To characterize highly modified asphalt binders under high temperatures, this paper presents an alternative that uses the incremental repeated load permanent deformation (iRLPD) test in lieu of the multiple stress creep recovery (MSCR) test. The rationale for the iRLPD test includes a reduced loading time that better correlates with field-loading conditions, decreased variability of results, and an improved estimation of highly modified binder behavior. Moreover, an iRLPD high-temperature model for the highly modified binder is presented; this model is also correlated to the iRLPD traffic model to provide traffic estimates through the use of the iRLPD mixture parameter. Laboratory results indicate that as the level of binder modification increases, MSCR underestimates the strain response that can lead to overestimation of traffic levels. The study also illustrates the effect of the stress–strain nonlinearity parameter, which increases as the level of binder modification increases. The difference in the permanent strain and recovery response from the two methods is exacerbated by the level of binder modification; however, for neat binders, the MSCR and iRLPD strain ratio approaches unity. The results demonstrate that the permanent strain of polymer modified binder is highly time dependent and thus the loading time for testing asphalt binders should be properly selected. The LTPPBind software seems to underestimate the traffic levels calculated from the iRLPD and MSCR models; nevertheless, the results of iRLPD and LTPPBind are in agreement, insinuating that the LTPPBind model underpredicts the traffic level for neat binders, whereas the MSCR model overpredicts the traffic level for highly modified binders.


    Access

    Download

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    High-Temperature Characterization of Highly Modified Asphalt Binders and Mixtures


    Additional title:

    Transportation Research Record: Journal of the Transportation Research Board


    Contributors:


    Publication date :

    2014-01-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Asphalt Mixtures Containing Chemically Modified Binders

    Stuart, Kevin D. | Online Contents | 1993



    Performance evaluation of REOB-modified asphalt binders and mixtures

    Li, Xinjun / Gibson, Nelson / Andriescu, Adrian et al. | British Library Online Contents | 2017


    State of the Practice for High Polymer-Modified Asphalt Binders and Mixtures

    Habbouche, Jhony / Boz, Ilker / Diefenderfer, Brian K. et al. | Transportation Research Record | 2021


    Experimental and numerical investigation of low-temperature performance of modified asphalt binders and mixtures

    Jahanbakhsh, H. / Karimi, Mohammad M. / Tabatabaee, Nader | British Library Online Contents | 2017