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순환골재 추출입도 품질관리를 통한 순환 아스팔트 혼합물 성능향상 연구 KCI 등재

Performance Improvement of Recycled Asphalt Pavements via Quality Control of Extracted RAP Aggregate Gradation

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한국도로학회논문집 (International journal of highway engineering)
한국도로학회 (Korean Society of Road Engineers)
초록

PURPOSES : The purpose of this study is to identify a gradation control method that minimizes the volatility of recycled aggregates to maintain the quality of reclaimed asphalt mixtures. METHODS : In this study, two types (0~13 and 0~10 mm) of recycled aggregate stockpiles with an extraction viscosity of 40,000 poise and a 19 mm hot asphalt mixture with virgin aggregates are used. The test methods are evaluated for plastic deformation resistance using the Hamburg wheel-tracking test and for low-temperature crack resistance using the dynamic modulus test. In the field, the performance is evaluated via an accelerated pavement test.
RESULTS : The Hamburg wheel-tracking test shows good water resistance as well as less than 5 mm of deformation. The result of a dynamic modulus test at -5 °C shows a 92.9% low-temperature crack resistance as compared with that of the 19 mm dense grade hot-mix asphalt mixture. The result of the accelerated pavement test confirms that the performances of the 19 mm dense grade hot-mix asphalt mixture and reclaimed asphalt mixture are equal owing a 1.2 cm plastic deformation.
CONCLUSIONS : By evaluating the plastic deformation resistance and crack resistance of the reclaimed asphalt mixture based on a stockpile gradation controlled at 0~10 mm via an indoor test, it is discovered that the plastic deformation resistance increases partially, whereas the crack resistance remains almost unchanged. The accelerated pavement test confirms that a performance equivalent to that of a 19 mm dense grade hot-mix asphalt mixture is achieved.

목차
ABSTRACT
1. 서론
    1.1. 연구의 배경
    1.2. 연구의 목적
2. 순환골재 입도관리 방안 분석
    2.1. 순환골재 관리기준 분석 및 문제점 도출
    2.2. 순환골재 입도 개선 방안
3. 배합설계 및 혼합물 실내 공용성 평가
    3.1. 배합설계
    3.2. 함부르크 휠트래킹 시험
    3.3. 동탄성계수 시험
4. 실물포장 가속시험 활용 공용성능 검증
5. 결론
REFERENCES
저자
  • 안진홍(경희대학교 사회기반시스템공학과) | An Jinhong
  • 백종은(서울특별시 도로관리과 포장조사평가팀) | Baek Jongeun
  • 함상민(서울특별시 도로관리과 포장조사평가팀) | Ham Sangmin
  • 황성도(한국건설기술연구원 도로교통연구본부) | Hwang Sung Do
  • 김영민(한국건설기술연구원 도로교통연구본부) | Kim Yeongmin (Department of Highway & Transportation Research, Korea Institute of Civil Engineering and Building Technology) 교신저자