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    RECYCLED ASPHALT MIXTURES WITH FOAMED BITUMEN: AN ALTERNATIVE TO BUILD ECOFRIENDLY ROAD PAVEMENTS

    TitleRECYCLED ASPHALT MIXTURES WITH FOAMED BITUMEN: AN ALTERNATIVE TO BUILD ECOFRIENDLY ROAD PAVEMENTS
    Publication TypeCommunications in International Conferences
    Year of Publication2015
    AuthorsPalha D., Fonseca P., Silva H. M. R. D., Oliveira J. R. M., and Abreu L.
    Abstract

    Nowadays, recycling has become a very important objective for the society in the scope of a closed loop product life cycle. In recent years, new recycling techniques have been developed in the area of road pavements that allow the incorporation of high percentages of reclaimed asphalt (RA) materials in recycled asphalt mixtures. The use of foamed bitumen for production of recycled asphalt mixtures is one of those techniques, which also allows the reduction of the mixing temperatures (warm mix technology). However, it is important to evaluate if this solution can maintain or improve the performance of the resulting mixtures. Thus, the main aim of the present study is to assess the performance of warm recycled asphalt mixtures incorporating foamed bitumen as the new binder and 50% RA, in comparison with a control mixture using conventional bitumen. Four mixtures have been produced with 50% RA, one of them at typical high mixing temperatures with a conventional bitumen (control mixture) and the other three with foamed bitumen at different production temperatures. These four mixtures were tested to evaluate their compactability and water sensitivity. The laboratory test results showed that the production of recycled mixtures with foamed bitumen can be reduced by 40ºC without changing the performance of the resulting mixtures.

    Conference NameAECEF2015 Proceedings, 8TH Symposium
    Date Published2015-11-06
    Conference LocationUniversidade Porto – FEUP, Portugal
    KeywordsEnvironment, Foamed bitumen, Pavements, Recycling, Warm Mix Asphalt
    RightsopenAccess
    Peer reviewedyes
    Statuspublished
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    About CTAC

    The Centre for Territory, Environment and Construction (CTAC) is a research unit of the School of Engineering of University of Minho (UMinho), recognised by the “FCT – Fundação para a Ciência e Tecnologia” (Foundation for Science and Technology), associated to the Department of Civil Engineering (DEC), with whom it shares resources and namely human resources.

    Currently CTAC aggregates 25 researchers holding a PhD of which 20 are faculty professors of the Civil Engineering Department. Read more


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