Volume 139, Issue 30 e52690
RESEARCH ARTICLE

Reutilization of crystalline waste plastics for modified asphalt using twin-screw extrusion: Polyethylene and polypropylene as typical subjects

Junwei Li

Junwei Li

School of Materials Science and Engineering, Tianjin Chengjian University, Tianjin, P. R. China

Research Center, Tianjin Key Laboratory of Building Green Functional Materials, Tianjin, P. R. China

Contribution: Funding acquisition (lead)

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Shoubo Jia

Shoubo Jia

School of Materials Science and Engineering, Tianjin Chengjian University, Tianjin, P. R. China

Contribution: Writing - original draft (lead)

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Dan Yang

Dan Yang

School of Materials Science and Engineering, Tianjin Chengjian University, Tianjin, P. R. China

Contribution: Writing - review & editing (equal)

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Xin Li

Xin Li

Comprehensive Traffic Research Center, Tianjin Institute of Transportation Science, Tianjin, P. R. China

Contribution: Project administration (lead)

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Dongdong Li

Dongdong Li

Transportation Division, Tianjin Transportation Infrastructure Maintenance Group Co. Ltd, Tianjin, P. R. China

Contribution: Resources (equal)

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Xia Ye

Xia Ye

School of Materials Science and Engineering, Tianjin Chengjian University, Tianjin, P. R. China

Contribution: Data curation (equal)

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Pengbing Guan

Pengbing Guan

School of Materials Science and Engineering, Tianjin Chengjian University, Tianjin, P. R. China

Contribution: Data curation (equal)

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Yongke Zhao

Corresponding Author

Yongke Zhao

School of Materials Science and Engineering, Tianjin Chengjian University, Tianjin, P. R. China

Correspondence

Yongke Zhao, School of Materials Science and Engineering, Tianjin Chengjian University, Tianjin 300384, P. R. China.

Email: [email protected]

Contribution: Validation (lead)

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First published: 03 June 2022

Funding information: Transportation Science and Technology Development Plan of Tianjin, Grant/Award Numbers: 2022-12, 2019-14

Abstract

The key technologies for waste plastic modified asphalt were storage stability and low temperature performance. In order to reutilize waste plastics for modified asphalt, a simple strategy, which based on recrystallization of the waste plastics, was proposed in this article. It was found that the pretreated waste plastics had higher crystallinity and smaller crystal size. Moreover, the deformation resistance and stability of the modified asphalt were improved. In addition, a rational mechanism called “polymer crystals confinement effect” was proposed to reveal the intrinsic correlation between the properties of crystalline waste plastics and modified asphalt.

DATA AVAILABILITY STATEMENT

The data that support the findings of this study are available on request from the corresponding author. The data are not publicly available due to privacy or ethical restrictions.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.