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RISS 인기검색어
- 검색키워드
- 저자 : Junan Shen (검색결과 3 건)
- 무료
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김성운,Junan Shen,김광우 한국아스팔트학회 2022 한국아스팔트학회지 Vol.12 No.2
The using of RAP (reclaimed asphalt pavement) in asphalt mixture is enhancing the strength due to the stiffness of RAP binder. In this study asphalt mix design was performed to determine the optimum asphalt content (OAC) of SMA mixture for RAP content of 15 and 30%. The rutting resistance and crack resistance of the SMA included the RAP were evaluated in laboratory test. Sample was prepared with OACs to measure volumetric properties, and the Indirect Tensile Strength (ITS) test, and Deformation Strength (SD) test were conducted at 25C and 60C, respectively.
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Sungun Kim,M. Myung Jeong,Junan Shen,Kwang W. Kim 한국도로학회 2018 한국도로학회 학술대회 발표논문 초록집 Vol.2018 No.05
The aged asphalt binder included in RAP due to the oxidative aging, repeated vehicle load, climate process affects to the recycled asphalt mixture property and performance (stripping, port hole and premature cracking initiation) after paving. The rejuvenator commonly is used to recover the aged binder in hot mix asphalt (HMA) containing RAP; the effect of rejuvenator in HMA had been proven according to many studies for over the past several decades. Also, there are many methods for using RAP in asphalt mixture in aspects of HMA, cold asphalt mixture (CMA) and worm mix asphalt mixture (WMA), and a foamed asphalt mixture is one of them. Employing the foamed asphalt manufacturing technology, the content of RAP in recycled asphalt mixture can be increased more. The objectives of this study are to evaluate of rejuvenator influence on foamed asphalt mixture using 100% RAP based on strength change of test sample and stiffness change of recovered binder from RAP and specimen. As the results, when rejuvenator was added to make foamed asphalt mixture, MS and ITS values decreased clearly as compared with the foamed asphalt mixture without rejuvenator use. The use of rejuvenator up to 6% showed a tendency of the decrease of strength and stability remarkably. The use of rejuvenator over 6% did not decrease the strength and stability. DSR test results, the use of rejuvenator in making a foamed asphalt mixture using 100% RAP showed a recovery effect of the foamed asphalt mixture. And recovered binder from the specimen that was made adding the 6, 12 and 18% rejuvenator showed lower stiffness obviously compared to the recovered binder from RAP adding same dosage of rejuvenator.
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