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    Torsional Shear Resistance of Pavement Structure with Rubber Powder–Modified Asphalt Gravel Bonding Layer

    Source: Journal of Materials in Civil Engineering:;2025:;Volume ( 037 ):;issue: 004::page 04025032-1
    Author:
    Dandan Yin
    ,
    Lan Wang
    ,
    Liqiang Yin
    ,
    Zhiyu Wang
    ,
    Shihui Liu
    ,
    Lin Li
    DOI: 10.1061/JMCEE7.MTENG-18946
    Publisher: American Society of Civil Engineers
    Abstract: Previous research has illustrated the exceptional shear resistance afforded by the rubber powder–modified asphalt gravel bonding layer. This study introduces an innovative interlayer torsional shear testing apparatus to evaluate shear performance between the base and surface layers of semirigid asphalt pavements under torsional shear, further proposing a methodology for calculating maximal torsional shear stress in a square section. The investigation assessed shear strength at the interface under various ambient temperatures (−10°C, 25°C, and 45°C) and normal stresses (0.35 MPa, 0.525 MPa, 0.7 MPa). Moreover, a finite-element model, integrating the rubber powder–modified asphalt macadam bonding layer through cohesive contact, was developed to explore alterations in interlayer shear stress under diverse conditions. Findings reveal a pronounced temperature-dependent effect on interlayer shear strength, with a notable decrease in strength as temperature increases. Torsional shear strength consistently falls below obliqued shear strength, particularly under colder conditions, showing a 48% reduction. Conversely, torsional shear strength significantly improves with increasing normal stress. Mechanical response analysis demonstrated a direct link between interlaminar shear stress and vehicular load, indicating that interlayer shear stress exceeds those levels observed during linear travel upon vehicular turning. Nevertheless, the interfacial shear stress between the base and surface layers reliably satisfies the requisite shear strength criteria, irrespective of vehicular movement. Indoor torsional shear testing has proven to be an indispensable technique for assessing bonding efficacy between semirigid bases and asphalt pavement surfaces, given the dynamic nature of vehicular motion.
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      Torsional Shear Resistance of Pavement Structure with Rubber Powder–Modified Asphalt Gravel Bonding Layer

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    contributor authorDandan Yin
    contributor authorLan Wang
    contributor authorLiqiang Yin
    contributor authorZhiyu Wang
    contributor authorShihui Liu
    contributor authorLin Li
    date accessioned2025-04-20T10:08:17Z
    date available2025-04-20T10:08:17Z
    date copyright1/23/2025 12:00:00 AM
    date issued2025
    identifier otherJMCEE7.MTENG-18946.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4304066
    description abstractPrevious research has illustrated the exceptional shear resistance afforded by the rubber powder–modified asphalt gravel bonding layer. This study introduces an innovative interlayer torsional shear testing apparatus to evaluate shear performance between the base and surface layers of semirigid asphalt pavements under torsional shear, further proposing a methodology for calculating maximal torsional shear stress in a square section. The investigation assessed shear strength at the interface under various ambient temperatures (−10°C, 25°C, and 45°C) and normal stresses (0.35 MPa, 0.525 MPa, 0.7 MPa). Moreover, a finite-element model, integrating the rubber powder–modified asphalt macadam bonding layer through cohesive contact, was developed to explore alterations in interlayer shear stress under diverse conditions. Findings reveal a pronounced temperature-dependent effect on interlayer shear strength, with a notable decrease in strength as temperature increases. Torsional shear strength consistently falls below obliqued shear strength, particularly under colder conditions, showing a 48% reduction. Conversely, torsional shear strength significantly improves with increasing normal stress. Mechanical response analysis demonstrated a direct link between interlaminar shear stress and vehicular load, indicating that interlayer shear stress exceeds those levels observed during linear travel upon vehicular turning. Nevertheless, the interfacial shear stress between the base and surface layers reliably satisfies the requisite shear strength criteria, irrespective of vehicular movement. Indoor torsional shear testing has proven to be an indispensable technique for assessing bonding efficacy between semirigid bases and asphalt pavement surfaces, given the dynamic nature of vehicular motion.
    publisherAmerican Society of Civil Engineers
    titleTorsional Shear Resistance of Pavement Structure with Rubber Powder–Modified Asphalt Gravel Bonding Layer
    typeJournal Article
    journal volume37
    journal issue4
    journal titleJournal of Materials in Civil Engineering
    identifier doi10.1061/JMCEE7.MTENG-18946
    journal fristpage04025032-1
    journal lastpage04025032-12
    page12
    treeJournal of Materials in Civil Engineering:;2025:;Volume ( 037 ):;issue: 004
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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