YaBeSH Engineering and Technology Library

    • Journals
    • PaperQuest
    • YSE Standards
    • YaBeSH
    • Login
    View Item 
    •   YE&T Library
    • ASCE
    • Journal of Materials in Civil Engineering
    • View Item
    •   YE&T Library
    • ASCE
    • Journal of Materials in Civil Engineering
    • View Item
    • All Fields
    • Source Title
    • Year
    • Publisher
    • Title
    • Subject
    • Author
    • DOI
    • ISBN
    Advanced Search
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Archive

    Investigating the Effect of Degree of Blending on Performance of High RAP Content Mixtures

    Source: Journal of Materials in Civil Engineering:;2021:;Volume ( 033 ):;issue: 004::page 04021048-1
    Author:
    Hesham A. Ali
    ,
    Louay Mohammad
    ,
    Mojtaba Mohammadafzali
    ,
    Farshad Haddadi
    ,
    Moses Akentuna
    ,
    Greg Sholar
    ,
    Howard Moseley
    ,
    Wayne Rilko
    ,
    Cassady Allen
    DOI: 10.1061/(ASCE)MT.1943-5533.0003621
    Publisher: ASCE
    Abstract: The objective of this research was to investigate the effect of degree of blending on the rutting and fatigue performance of 100% reclaimed asphalt pavement (RAP) content mixtures. Recycled asphalt binders were extracted from the mixtures using a stage-extraction technique and evaluated. Five commercially available rejuvenators were evaluated based on a homogeneity index and the aging rate to select the best (RA1) and the worst (RA2) performing rejuvenator, respectively. Five mixtures were designed and tested at three aging levels to evaluate the selected rejuvenators. Mixtures were tested using the loaded wheel tester (LWT) and the Florida indirect tensile test (IDT) for high- and intermediate-temperature performance characterization, respectively. The LWT showed that the short-term aged recycled mix exhibited a better rutting resistance and less moisture susceptibility than the virgin mix when its high-temperature performance grade (HTPG) was 6°C higher than the virgin mix. However, the level of diffusion, as measured by the homogeneity index (Ih), did not seem to be a determining factor in moisture susceptibility or rutting depth. Also, the applied aging levels did not seem to affect the rut depths for RAP mixtures at lower rejuvenator dosage levels (RAP + 7.9% RA1 and RAP+6.5%RA2). IDT results showed that the virgin and 100% RAP mixtures exhibited average energy ratio (ER) values higher than the critical value of 1, indicating satisfactory crack initiation resistance behavior. Mixture R1 (100% RAP mixtures recycled with a low dose of RA1), with the highest Ih, exhibited the best cracking performance compared to the virgin mixture. It is recommended that cracking and rutting performance be plotted against the HTPG to determine the target HTPG of the recycled mix. The target HTPG of the recycled mix can then be obtained by adjusting the rejuvenator amount. In this research, the target HTPG of the recycled mix was 75°C or higher. It should be noted that this type of analysis is mix- and rejuvenator-specific and should be conducted during the mix design until a sufficient degree of confidence and familiarity with the rejuvenator is reached.
    • Download: (424.4Kb)
    • Show Full MetaData Hide Full MetaData
    • Get RIS
    • Item Order
    • Go To Publisher
    • Price: 5000 Rial
    • Statistics

      Investigating the Effect of Degree of Blending on Performance of High RAP Content Mixtures

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/4269927
    Collections
    • Journal of Materials in Civil Engineering

    Show full item record

    contributor authorHesham A. Ali
    contributor authorLouay Mohammad
    contributor authorMojtaba Mohammadafzali
    contributor authorFarshad Haddadi
    contributor authorMoses Akentuna
    contributor authorGreg Sholar
    contributor authorHoward Moseley
    contributor authorWayne Rilko
    contributor authorCassady Allen
    date accessioned2022-01-31T23:33:11Z
    date available2022-01-31T23:33:11Z
    date issued4/1/2021
    identifier other%28ASCE%29MT.1943-5533.0003621.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4269927
    description abstractThe objective of this research was to investigate the effect of degree of blending on the rutting and fatigue performance of 100% reclaimed asphalt pavement (RAP) content mixtures. Recycled asphalt binders were extracted from the mixtures using a stage-extraction technique and evaluated. Five commercially available rejuvenators were evaluated based on a homogeneity index and the aging rate to select the best (RA1) and the worst (RA2) performing rejuvenator, respectively. Five mixtures were designed and tested at three aging levels to evaluate the selected rejuvenators. Mixtures were tested using the loaded wheel tester (LWT) and the Florida indirect tensile test (IDT) for high- and intermediate-temperature performance characterization, respectively. The LWT showed that the short-term aged recycled mix exhibited a better rutting resistance and less moisture susceptibility than the virgin mix when its high-temperature performance grade (HTPG) was 6°C higher than the virgin mix. However, the level of diffusion, as measured by the homogeneity index (Ih), did not seem to be a determining factor in moisture susceptibility or rutting depth. Also, the applied aging levels did not seem to affect the rut depths for RAP mixtures at lower rejuvenator dosage levels (RAP + 7.9% RA1 and RAP+6.5%RA2). IDT results showed that the virgin and 100% RAP mixtures exhibited average energy ratio (ER) values higher than the critical value of 1, indicating satisfactory crack initiation resistance behavior. Mixture R1 (100% RAP mixtures recycled with a low dose of RA1), with the highest Ih, exhibited the best cracking performance compared to the virgin mixture. It is recommended that cracking and rutting performance be plotted against the HTPG to determine the target HTPG of the recycled mix. The target HTPG of the recycled mix can then be obtained by adjusting the rejuvenator amount. In this research, the target HTPG of the recycled mix was 75°C or higher. It should be noted that this type of analysis is mix- and rejuvenator-specific and should be conducted during the mix design until a sufficient degree of confidence and familiarity with the rejuvenator is reached.
    publisherASCE
    titleInvestigating the Effect of Degree of Blending on Performance of High RAP Content Mixtures
    typeJournal Paper
    journal volume33
    journal issue4
    journal titleJournal of Materials in Civil Engineering
    identifier doi10.1061/(ASCE)MT.1943-5533.0003621
    journal fristpage04021048-1
    journal lastpage04021048-9
    page9
    treeJournal of Materials in Civil Engineering:;2021:;Volume ( 033 ):;issue: 004
    contenttypeFulltext
    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian
     
    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian