Rehabilitation or reconstruction of roadways produces a large amount of recycled asphalt pavement (RAP). Typically, RAP is often reused as a part of hot mix asphalt. However, the in situ utilization of RAP offers advantages such as reduction of construction cost and expedition of construction process. On the other hand, including considerable percentages of RAP as a fill material in the embankment of pavement structures may increase the risk of settlement. In this study the behavior of RAP samples from five sources in Illinois, two conventional soils, and a lab-produced mixture of soil and RAP is investigated. Gradations, moisture–density relationships, dynamic triaxial, direct shear and one-dimensional consolidation tests at various conditions were performed. Results show that an increase in the temperature of RAP during compaction significantly increased the maximum dry density (MDD). Also, the mixed sample of soil and RAP results in the highest standard Proctor MDD. Increase in temperature significantly increased the compression of RAP. Achieving good settlement performance for RAP is feasible if the RAP samples are screened to pass 1.5-in. sieve and if the compaction of the RAP samples reaches 100% of standard MDD. Based on the dynamic triaxial testing, deformation of RAP does not stabilize as soils do. To mitigate this issue, it is recommended not to use RAP within the influence zone of traffic load, specifically the top 5 ft of an embankment in a rigid pavement structure and within the top 8 ft of an embankment in a flexible pavement structure.


    Zugriff

    Download

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Laboratory Assessment of Recycled Asphalt Pavement as Roadway Embankment Material


    Weitere Titelangaben:

    Transportation Research Record: Journal of the Transportation Research Board


    Beteiligte:
    Barzegar, Mohammadreza (Autor:in) / Wen, Haifang (Autor:in) / Deniz Akin, Idil (Autor:in) / Edil, Tuncer (Autor:in)


    Erscheinungsdatum :

    02.02.2023




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Laboratory Evaluation of Recycled Asphalt Pavement Material in Warm-Mix Asphalt

    Malladi, Haritha / Kusam, Abhilash / Tayebali, Akhtarhusein A. | TIBKAT | 2020



    Laboratory Investigation of Mixing Hot-Mix Asphalt with Recycled Asphalt Pavement

    National Research Council (U.S.) | British Library Conference Proceedings | 2005



    Performance of Hot-Mix Asphalt Containing Recycled Asphalt Pavement

    Tran, Binh T. / Hassan, Rayya A. | Transportation Research Record | 2011