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- Title
Investigation of Viscoelastic Properties of Polymer-Modified Asphalt at Low Temperature Based on Gray Relational Analysis.
- Authors
Huang, Zhongcai; Lu, Rong; Fu, Zhiyu; Li, Jingxiao; Li, Pengfei; Wang, Di; Wei, Ben; Zhu, Weining; Wang, Zujian; Wang, Xinyu
- Abstract
As the investigation indexes of low-temperature viscoelastic properties of polymer-modified asphalt (PMA) are unclear at present, in this paper, the creep stiffness (S), creep rate (m), low-temperature continuous classification temperature (TC), ΔTC, m/S, relaxation time ( λ ), and dissipation energy ratio ( W d t / W s t ) were taken as a comparison sequence. The maximum flexural tensile strain (εB) of porous asphalt mixture (PAM) in a low-temperature bending test was selected as a reference sequence. Gray relational analysis was used to investigate the PMA's low-temperature viscoelastic properties based on a bending beam rheometer (BBR). The results show certain contradictions in investigating the low-temperature properties of PMA when only considering the low-temperature deformation capacity or the stress relaxation capacity. The modulus and relaxation capacity should be considered when selecting the investigation indexes of the low-temperature viscoelastic properties of PMA. When rheological method is used to evaluate the low-temperature of polymer modified asphalt, TC and m/S are preferred. When only S or m is contradictory, m should be preferred. ΔTC can determine whether the low-temperature performance of PMA is dominated by S or m. The result can better guide the construction of asphalt pavement in areas with low temperatures. Asphalt can be selected quickly and accurately to avoid the waste of resources.
- Subjects
LOW temperatures; ASPHALT; STRAINS &; stresses (Mechanics); ENERGY dissipation; BEND testing; ASPHALT pavements; CREEP (Materials)
- Publication
Sustainability (2071-1050), 2023, Vol 15, Issue 8, p6858
- ISSN
2071-1050
- Publication type
Article
- DOI
10.3390/su15086858