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    Elastic Modulus Prediction of Asphalt Concrete

    Source: Journal of Materials in Civil Engineering:;1999:;Volume ( 011 ):;issue: 003
    Author:
    Guoqiang Li
    ,
    Yongqi Li
    ,
    J. B. Metcalf
    ,
    Su-Seng Pang
    DOI: 10.1061/(ASCE)0899-1561(1999)11:3(236)
    Publisher: American Society of Civil Engineers
    Abstract: The distresses of asphalt pavement, which include fatigue, rutting, and low temperature cracking, are related to the elastic modulus of asphalt concrete (AC). In addition, the elastic modulus of AC is a design variable for asphalt pavement structural design when elastic-layer system theory is employed. However, in the most commonly used AC design methods (the Marshall, Hveem, and Superpave methods), the elastic modulus is not used as a control variable. Therefore, these design methods do not ensure that the desired elastic modulus of AC will be obtained. In this paper, AC is treated as a two-phase composite with aggregates dispersed in the asphalt matrix. Based on this treatment, a two-layer built-in micromechanical model of AC is developed by embedding an asphalt-coated circular aggregate into an equivalent AC medium. Using this model, an equation predicting the elastic modulus of AC is derived. The elastic modulus of AC predicted by the present model is compared with the Hashin and Shtrikman theoretical bounds and the Heukelom and Klomp equation. Using these comparisons, the proposed model is shown to be reasonable and applicable for predicting the elastic modulus of AC. Thus, the existing mix design approaches can be improved by using the modulus prediction model presented in this paper.
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      Elastic Modulus Prediction of Asphalt Concrete

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    contributor authorGuoqiang Li
    contributor authorYongqi Li
    contributor authorJ. B. Metcalf
    contributor authorSu-Seng Pang
    date accessioned2017-05-08T21:17:08Z
    date available2017-05-08T21:17:08Z
    date copyrightAugust 1999
    date issued1999
    identifier other%28asce%290899-1561%281999%2911%3A3%28236%29.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/45595
    description abstractThe distresses of asphalt pavement, which include fatigue, rutting, and low temperature cracking, are related to the elastic modulus of asphalt concrete (AC). In addition, the elastic modulus of AC is a design variable for asphalt pavement structural design when elastic-layer system theory is employed. However, in the most commonly used AC design methods (the Marshall, Hveem, and Superpave methods), the elastic modulus is not used as a control variable. Therefore, these design methods do not ensure that the desired elastic modulus of AC will be obtained. In this paper, AC is treated as a two-phase composite with aggregates dispersed in the asphalt matrix. Based on this treatment, a two-layer built-in micromechanical model of AC is developed by embedding an asphalt-coated circular aggregate into an equivalent AC medium. Using this model, an equation predicting the elastic modulus of AC is derived. The elastic modulus of AC predicted by the present model is compared with the Hashin and Shtrikman theoretical bounds and the Heukelom and Klomp equation. Using these comparisons, the proposed model is shown to be reasonable and applicable for predicting the elastic modulus of AC. Thus, the existing mix design approaches can be improved by using the modulus prediction model presented in this paper.
    publisherAmerican Society of Civil Engineers
    titleElastic Modulus Prediction of Asphalt Concrete
    typeJournal Paper
    journal volume11
    journal issue3
    journal titleJournal of Materials in Civil Engineering
    identifier doi10.1061/(ASCE)0899-1561(1999)11:3(236)
    treeJournal of Materials in Civil Engineering:;1999:;Volume ( 011 ):;issue: 003
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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