PURPOSES : This study was conducted to compare and evaluate the compaction performance and physical properties of recycled asphalt mixtures by utilizing the characteristics of hot-mix asphalt mixtures and foamed asphalt.
METHODS : A wearing-course mixture was used for performance evaluations. Subsequently, dynamic shear rheometry (DSR), compaction performance, general physical properties, tensile strength ratio, and Hamburg wheel tracking were tested.
RESULTS : As a result of performance comparisons, compaction, and general physical properties satisfied the quality standards. In the Hamburg wheel tracking test, the mixture with the antistripping agent improved performance by approximately 40% compared with the general mixture. As the foamed asphalt binder was produced at a relatively low temperature compared with the general hot-mix asphalt binder, the penetration, viscosity, and DSR test results of the aged foamed asphalt binder showed that the aging of the asphalt binder was suppressed, and the flexibility increased. Therefore, the resistance to fatigue cracks is expected to be enhanced.
CONCLUSIONS : Even though the foamed warm-mix recycled asphalt mixture was produced at a temperature that was 20~30°C lower than the hot-mix asphalt mixture, its physical properties were similar to those of the hot-mix asphalt mixture; its use is expected to reduce the production of fuel and air pollutants.

ABSTRACT
1. 서론
    1.1. 연구배경
    1.2. 연구목적
2. 폼드 아스팔트 기술의 원리
3. 폼드 아스팔트 바인더의 특성
    3.1. 아스팔트 바인더 점도 감소
    3.2. 아스팔트 바인더 조기노화 억제
4. 배합설계
    4.1. 합성입도 도출
    4.2. 추정 아스팔트 함량 및 재생첨가제량 결정
    4.3. 최적 아스팔트 함량 및 박리방지제량 결정
5. 물성평가
    5.1. 다짐도
    5.2. 기본 물성 평가
    5.3. 인장강도비(Tensile Strength Ratio, TSR)
    5.4. 함부르크 휠트래킹 시험
    5.5. 노화된 아스팔트 바인더 물성 시험
6. 결론
REFERENCES

• 박상구((주)누보켐 책임연구원 · 인하대학교 토목공학과 박사과정) | Park Sang Gu
• 정진훈(인하대학교 공과대학 사회인프라공학과 교수) | Jeong Jin hoon Corresponding author