Research on the linear viscoelastic rheological properties of rejuvenated asphalt mastic based on the discrete element method

• Autorzy: Lin Mei , Lei Yu , Li Ping , Shuai Jun , Wang Zhaoli

Identyfikatory

DOI

10.24425/ace.2023.145275

• Języki publikacji: EN

Abstrakty

EN

The rheological property of asphalt is an important factor affecting the pavement performance of asphalt binder, and the fundamental reason for the change of asphalt rheological property is the strong evolution of asphalt material meso structure. However, the internal mechanism of rejuvenated asphalt mastic system is complex and its rules are difficult to grasp. Aiming to study the relationship between meso mechanical parameters and rheological parameters of rejuvenated asphalt mastic, the meso structure model of rejuvenated asphalt mastic was established and improved based on the discrete element method. Moreover, the meso parameters of the model were obtained by the objective function method, and then the influences of various factors were studied to construct the mathematical constitutive model of rheological parameter modulus and meso mechanical parameters. Combing with the reliability of the improved Burgers model was verified based on the rheological test results of rejuvenated asphalt mastic. In addition, the virtual test of dynamic shear rheological dynamic frequency scanning was carried out on the asphalt mastic sample by particle flow software. By adjusting the mesomechanical parameters, the simulation results (complex shear modulus and phase angle) were consistent with the test results. This study clarified the relationship between mesomechanics and macro performance, and this model could be used to obtain the complex shear modulus of rejuvenated asphalt mastic under different types, filler-asphalt ratio and external force environments by adjusting particle flow, wall boundary and other conditions, which can greatly save the workload for the later research and provide a theoretical basis for production experiments.

Słowa kluczowe

EN

constitutive model; discrete element method; rejuvenated asphalt mastic; rheological characteristics

PL

model konstytutywny; metoda elementów dyskretnych; mastyks asfaltowy odnowiony; właściwości reologiczne

• Wydawca: Komitet Inżynierii Lądowej i Wodnej PAN ; Politechnika Warszawska, Wydział Inżynierii Lądowej
• Czasopismo: Archives of Civil Engineering
• Rocznik: 2023
• Tom: Vol. 69, nr 2
• Strony: 399--416
• Opis fizyczny: Bibliogr. 35 poz., il., tab.

Twórcy

autor

Lin Mei

• School of Civil Engineering, Lanzhou University of Technology, Lanzhou, China

• https://orcid.org/0000-0002-5348-3769

autor

Lei Yu

• School of Civil Engineering, Lanzhou University of Technology, Lanzhou, China

• https://orcid.org/0000-0001-9836-351X

autor

Li Ping

• School of Civil Engineering, Lanzhou University of Technology, Lanzhou, China

• https://orcid.org/0000-0001-5963-3679

autor

Shuai Jun

• School of Civil Engineering, Lanzhou University of Technology, Lanzhou, China

• https://orcid.org/0000-0002-4187-7250

autor

Wang Zhaoli

• Gansu Road and Bridge Green Smart Construction Technology Industry Research Institute, Lanzhou, China

• https://orcid.org/0000-0002-4073-5250

Bibliografia

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