Development of blending chart for different degrees of blending for reclaimed asphalt pavements in HMA

Prashant Shirodkar, Yusuf Mehta, Aaron Nolan, Khyati Sonpal, Eric Dubois

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    The demand to utilize higher percentages of reclaimed asphalt pavement (RAP) in the construction of hot mix asphalt (HMA) pavements continues to rise. Utilization of RAP in HMA is an environmentally friendly and cost effective method of recycling. At high percentage of RAP properties of RAP binder and its interaction with virgin binder plays critical role. Researchers have consistently shown that when RAP is mixed with virgin binder and aggregates, partial blending occurs, that is, something between 100% blending and the "black rock" effect occurs. Impact of partial blending on new virgin binder content is apparent which may cause under-asphalted mixture, resulting in poor pavement performance. Also influence of partial blending on final grade of RAP mix and allowable percentage of RAP has not been evaluated. The purpose of this paper is to develop the blending chart for different degree of blending to study the impact of partial blending on final grade of blended binder. To achieve the objective, blending chart for 100%, 70% and 50% RAP has been developed for PG 70-28 and PG 58-28 binder by carrying out binder study.

    Original languageEnglish (US)
    Title of host publicationRoad Pavement and Material Characterization, Modeling, and Maintenance - Proceedings of the 2011 GeoHunan International Conference
    Pages10-15
    Number of pages6
    Edition213 GSP
    DOIs
    StatePublished - Sep 21 2011
    Event2011 GeoHunan International Conference - Road Pavement and Material Characterization, Modeling, and Maintenance - Hunan, China
    Duration: Jun 9 2011Jun 11 2011

    Publication series

    NameGeotechnical Special Publication
    Number213 GSP
    ISSN (Print)0895-0563

    Other

    Other2011 GeoHunan International Conference - Road Pavement and Material Characterization, Modeling, and Maintenance
    Country/TerritoryChina
    CityHunan
    Period6/9/116/11/11

    All Science Journal Classification (ASJC) codes

    • Civil and Structural Engineering
    • Architecture
    • Building and Construction
    • Geotechnical Engineering and Engineering Geology

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