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    Effect of Oxidative Aging on Dynamic Modulus of Hot-Mix Asphalt Mixtures

    Source: Journal of Materials in Civil Engineering:;2019:;Volume ( 031 ):;issue: 001
    Author:
    Yong Wen; Yuhong Wang
    DOI: 10.1061/(ASCE)MT.1943-5533.0002547
    Publisher: American Society of Civil Engineers
    Abstract: The dynamic modulus (|E*|) of asphalt mixtures is an important parameter in pavement design and analysis. Although the |E*| values of freshly prepared hot-mix asphalt (HMA) mixtures can be conveniently determined through laboratory tests, the |E*| values of field pavements continuously evolve as asphalt binder ages, and hence are difficult to determine. To examine the effects of asphalt binder aging on the |E*| of asphalt mixtures, a new piece of equipment is developed for the accelerated aging treatment of compacted asphalt mixture specimens. A set of small-size sampling, binder extraction, and recovery methods are used to determine the aging state of asphalt binder in asphalt mixtures. Three types of asphalt mixtures with different aging states are used to study the effects of aging on the |E*| changes. In addition, based on the |E*| test results, mixtures’ volumetric properties, and binders’ rheological properties at different aging states, the accuracy and robustness of six commonly used |E*| prediction models are compared. The developed equipment and method are anticipated to assist with the characterization of aged asphalt mixtures and the further improvement of |E*| prediction models.
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      Effect of Oxidative Aging on Dynamic Modulus of Hot-Mix Asphalt Mixtures

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    contributor authorYong Wen; Yuhong Wang
    date accessioned2019-03-10T12:17:43Z
    date available2019-03-10T12:17:43Z
    date issued2019
    identifier other%28ASCE%29MT.1943-5533.0002547.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4255276
    description abstractThe dynamic modulus (|E*|) of asphalt mixtures is an important parameter in pavement design and analysis. Although the |E*| values of freshly prepared hot-mix asphalt (HMA) mixtures can be conveniently determined through laboratory tests, the |E*| values of field pavements continuously evolve as asphalt binder ages, and hence are difficult to determine. To examine the effects of asphalt binder aging on the |E*| of asphalt mixtures, a new piece of equipment is developed for the accelerated aging treatment of compacted asphalt mixture specimens. A set of small-size sampling, binder extraction, and recovery methods are used to determine the aging state of asphalt binder in asphalt mixtures. Three types of asphalt mixtures with different aging states are used to study the effects of aging on the |E*| changes. In addition, based on the |E*| test results, mixtures’ volumetric properties, and binders’ rheological properties at different aging states, the accuracy and robustness of six commonly used |E*| prediction models are compared. The developed equipment and method are anticipated to assist with the characterization of aged asphalt mixtures and the further improvement of |E*| prediction models.
    publisherAmerican Society of Civil Engineers
    titleEffect of Oxidative Aging on Dynamic Modulus of Hot-Mix Asphalt Mixtures
    typeJournal Paper
    journal volume31
    journal issue1
    journal titleJournal of Materials in Civil Engineering
    identifier doi10.1061/(ASCE)MT.1943-5533.0002547
    page04018348
    treeJournal of Materials in Civil Engineering:;2019:;Volume ( 031 ):;issue: 001
    contenttypeFulltext
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