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<p>Asphalt performance improves with the incorporation of various additives and with the time factor. In this study, the effect of time on asphalt mixtures (AM) containing styrene–butadiene–styrene (SBS) and sargassum particles (SGP) is analyzed. The composites were prepared by the melt method, using five part hundred rubber (phr) of SGP and polymeric matrices of SBS with low and high vinyl content. The asphaltic mixtures were made with 3% percent&#xa0;by weight (wt%) of these composites, identified as high vinyl asphalt mix (AMH) and low vinyl asphalt mix (AML), respectively. Temperature sweep tests were carried out within linear viscoelastic region (LVR), with measurements taken at 1, 7, 14, and 82&#xa0;days after mixing. The parameters studied include the viscoelastic behavior in the black diagrams, the effect of heavy traffic on the isochronous comples modulus-phase angle-temperature (G*)–δ–T curves, and the rutting factor with the parameter complex modulus between delta sine (G*/sin δ). In conclusion, the AMH asphalt mix shows the best rheological performance after 82&#xa0;days of mixing.</p> Graphical abstract <p></p>

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Effect of time on the rheological behavior of asphalt mixtures modified with sargassum and SBS compounds of varying vinyl content

  • 期刊论文

  • 发表日期：

    2025年2月10日

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  • Beatriz A. Salazar-Cruz,
  • Gabiel Hernández-Zamora,
  • José L. Rivera-Armenta,
  • Cynthia G. Flores-Hernández,
  • Edgar Onofre-Bustamante

摘要

Asphalt performance improves with the incorporation of various additives and with the time factor. In this study, the effect of time on asphalt mixtures (AM) containing styrene–butadiene–styrene (SBS) and sargassum particles (SGP) is analyzed. The composites were prepared by the melt method, using five part hundred rubber (phr) of SGP and polymeric matrices of SBS with low and high vinyl content. The asphaltic mixtures were made with 3% percent by weight (wt%) of these composites, identified as high vinyl asphalt mix (AMH) and low vinyl asphalt mix (AML), respectively. Temperature sweep tests were carried out within linear viscoelastic region (LVR), with measurements taken at 1, 7, 14, and 82 days after mixing. The parameters studied include the viscoelastic behavior in the black diagrams, the effect of heavy traffic on the isochronous comples modulus-phase angle-temperature (G*)–δ–T curves, and the rutting factor with the parameter complex modulus between delta sine (G*/sin δ). In conclusion, the AMH asphalt mix shows the best rheological performance after 82 days of mixing.

Graphical abstract