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2025 Vol.15, Issue 2 Preview Page

Scientific Paper

Serviceability properties of warm-mix recycled modified asphalt mixtures

중온 개질 순환 아스팔트 혼합물의 공용 특성 평가

Wonbae Kim1
,
Woohyun Kim2
,
Kyong K. Yun3
,
Kwang W. Kim4*
김 원배1
,
김 우현2
,
윤 경구3
,
김 광우4*
1Graduate Student, Civil Engineering Dept., Graduate School, Kangwon National University, Chuncheon, Korea
2Director, Research and Development Center, SI Corporation, Suncheon, Korea
3Professor, Civil Engineering Dept., Kangwon National University, Chuncheon, Korea.
4Professor Emeritus, Regional Infrastructure Engineering, Kangwon National University, Chuncheon, Korea
1강원대학교 대학원 토목공학과 박사과정
2에스아이 연구소장
3강원대학교 토목공학과 교수
4강원대학교 지역건설공학과 명예교수
*Corresponding Author
31 December 2025. pp. 330-343
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Abstract

In this study, the serviceability performance of a warm-mix recycled polymer-modified asphalt (WRPMA) mixture, which was produced at 150 ± 5°C using a PG76-22 warm-mix polymer-modified asphalt (WPMA) binder with a rejuvenator (RJ), was evaluated. A 30% of reclaimed asphalt pavement (RAP), heated indirectly to 110°C, virgin binder (WPMA+RJ) at 163 ± 5°C were mixed first, and new aggregates at 163 ± 5°C was added to the first blend and then mixed together in 2nd stage, which is called a stage mixing (SM) technique. A PG76-22 hot-mix PMA (HPMA) mixture was produced at 180 ± 5°C and a warm-mix PMA (WPMA) mixture without RAP was prepared at 150 ± 5°C using the same aggregate grade for comparison with the WRPMA mix. In comparison with the hot and warm mixes, the WRPMA mixes showed identical properties in deformation strength (SD), indirect tensile strength (ITS), tensile strength ratio (TSR) and dynamic stability (DS). The WRPMA mix satisfied the serviceability performance requirements for surface course of heavy vehicle highway pavement. This high performance is result of using the WPMA binder showing a low dynamic viscosity, adequate use of RJ based on GPC test on RAP binder aging, and application SM technique. The WRPMA mixes were used in a field pavement in a 1st class road. It was evaluated that the field pavement mixture showed somewhat lower values compared with the lab mix, but satisfied all the requirements for surface course of heavy vehicle highway pavement.

Keywords
Warm-mix
Recycle
Polymer-modified asphalt
Rejuvenator
SD
Wheel tracking
Indirect tensile strength
TSR
GPC
References
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2

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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 : 15
  • No :2
  • Pages :330-343
  • Received Date : 2025-12-19
  • Revised Date : 2025-12-29
  • Accepted Date : 2025-12-29
  • DOI :https://doi.org/10.22702/jkai.2025.15.2.29
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