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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
- 언어KOR
- URLhttps://db.koreascholar.com/Article/Detail/411361
pp.129-136
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.
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
