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    Improving the Electromagnetic Properties of Bitumen Using SiC-Fe3O4 Composites

    Source: Journal of Materials in Civil Engineering:;2021:;Volume ( 033 ):;issue: 011::page 04021326-1
    Author:
    Xiaoming Liu
    ,
    Ziqi Wei
    ,
    Yu Zhao
    ,
    Daxiong Yan
    DOI: 10.1061/(ASCE)MT.1943-5533.0003953
    Publisher: ASCE
    Abstract: It is important to further improve the microwave absorption capacity of bitumen to promote the application of microwave heating in pavement maintenance. SiC-Fe3O4 composites were prepared as microwave-enhanced materials based on the impedance matching theory and the limitation of traditional single-phase microwave absorber. A network analyzer was used to measure the electromagnetic parameters. The rheological properties were evaluated and the morphological characteristics of SiC-Fe3O4 composites were studied. The process of microwave-heating of bituminous concrete was simulated and the heating rate and heat distribution were analyzed intensively. The results showed that the reflection loss of bitumen containing SiC-Fe3O4 composites reached −21.82  dB (the microwave reflectivity was only 1%), which is 13.4 dB lower than that of the bitumen containing SiC. The average heating rate of the bituminous concrete containing optimum SiC-Fe3O4 composites was 0.322°C/s, which is 1.88 times of that of pure bituminous concrete, and higher than that of bituminous concrete containing either SiC or Fe3O4. SiC-Fe3O4 composites improved the thermal conductivity of bituminous concrete, as well. The rheological properties of bitumen did not decline. The microstructure of SiC-Fe3O4 composites contributed to microwave absorption. It can be concluded that the bitumen containing SiC-Fe3O4 composites has stronger microwave-absorption ability compared with the bitumen containing a single-phase absorber. The bituminous concrete with composites had a greater microwave heating effect, and the optimum mass ratio of SiC to Fe3O4 was 1∶2.
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      Improving the Electromagnetic Properties of Bitumen Using SiC-Fe3O4 Composites

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4272614
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    contributor authorXiaoming Liu
    contributor authorZiqi Wei
    contributor authorYu Zhao
    contributor authorDaxiong Yan
    date accessioned2022-02-01T22:06:02Z
    date available2022-02-01T22:06:02Z
    date issued11/1/2021
    identifier other%28ASCE%29MT.1943-5533.0003953.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4272614
    description abstractIt is important to further improve the microwave absorption capacity of bitumen to promote the application of microwave heating in pavement maintenance. SiC-Fe3O4 composites were prepared as microwave-enhanced materials based on the impedance matching theory and the limitation of traditional single-phase microwave absorber. A network analyzer was used to measure the electromagnetic parameters. The rheological properties were evaluated and the morphological characteristics of SiC-Fe3O4 composites were studied. The process of microwave-heating of bituminous concrete was simulated and the heating rate and heat distribution were analyzed intensively. The results showed that the reflection loss of bitumen containing SiC-Fe3O4 composites reached −21.82  dB (the microwave reflectivity was only 1%), which is 13.4 dB lower than that of the bitumen containing SiC. The average heating rate of the bituminous concrete containing optimum SiC-Fe3O4 composites was 0.322°C/s, which is 1.88 times of that of pure bituminous concrete, and higher than that of bituminous concrete containing either SiC or Fe3O4. SiC-Fe3O4 composites improved the thermal conductivity of bituminous concrete, as well. The rheological properties of bitumen did not decline. The microstructure of SiC-Fe3O4 composites contributed to microwave absorption. It can be concluded that the bitumen containing SiC-Fe3O4 composites has stronger microwave-absorption ability compared with the bitumen containing a single-phase absorber. The bituminous concrete with composites had a greater microwave heating effect, and the optimum mass ratio of SiC to Fe3O4 was 1∶2.
    publisherASCE
    titleImproving the Electromagnetic Properties of Bitumen Using SiC-Fe3O4 Composites
    typeJournal Paper
    journal volume33
    journal issue11
    journal titleJournal of Materials in Civil Engineering
    identifier doi10.1061/(ASCE)MT.1943-5533.0003953
    journal fristpage04021326-1
    journal lastpage04021326-10
    page10
    treeJournal of Materials in Civil Engineering:;2021:;Volume ( 033 ):;issue: 011
    contenttypeFulltext
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