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논문 기본 정보

자료유형
학술저널
저자정보
김영민 (Korea Institute of Civil Engineering and Building Technology) 임정혁 (Korea Institute of Civil Engineering and Building Technology) 황성도 (Korea Institute of Civil Engineering and Building Technology) 정규동 (Korea Institute of Civil Engineering and Building Technology) 이석근 (Kyung Hee University)
저널정보
한국도로학회 한국도로학회논문집 한국도로학회논문집 제17권 제6호
발행연도
2015.1
수록면
55 - 63 (9page)

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초록· 키워드

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PURPOSES : The objective of this study is to investigate the properties of recycled asphalt binders with five different rejuvenators, in order to evaluate the applicability of the recycled asphalt binders compared with the original asphalt binder. METHODS : In order to simulate recycled asphalt binders, fresh asphalt binders are aged by various Superpave aging procedures, such as the rolling thin-film oven (RTFO) and the pressure aging vessel (PAV). Then, selected rejuvenators are added to the aged asphalt binders in the amount of 5%, 10%, and 15%. The asphalt binder properties are evaluated by the dynamic shear rheometer (DSR), the rotational viscometer (RV), and the bending beam rheometer (BBR). In this study, AP-5 (penetration grade 60-80, PG 64-16) asphalt binder is used. A total of five types of rejuvenators are employed. RESULTS AND CONCLUSIONS : When considering aged asphalt without a new asphalt binder, it seems that the percentage of rejuvenator used in Korea is a bit too low, and that it fails to possess the characteristics of the original binder. From the current practice of evaluating the properties of recycled binder based on penetration ratio only, the amount of rejuvenator required is similar for the long-term-aged binder, but is excessive for the longest-term aged binder, causing deterioration of workability and stiffness of the recycled binder.

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