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Djoko Widayat
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Civil Engineering, Building, Construction & Architecture

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HUBUNGAN PARAMETER KUAT TARIK TAK LANGSUNG TERHADAP MODULUS RESILIEN CAMPURAN BERASPAL DINGIN DENGAN ASPAL BUSA Djoko Widayat
Jurnal Jalan-Jembatan Vol 27 No 2 (2010)
Publisher : Direktorat Bina Teknik Jalan dan Jembatan

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Cold mix recycling with foamed bitumen is a technology alternative which can be implemented in selecting treatment strategy for road rehabilitation project. This construction is an environment friendly and can reduce air emission on road project. Mix material can consist of Reclaimed Asphait Pavement (RAP), virgin aggregate with or without cement addition.The criteria of recycling with foamed bitumen mixture based on value of Indirect Tensile Strength (ITS), Tensile Strength Ratio (TSR) and Unconfined Compressive Strength (UCS). Whereas the mix stiffness is based on Resilient Modulus (MR). The value of ITS and MR is influenced by laboratory testing or field temperature. The result form some specimens which were tested in some temperature variotions shows that the increased of test temperature, the ITS and MR decreased. There is significantly fair correlation between two parameters MR and ITS in power regression type. This prediction can be used as a guide to determine coefficient layer in pavement thickness design. Key word : cold mix recyling, foamed bitumen, RAP, ITS, Resilient Modulus, coefficient layer
PENGGUNAAN FOAM BITUMEN UNTUK DAUR ULANG PERKERASAN JALAN R. Anwar Yamin; Djoko Widayat
Jurnal Jalan-Jembatan Vol 25 No 2 (2008)
Publisher : Direktorat Bina Teknik Jalan dan Jembatan

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Restoration of pavement failure was usually done by repairing the damaged segments, by improving pavement structural capacity, by overlaid or by demolished the existing asphalted layer followed by repairing and adding a base layer and followed by overlaid a new asphaltic layer as its surfacing. All of those activities needs fresh materials and can change pavement elevation. Repairing and improving structural capacity of pavement by reused (recycling) the existing pavement materials may be a solution that could be done. A number of materials type can be used either for repairing or for improving the quality of recycling materials, one of them are foam bitumen. Foam bitumen is a mixture of bitumen, water and air in a certain proportion. Foam bitumen produced by injecting water into hot bitumen in the foaming chamber. Foam bitumen can be used as a stabilizer for all type of materials including recycling pavement materials. The use of foam bitumen should be combined with the active filler (cement or lime) in the recycling pavement materials. There were many factors affect the successful in making the recycling by used of foam bitumen. This paper tried to give a description of foam bitumen characteristics, factors affecting in making foam bitumen, the type of materials that can be recycled by foam bitumen, the laboratory and field performance of recycled pavement materials. Key Words: Foam bitumen, stabilizer recycling laboratory and field performance
Co-Authors R. Anwar Yamin