (HMA) is an economic solution for reducing asphalt-containing waste. The change of asphalt binder properties in RAP, however, limits the percentage of RAP that can be used in the HMA. Studies based on laboratory-Aged asphalt binders show that waste cooking oil (WCO) can be potentially used as a rejuvenating agent. This paper investigates the effects of WCO on naturally aged asphalt binder extracted from a 29 year-old pavement in Hong Kong. Different percentages of WCO were blended with asphalt binder samples, and rheological properties were measured and compared by various indicators. The results show that the use of WCO softens and rejuvenates the naturally aged asphalt binder, although there is no significant difference between non-rejuvenated sample and that containing 3% WCO. The microscopic change of asphaltenes in the asphalt binder was examined by using transmission electron microscope (TEM). The results show that needle-shaped microstructures in the naturally aged samples were ruptured after adding WCO, implying that the oil has some "dissolving" effects on the aging product-Asphaltenes. ,.
Original languageEnglish
Title of host publication8th International Conference on Maintenance and Rehabilitation of Pavements, MAIREPAV 2016
PublisherResearch Publishing Services
Pages1116-1125
Number of pages10
ISBN (Electronic)9789811104497
DOIs
Publication statusPublished - 1 Jan 2016
Event8th International Conference on Maintenance and Rehabilitation of Pavements, MAIREPAV 2016 - Singapore, Singapore
Duration: 27 Jul 201629 Jul 2016

Conference

Conference8th International Conference on Maintenance and Rehabilitation of Pavements, MAIREPAV 2016
Country/TerritorySingapore
CitySingapore
Period27/07/1629/07/16

Keywords

  • Microstructure
  • Recycled asphalt pavement
  • Rejuvenation
  • Waste cooking oil

ASJC Scopus subject areas

  • Building and Construction
  • Civil and Structural Engineering

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