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    Nonlinear Rheological Characterizations of Reactive Elastomeric Terpolymer-Modified Asphalt Binder Based on Large-Amplitude Oscillatory Shear Test

    Source: Journal of Materials in Civil Engineering:;2023:;Volume ( 035 ):;issue: 012::page 04023482-1
    Author:
    Enhui Yang
    ,
    Yunchuan Du
    ,
    Yingxiang Wang
    ,
    Hai Yuan
    ,
    Jiale Chen
    ,
    Haibo Di
    ,
    Feiyun Yuan
    ,
    Yanjun Qiu
    DOI: 10.1061/JMCEE7.MTENG-16597
    Publisher: ASCE
    Abstract: In this paper, we investigated the nonlinear rheological behavior of two types of modified asphalt binders, namely reactive elastomeric terpolymer-modified asphalt binder (REA) and styrene-butadiene-styrene–modified asphalt binder (SBA), under large strains using large-amplitude oscillatory shear (LAOS) testing. To determine the test strain levels, we conducted strain sweeps at different temperatures and shear frequencies before subjecting the asphalt binders to the LAOS test. Our findings show that the nonlinear critical strain of asphalt binders has a temperature and frequency dependence, with smaller values at lower temperatures and higher frequencies, indicating stronger nonlinear rheological properties. We used Fourier-transform rheology to analyze the relative intensity of higher harmonics of asphalt binders (In/I1, 3≤n≤9) and found that the nonlinear parameter I3/I1 increased with shear frequency and strain amplitude, and that the In/I1 of REA was much larger than that of SBA. To evaluate the performance of the modified asphalt binders, we used the zero-strain nonlinear parameter Q0 and found that REA had a higher Q0 value than SBA at the same frequency. Furthermore, based on the Lissajous curves at 25°C and 10  rad/s, we observed that the aberration degree of the curves increased with increasing strain amplitude. The Lissajous curves of both base asphalt binder (BA) and SBA failed to form a closed ellipse due to sample damage at larger strain levels, which means that BA and SBA are less resistant to large deformations, whereas REA maintained a higher load-bearing capacity. We also observed that both modified asphalt binders exhibited continuous shear-thinning properties. At higher strains, the intermolecular forces in SBA were overcome by shear deformation, whereas the chemical bonds formed between oxygen-containing functional groups and carboxylic acid groups in REA were gradually broken by stretching. LAOS test results demonstrated that REA exhibited higher deformation resistance potential at large strain levels compared with SBA.
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      Nonlinear Rheological Characterizations of Reactive Elastomeric Terpolymer-Modified Asphalt Binder Based on Large-Amplitude Oscillatory Shear Test

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4296168
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    contributor authorEnhui Yang
    contributor authorYunchuan Du
    contributor authorYingxiang Wang
    contributor authorHai Yuan
    contributor authorJiale Chen
    contributor authorHaibo Di
    contributor authorFeiyun Yuan
    contributor authorYanjun Qiu
    date accessioned2024-04-27T20:53:03Z
    date available2024-04-27T20:53:03Z
    date issued2023/12/01
    identifier other10.1061-JMCEE7.MTENG-16597.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4296168
    description abstractIn this paper, we investigated the nonlinear rheological behavior of two types of modified asphalt binders, namely reactive elastomeric terpolymer-modified asphalt binder (REA) and styrene-butadiene-styrene–modified asphalt binder (SBA), under large strains using large-amplitude oscillatory shear (LAOS) testing. To determine the test strain levels, we conducted strain sweeps at different temperatures and shear frequencies before subjecting the asphalt binders to the LAOS test. Our findings show that the nonlinear critical strain of asphalt binders has a temperature and frequency dependence, with smaller values at lower temperatures and higher frequencies, indicating stronger nonlinear rheological properties. We used Fourier-transform rheology to analyze the relative intensity of higher harmonics of asphalt binders (In/I1, 3≤n≤9) and found that the nonlinear parameter I3/I1 increased with shear frequency and strain amplitude, and that the In/I1 of REA was much larger than that of SBA. To evaluate the performance of the modified asphalt binders, we used the zero-strain nonlinear parameter Q0 and found that REA had a higher Q0 value than SBA at the same frequency. Furthermore, based on the Lissajous curves at 25°C and 10  rad/s, we observed that the aberration degree of the curves increased with increasing strain amplitude. The Lissajous curves of both base asphalt binder (BA) and SBA failed to form a closed ellipse due to sample damage at larger strain levels, which means that BA and SBA are less resistant to large deformations, whereas REA maintained a higher load-bearing capacity. We also observed that both modified asphalt binders exhibited continuous shear-thinning properties. At higher strains, the intermolecular forces in SBA were overcome by shear deformation, whereas the chemical bonds formed between oxygen-containing functional groups and carboxylic acid groups in REA were gradually broken by stretching. LAOS test results demonstrated that REA exhibited higher deformation resistance potential at large strain levels compared with SBA.
    publisherASCE
    titleNonlinear Rheological Characterizations of Reactive Elastomeric Terpolymer-Modified Asphalt Binder Based on Large-Amplitude Oscillatory Shear Test
    typeJournal Article
    journal volume35
    journal issue12
    journal titleJournal of Materials in Civil Engineering
    identifier doi10.1061/JMCEE7.MTENG-16597
    journal fristpage04023482-1
    journal lastpage04023482-14
    page14
    treeJournal of Materials in Civil Engineering:;2023:;Volume ( 035 ):;issue: 012
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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