Predicting the low-temperature performance of asphalt binder based on rheological model. (4th October 2021)

• Record Type: Journal Article
• Authors: Xu, Jiaqiu; Fan, Zepeng; Lin, Jiao; Yang, Xuan; Wang, Dawei; Oeser, Markus
• Is Part Of: Construction & building materials. Volume 302(2021)
• Publication Date: 2021-10-04
• Subjects: Asphalt binder -- Low-temperature performance -- Glass transition temperature -- Torsion cylinder test -- Differential scanning calorimeter -- Critical cracking temperature; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2021.124401
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: An approach for estimating Tg to predict low-temperature performance was presented. TC test was proposed to measure Tg directly. TC test and DSC were conducted to demonstrate the RTE method. Relationship between RTE method and low-temperature performance was established. Abstract: At present, the test methods to evaluate the low-temperature performance of asphalt binder focus on bending beam rheometer (BBR), and dynamic shear rheometer (DSR) is mainly used for high-temperature and medium-temperature tests. The reason is that when the test is in the low-temperature range, the instrument compliance errors are an unavoidable problem in DSR test. To solve this, based on the frequency sweep test of DSR, the modified Havriliak-Negami (MHN) model was employed to deduce the temperature at which asphalt binder undergoing the glass transition, and the torsion cylinder (TC) test and differential scanning calorimeter (DSC) were conducted to verify its correctness. Furthermore, the relationship between this approach and the low-temperature performance of asphalt binder is established by nonlinear fitting and linear regression analysis. This study presented an approach to predict the low-temperature performance of asphalt binder based on rheological model, which provides a solution to the difficulty of evaluating the low-temperature performance of asphalt binder using DSR.