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    Papers in International JournalsChapters/ Papers in International BooksChapters/ Papers in National BooksCommunications in International ConferencesCommunications in National ConferencesMSc ThesesBooksProceedingsPatentsTechnical/ Scientific ReportsPhD Theses
    @conference {2650,
    	title = {Assessment of performance related properties of asphalt rubber binder subjected to long-time digestion},
    	journal = {Rubberized Asphalt Rubber 2015 (RAR2015)},
    	year = {2015},
    	month = {2015-10-04 00:00:00},
    	address = {Las Vegas, NV, USA},
    	abstract = {

    The modification of asphalt with crumb rubber from scrap tires has been a successful technique to improve the performance of asphalt mixtures with improved performance for the rehabilitation of road pavements. The incorporation of crumb rubber into the asphalt can be done by the wet process or by the dry process using crumb rubber obtained from grinding at cryogenic temperature or from ambient temperature. The characteristics of the resulted modified asphalt depends on the properties of its components and external factors such as digestion time and temperature. In the continuous blend process, where the asphalt rubber is produced in the asphalt mixture plant, the digestion time is relatively short and the produced asphalt rubber is added to the asphalt mixture. The objective of this work is to study the importance of the digestion time in the characteristics of the modified binder by evaluating the penetration grade, softening point, resilience and viscosity. Two different conventional binders (penetration grade of 35/50 and 50/70) were modified with cryogenic and ambient crumb rubber with a mixing time up to 48 hours. During that time, 12 samples of each the asphalt rubber were obtained on 30 minutes of mixing time and at 1, 2, 3, 4, 5, 6, 7, 8, 24, 30 and 48 hours. This paper concluded that the digestion time is an important factor to take in consideration during the mixing process, since it has an important influence on the properties of the modified asphalt.

    }, keywords = {Asphalt rubber, Digestion time, Performance related tests}, author = {Pais, J. and Pereira, P. and Amorim, S. R.} }

    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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    Centro de Território, Ambiente e Construção
    Escola de Engenharia da Universidade do Minho
    Campus de Azurém
    4800-058 Guimarães, Portugal

    Phone: + 351 253 510 200 (517 206)
    Fax: + 351 253 510 217

    Email: geral@ctac.uminho.pt


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