Comparison and evaluation of different test methods and models for determining zero shear viscosity of asphalt binder
Zero shear viscosity (ZSV) has been proven to be a reasonable indicator for characterizing the high-temperature performance of asphalt binders. Various test methods and models have been used in the literature to determine the ZSV, while no consistent result can be obtained. In addition, the differences and similarities among these methods are not yet clear, which can often bring difficulties and confusion to researchers when trying to implement the ZSV methods. This paper aims to evaluate the applicability of different test methods and rheological models in determining the ZSVs of asphalts. The shear rate sweep test, frequency sweep test, and creep test were performed on 60/80 and 80/100 pen grade base asphalts and styrenebutadiene-styrene (SBS) modified asphalt, and ZSVs were determined using Carreau’s model, Carreau-Yasuda model, Cross/Sybilski’s model, Cross/Williamson’s model, Burger’s model, the threshold method, and the ratio method. The test results showed that the shear rate sweep test and the creep test have lower variability and better applicability than the frequency sweep test, and the four rheological models and the threshold method used in the shear rate sweep test could determine the ZSV well. In the frequency sweep test, the Cross/Sybilski’s model failed to determine the ZSVs of all asphalts, and the ZSV of SBS asphalt could only be calculated by the ratio method. Under different test methods and models, the ZSVs of each base asphalt were similar, while that of SBS asphalt were significantly different. Considering the time consumption and applicability of the test, the shear rate sweep test seems to be the most promising test method for determining ZSVs.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/00903973
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Supplemental Notes:
- © 2021 by ASTM International. Abstract used with permission of ASTM International.
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Authors:
- Wang, Honglei
- Liu, Jianfeng
- Qin, Hua
- Wang, Xue
- Tao, Zhuohui
- Shen, Shihui
- Publication Date: 2022-3
Language
- English
Media Info
- Media Type: Web
- Features: References;
- Pagination: 15p
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Serial:
- Journal of Testing and Evaluation
- Volume: 50
- Issue Number: 2
- Publisher: American Society for Testing and Materials (ASTM)
- ISSN: 0090-3973
- EISSN: 1945-7553
- Serial URL: https://www.astm.org/DIGITAL_LIBRARY/JOURNALS/TESTEVAL/index.html
Subject/Index Terms
- TRT Terms: Alternatives analysis; Asphalt tests; Bituminous binders; Mathematical models; Test procedures; Viscosity
- Subject Areas: Highways; Materials;
Filing Info
- Accession Number: 01788121
- Record Type: Publication
- Files: TRIS
- Created Date: Nov 16 2021 3:19PM