Rheological properties of composite DTDM/DOP/SBS modified asphalt and its effect on high and low temperature performance

Ma, Shengkang; Gu, Yongcai; Gao, Meiyi; Shan, Zhaohui

doi:10.1016/j.cscm.2023.e02031

Cited by 7 publications

(1 citation statement)

References 18 publications

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“…By analyzing the complex shear modulus, phase angle, rutting factor and alternative indexes, the high-temperature elastic properties of the high-viscosity modified asphalt were comprehensively analyzed. Ma (2018) took different matrix asphalt, different kinds of SBS modifier and different modifier dosage as research objects, designed orthogonal tests, analyzed creep stiffness and creep velocity rate through the rheological test of bending beam and conducted gray correlation analysis on the indexes to explore the low temperature rheological properties of different kinds of modified asphalt with different dosage. Tang (2016) and Guo (2018) used multi-stress creep recovery check to investigate the irrecoverable creep compliance and stress sensitivity of various modified asphalt and applied traffic classification of modified asphalt according to AASHTO standard.…”

Section: Introductionmentioning

confidence: 99%

Comparative analysis on rheological characteristics of different modified asphalt based on DSR and BBR evaluation

Sun

2021

JEDT

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Purpose In order to evaluate the rheological properties of asphalt more comprehensively and effectively, and to explore and discuss the practicability of relevant models in the evaluation of the rheological properties of asphalt. Design/methodology/approach Based on the rheological and viscoelastic theories, temperature scanning, frequency scanning and multiple stress creep recovery (MSCR) tests of different modified asphalt were carried out by dynamic shear rheometer (DSR) to obtain relevant viscoelastic parameters and evaluate the high temperature properties of different modified asphalt. Based on the time-temperature equivalence principle, the main curve was constructed to study the viscoelastic properties of asphalt in a wider frequency domain. The main curve was fitted with the CAM model, and the rheological properties of different modified asphalt were evaluated through the analysis of model parameters. The creep stiffness and creep velocity of different modified asphalt were obtained through the rheological test of bending beam (BBR), and the low-temperature performance of different modified asphalt was analyzed by using Burgers model to fit the creep compliance. Findings The results show that the high temperature rheological properties of several modified asphalt studied in the test are ranked from best to worst as follows: PE modified asphalt > SBS modified asphalt > SBR modified asphalt. Short-term aging can improve the high temperature performance of asphalt, and different types of modifiers can promote or inhibit this improvement effect. Based on BBR test and Burgers model fitting analysis, SBR modified asphalt has the best low temperature performance, followed by SBS modified asphalt, while PE modified asphalt has poor low temperature performance, so it is not suitable to be used as road material in low temperature area. Originality/value Combined with effective evaluation methods, the rheological properties of asphalt at different temperatures and angles were systematically evaluated, and the evolution of rheological properties of asphalt characterized by model parameters was further analyzed by advanced model simulation.

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Section: Introductionmentioning

confidence: 99%