High-Temperature Rheological and Molecular Dynamics Analysis of Asphalt Modified with SiC Filler DOI

Myeong-Jun Song,

Ying Gao, Guangyao Li

и другие.

Langmuir, Год журнала: 2025, Номер unknown

Опубликована: Апрель 25, 2025

This study aims to address the increasingly complex environmental demands by enhancing high-temperature durability of asphalt pavements during service, on effect and mechanism silicon carbide (SiC) ceramic micropowder performance modified asphalt. The rheological properties modification SiC-modified were analyzed using Saturates, Aromatics, Resins, Asphaltenes (SARA) fraction analysis, viscosity tests, dynamic shear (DSR) Fourier transform infrared spectroscopy (FTIR), molecular dynamics (MD) simulations. results show that SiC micropowder, with its high specific surface area rich porous structure, effectively adsorbs lighter components asphalt, significantly improving stability. Rheological tests demonstrate increases rutting factor a 34.74% improvement in G*/sin δ at 60 °C, indicating marked enhancement performance. FTIR spectra confirm is physical process, as no new functional groups formed. MD simulations reveal interfacial energy between negative, an attractive interaction two phases. selective adsorption SARA fractions follows order: aromatics > resins saturates asphaltenes, which promotes aggregation surface, altering composition In conclusion, interactions characteristics enhance provides theoretical foundation for practical application environments offers valuable insights engineering applications.

Язык: Английский

High-Temperature Rheological and Molecular Dynamics Analysis of Asphalt Modified with SiC Filler DOI

Myeong-Jun Song,

Ying Gao, Guangyao Li

и другие.

Langmuir, Год журнала: 2025, Номер unknown

Опубликована: Апрель 25, 2025

This study aims to address the increasingly complex environmental demands by enhancing high-temperature durability of asphalt pavements during service, on effect and mechanism silicon carbide (SiC) ceramic micropowder performance modified asphalt. The rheological properties modification SiC-modified were analyzed using Saturates, Aromatics, Resins, Asphaltenes (SARA) fraction analysis, viscosity tests, dynamic shear (DSR) Fourier transform infrared spectroscopy (FTIR), molecular dynamics (MD) simulations. results show that SiC micropowder, with its high specific surface area rich porous structure, effectively adsorbs lighter components asphalt, significantly improving stability. Rheological tests demonstrate increases rutting factor a 34.74% improvement in G*/sin δ at 60 °C, indicating marked enhancement performance. FTIR spectra confirm is physical process, as no new functional groups formed. MD simulations reveal interfacial energy between negative, an attractive interaction two phases. selective adsorption SARA fractions follows order: aromatics > resins saturates asphaltenes, which promotes aggregation surface, altering composition In conclusion, interactions characteristics enhance provides theoretical foundation for practical application environments offers valuable insights engineering applications.

Язык: Английский

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