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    Effect of Photocatalysts Modification on Asphalt: Investigations by Experiments and Theoretical Calculation

    Source: Journal of Materials in Civil Engineering:;2021:;Volume ( 033 ):;issue: 005::page 04021083-1
    Author:
    Xuejuan Cao
    ,
    Mei Deng
    ,
    Yongjie Ding
    ,
    Boming Tang
    ,
    Xiaoyu Yang
    ,
    Bolin Shan
    ,
    Yue Su
    DOI: 10.1061/(ASCE)MT.1943-5533.0003708
    Publisher: ASCE
    Abstract: The application of photocatalysts on pavement engineering to degrade automobile exhaust has become a hot topic for researchers. However, the effect of photocatalysts on pavement materials has not been fully investigated. The primary purpose of this study is to explore the effect of a typical photocatalyst titanium dioxide (TiO2) on the chemical structure and properties of asphalt through laboratory experiments and molecular dynamics (MD) simulation. Performance tests indicated that the physical properties of asphalt modified by TiO2 changed more significantly compared with that of calcium carbonate (CaCO3) and silica (SiO2), which might be due to the smaller particle size of TiO2. Atomic force microscopy (AFM) and Fourier infrared spectrum (FI-IR) analyses demonstrated that the addition of TiO2 resulted in a smoother asphalt surface and a disappearance of the bee structure. Using TiO2 would not accelerate the aging process of asphalt. Moreover, the MD simulation results indicated that a more significant interaction existed between TiO2 and asphalt than that of CaCO3 and SiO2, which resulted in a tighter asphalt molecule and smaller free volume distribution in the TiO2-asphalt system.
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      Effect of Photocatalysts Modification on Asphalt: Investigations by Experiments and Theoretical Calculation

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4270015
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    contributor authorXuejuan Cao
    contributor authorMei Deng
    contributor authorYongjie Ding
    contributor authorBoming Tang
    contributor authorXiaoyu Yang
    contributor authorBolin Shan
    contributor authorYue Su
    date accessioned2022-01-31T23:35:53Z
    date available2022-01-31T23:35:53Z
    date issued5/1/2021
    identifier other%28ASCE%29MT.1943-5533.0003708.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4270015
    description abstractThe application of photocatalysts on pavement engineering to degrade automobile exhaust has become a hot topic for researchers. However, the effect of photocatalysts on pavement materials has not been fully investigated. The primary purpose of this study is to explore the effect of a typical photocatalyst titanium dioxide (TiO2) on the chemical structure and properties of asphalt through laboratory experiments and molecular dynamics (MD) simulation. Performance tests indicated that the physical properties of asphalt modified by TiO2 changed more significantly compared with that of calcium carbonate (CaCO3) and silica (SiO2), which might be due to the smaller particle size of TiO2. Atomic force microscopy (AFM) and Fourier infrared spectrum (FI-IR) analyses demonstrated that the addition of TiO2 resulted in a smoother asphalt surface and a disappearance of the bee structure. Using TiO2 would not accelerate the aging process of asphalt. Moreover, the MD simulation results indicated that a more significant interaction existed between TiO2 and asphalt than that of CaCO3 and SiO2, which resulted in a tighter asphalt molecule and smaller free volume distribution in the TiO2-asphalt system.
    publisherASCE
    titleEffect of Photocatalysts Modification on Asphalt: Investigations by Experiments and Theoretical Calculation
    typeJournal Paper
    journal volume33
    journal issue5
    journal titleJournal of Materials in Civil Engineering
    identifier doi10.1061/(ASCE)MT.1943-5533.0003708
    journal fristpage04021083-1
    journal lastpage04021083-9
    page9
    treeJournal of Materials in Civil Engineering:;2021:;Volume ( 033 ):;issue: 005
    contenttypeFulltext
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