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2024 Vol.14, Issue 2 Preview Page

Scientific Paper

Rut characteristics of open-graded friction course (OGFC) asphalt mixtures

개립마찰포장용 아스팔트 혼합물의 소성변형 특성연구

Wonbae Kim1
,
Jaewon Jo2
,
Kwang W. Kim3*
김 원배1
,
조 재원2
,
김 광우3*
1Graduate Student, Civil Engineering Dept., Graduate School, Kangwon National University
2Researcher, Korea Conformity Laboratories, Gyeonggi Gangwon Center
3Professor Emeritus, Regional Infrastructure Engineering Dept., Kangwon National University
1강원대학교 대학원 토목공학과 박사과정
2KCL 경기강원센터 연구원
3강원대학교 지역건설공학과 명예교수
*Corresponding Author
31 December 2024. pp. 314-323
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Abstract

The objective of this study was to evaluate rut resistance characteristics of open-graded friction course (OGFC) asphalt mixtures. Two maximum size aggregates (10 mm and 13 mm) with three polymer-modified asphalt mixtures were used to prepare OGFC asphalt mixtures for the strength against deformation (SD) and asphalt pavement analyser (APA) tests. Three polymers included LDPE (low-density polyethylene), CRM (crumb rubber modifier) and SBS (styrene-butadiene-styrene). Six OGFC mix specimens were prepared at optimum asphalt content with the air void ratio of 16.2~17.3% using gyratory compactor. The SD test results showed that LDPE mixes showed approximately 4.2 MPa on average, while CRM and SBS mixes showed 3.6 MPa and 2.7 MPa, on average, respectively. APA test results was similar to those of SD; rut depths of LDPE, CRM and SBS mixtures being 1.35 mm, 3.5 mm, and 4.2 mm, on average, respectively. Therefore, the OGFC mixes using LDPE was found to show strong rut resistance properties in both tests, although SD was slightly lower than 4.25 MPa, which is the minimum limit of 1st class highway dense-grade asphalt pavement in Korea. Since OGFC specimen has air void ratio of 16-17%, which is 4 times greater than dense-grade specimen, instead of applying the dense-grade property limit directly to OGFC, it is suggested to prepare reasonable limits for OGFC mixes in the future. The regression analysis between APA rut depth and SD showed that the two properties has relatively high correlation with R2 > 0.81. Therefore, it will be possible to use SD for estimation for OGFC rut resistance by SD after further studies.

Keywords
Open-graded friction course
OGFC
SBS
LDPE
CRM
deformation strength
SD
APA
References
1

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2

Bibek, T., Kim, Y., Kim, S., Kim, W. and Kim, KW. (2020). "Correlation of deformation strength with rut resistance, tensile strength and Marshall stability of asphalt mixtures", Proceedings, International Symposium of Advanced Technologies in Asphalt Pavement (ATAP 2020), Chuncheon, Republic of the Korea, June 11, pp. 39-42.

3

CALTRANS (2020). "Open graded friction course", Design Guidance, HQ Division of Design, California Department of Transportation.

4

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6

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7

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9

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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 : 14
  • No :2
  • Pages :314-323
  • Received Date : 2024-12-17
  • Revised Date : 2024-12-24
  • Accepted Date : 2024-12-31
  • DOI :https://doi.org/10.22702/jkai.2024.14.2.29
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