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2020 Vol.10, Issue 1 Preview Page

Scientific Paper

Rejuvenation effect of particular WMA additive for warm-mix asphalt recycle

RAP 재활용시 특정 WMA 첨가제의 노화회생효과

Kyeong-Jin Kim1
,
Yeong-Sam Kim2
,
Kwang Woo Kim3
,
Sungun Kim4*
김 경진1
,
김 영삼2
,
김 광우3
,
김 성운4*
1Professor, Division of Civil, Environmental & Urban-Transportation Engineering, Korea National University of Transportation
2Doctorate Completion, Department of Regional Infrastructures Engineering, Kangwon National University
3Professor Emeritus, Department of Regional Infrastructures Engineering, Kangwon National University
4Lecturer, Department of Regional Infrastructures Engineering, Kangwon National University
1한국교통대학교 토목공학과 교수
2강원대학교 지역건설공학과 박사수료
3강원대학교 지역건설공학과 명예교수
4강원대학교 지역건설공학과 전임강사
* Corresponding Author
30 June 2020. pp. 54-62
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Abstract

This study evaluated possibility of using warm-mix asphalt (WMA) additives for recycling recovered binder using normal virgin binder based on absolute viscosity, kinematic viscosity, penetration and the large molecular size (LMS). The recovered binder by Abson method from various reclaimed asphalt pavements (RAP) was dissolved into virgin binder by weight of 20% and 30% of total binder and WMA additives were added to make recycled WMA binder. Two types of WMA additives, Evotherm (EV) and Sasobit (SA), and a virgin binder, PG58-22, were used. It was found that EV was effective, but SA was not. The results indicated that EV reduced LMS and viscosity and increased penetration of the recycled binder by adding 0.3, 0.5 and 0.7 wt% in 20% and 30% recycled binders. EV could be used for recycle up to 30% of the recovered binder without using rejuvenator at 135°C and 115°C. Therefore, according to this study results, it was concluded that the additive EV could be efficiently used for WMA recycle without using rejuvenator.

Keywords
WMA additive
RAP
kinematic viscosity
penetration
large molecular size
Abson method
recycled WMA binder
References
1
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10.1007/s12205-009-0161-1
2
Doh, Y.S., Kim, J.C., Yoo, M.Y. and Kim, K.W. (2010). "Evaluation of selected warm-mix additives for asphalt recycle", Paper presented at 2010 TRB Meeting, Washington, DC, Jan. 2010.
3
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4
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5
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6
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8
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Information
  • Publisher :KOREAN ASPHALT INSTITUTE
  • Publisher(Ko) :한국아스팔트학회
  • Journal Title :Journal of the Korean Asphalt Institute
  • Journal Title(Ko) :한국아스팔트학회지
  • Volume : 10
  • No :1
  • Pages :54-62
  • Received Date : 2020-05-29
  • Revised Date : 2020-06-18
  • Accepted Date : 2020-06-22
  • DOI :https://doi.org/10.22702/jkai.2020.10.1.005
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