Applying solution of spray polyurea elastomer in asphalt binder: Feasibility analysis and DSR study based on the MSCR and LAS tests

The polyurea elastomer (PUA) powder modifier was prepared by the method of spraying–initial crushing–fine grinding, and then, the PUA-modified asphalt was produced. The typical functional structure of PUA was identified and characterized. The apparent viscosity of PUA-modified asphalt was tested at...

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Bibliographic Details
Published inNanotechnology reviews (Berlin) Vol. 12; no. 1; pp. 438 - 49
Main Authors Sun, Xiaolong, Yuan, Zhengbing, Huang, Zhenying, Xu, Qin, Zhu, Yongqiang, Xu, Xinquan, Yuan, Junshen, Liu, Zhisheng, Zhang, Yikang, Chen, Qian, Ng, Alex Hay-Man
Format Journal Article
LanguageEnglish
Published Berlin De Gruyter 25.02.2023
Walter de Gruyter GmbH
Subjects
Asphalt
asphalt binder
Creep recovery
Elastic properties
Elastomers
Fatigue cracks
Fatigue tests
Feasibility studies
Fine grinding
Heat resistance
High temperature
Materials fatigue
microstructure
Particle size
Polyureas
PUA
rheological properties
Spraying
Temperature
Viscosity
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Summary:The polyurea elastomer (PUA) powder modifier was prepared by the method of spraying–initial crushing–fine grinding, and then, the PUA-modified asphalt was produced. The typical functional structure of PUA was identified and characterized. The apparent viscosity of PUA-modified asphalt was tested at different temperatures. The impact of particle size and content of PUA on creep and recovery properties of asphalt at high temperature was investigated through the multiple stress creep recovery test. The mesothermal fatigue behavior of PUA-modified asphalt was evaluated by means of time sweep and linear amplitude sweep. Results indicated that the high elastic properties of PUA materials might depend on the spherical structure inside PUA material. The diameter of functional structure was around 20 µm and presented as 3D ball structure. The increase in PUA particle size would lead to the increase in cracks and folds in the bonding surface PUA modifier could improve by about 50% of the apparent viscosity significantly. Furthermore, PUA modifier could promote the high-temperature rutting resistance and middle-temperature fatigue property of asphalt. The improving effect on R could reach almost 28% and the 0.075 mm could be the best application size of PUA.
ISSN:2191-9097
2191-9089
2191-9097
DOI:10.1515/ntrev-2022-0508