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    Determination of Minimum Dynamic Modulus (E*) of High Modulus Asphalt Concrete Applied to Semirigid Base Asphalt Pavement

    Source: Journal of Materials in Civil Engineering:;2021:;Volume ( 034 ):;issue: 001::page 04021378
    Author:
    Ying Fang
    ,
    Zhengqi Zhang
    ,
    Suqing Wang
    ,
    Jianhua Yang
    ,
    Xinjun Li
    DOI: 10.1061/(ASCE)MT.1943-5533.0004013
    Publisher: ASCE
    Abstract: In order to mitigate the serious rutting disease of the semirigid base asphalt pavement (SBAP), measuring the settings of a high modulus asphalt concrete (HMAC) layer in the SBAP structure was proposed in this study. In this paper, the mechanical structure model was established according to the typical structure in the perpetual pavement (PP) design, and the mechanical response of pavement structure was analyzed, and then, the reasonable calculation points, critical failure axle load, and minimum E* value of HMAC applicable to the PP structure were demonstrated. On this basis, referring to the design concept and analysis process of the PP structure, the reasonable calculation points, critical failure axle load, and minimum E* value of HMAC applicable to the SBAP structure were determined, and then, the antirutting behavior of HMAC was analyzed and discussed. The results show that under the vehicle load, the SBAP structure shows different mechanical responses with the PP structure. For the PP structure, the center of wheel gap should be used as the calculation control point; differently for the SBAP structure, the center of wheel gap, the center of the load action and the edge of the load action should be respectively taken as the analysis points of antifatigue, vertical compressive stress, and shear strain. Also, the critical failure axle load of the two pavement structures was both determined as 130 kN. In order to achieve the design goal of pavement durability, the minimum E* value of HMAC applicable to the PP structure should not be less than 14,000  MPa (20°C, 10 Hz); while for the SBAP structure, the minimum E* value of HMAC should not be less than 13,000  MPa (20°C, 10 Hz). In addition, setting the high modulus layer (HMAC) in the middle and lower surface layer of SBAP structure can effectively reduce the shear deformation and the vertical deformation of the structure layer, thus improving the rutting resistance of pavement structure.
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      Determination of Minimum Dynamic Modulus (E*) of High Modulus Asphalt Concrete Applied to Semirigid Base Asphalt Pavement

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4281879
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    contributor authorYing Fang
    contributor authorZhengqi Zhang
    contributor authorSuqing Wang
    contributor authorJianhua Yang
    contributor authorXinjun Li
    date accessioned2022-05-07T19:59:40Z
    date available2022-05-07T19:59:40Z
    date issued2021-10-18
    identifier other(ASCE)MT.1943-5533.0004013.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4281879
    description abstractIn order to mitigate the serious rutting disease of the semirigid base asphalt pavement (SBAP), measuring the settings of a high modulus asphalt concrete (HMAC) layer in the SBAP structure was proposed in this study. In this paper, the mechanical structure model was established according to the typical structure in the perpetual pavement (PP) design, and the mechanical response of pavement structure was analyzed, and then, the reasonable calculation points, critical failure axle load, and minimum E* value of HMAC applicable to the PP structure were demonstrated. On this basis, referring to the design concept and analysis process of the PP structure, the reasonable calculation points, critical failure axle load, and minimum E* value of HMAC applicable to the SBAP structure were determined, and then, the antirutting behavior of HMAC was analyzed and discussed. The results show that under the vehicle load, the SBAP structure shows different mechanical responses with the PP structure. For the PP structure, the center of wheel gap should be used as the calculation control point; differently for the SBAP structure, the center of wheel gap, the center of the load action and the edge of the load action should be respectively taken as the analysis points of antifatigue, vertical compressive stress, and shear strain. Also, the critical failure axle load of the two pavement structures was both determined as 130 kN. In order to achieve the design goal of pavement durability, the minimum E* value of HMAC applicable to the PP structure should not be less than 14,000  MPa (20°C, 10 Hz); while for the SBAP structure, the minimum E* value of HMAC should not be less than 13,000  MPa (20°C, 10 Hz). In addition, setting the high modulus layer (HMAC) in the middle and lower surface layer of SBAP structure can effectively reduce the shear deformation and the vertical deformation of the structure layer, thus improving the rutting resistance of pavement structure.
    publisherASCE
    titleDetermination of Minimum Dynamic Modulus (E*) of High Modulus Asphalt Concrete Applied to Semirigid Base Asphalt Pavement
    typeJournal Paper
    journal volume34
    journal issue1
    journal titleJournal of Materials in Civil Engineering
    identifier doi10.1061/(ASCE)MT.1943-5533.0004013
    journal fristpage04021378
    journal lastpage04021378-12
    page12
    treeJournal of Materials in Civil Engineering:;2021:;Volume ( 034 ):;issue: 001
    contenttypeFulltext
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