PURPOSES : Asphalt pavements are damaged by various causes, such as cracks, potholes due to climate, and traffic environment. Asphalt aging has a significant effect on cracks, which may also form potholes. The purposes of this study are to estimate the change in asphalt binder and mixture performance and to correlate the physicochemical changes of the asphalt binder and mixture performance with aging.
METHODS : The aging process of the asphalt was determined in the laboratory, based on the methods used in previous studies. In terms of consistency (stiffness), crack-resistance performance, moisture susceptibility, SK investigated the binder part, and Shoreki investigated the mixture part depending on the aging time.
RESULTS : The consistency (stiffness) and brittleness of both the asphalt binder and mixture tended to increase with aging. In particular, the crack-resistance performance of the asphalt binder (G*sinδ, ductility, and ΔTc) and mixture (flexural fatigue test and Cantabro test) deteriorated because of asphalt aging. Furthermore, the aging mechanisms (oxidation and polymerization) were identified based on the chemical structure analysis.
CONCLUSIONS : It is confirmed that the aging affected the chemical composition change and the physical properties of the asphalt. Asphalt pavements are significantly affected by the aging characteristics of the binder. It is concluded that the crack-resistance performance of the mixture decreases with aging due to these physical and chemical changes.

ABSTRACT
1. 서론
2. 재료 및 노화모사 방법
    2.1. 아스팔트 바인더
    2.2. 아스팔트 혼합물
3. 노화에 따른 물리적 물성변화
    3.1. 바인더 물성
    3.2. 혼합물 물성평가
4. 노화에 따른 화학적 특성변화
    4.1. 산화작용(Oxidation)
    4.2. 휘발작용(Evaporation)
    4.3. 중합반응(Polymerization)
5. 요약 및 결론
REFERENCES

• 이백운(SK이노베이션) | Lee Beak Woon
• 황의윤(SK이노베이션) | Hwang Eui Yoon (SK Innovation Institute of technology innovation) 교신저자
• Hiroki Hosono(Showa Rekisei Industries R&D Group Manager)
• Makoto Hiramatsu(Showa Rekisei Industries R&D Group Leader)