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Corresponding Author

蒋宇,男,硕士,助理工程师.E-mail:jiangyusx@163.com

Abstract

Through dynamic modulus tests at different temperatures and loading frequencies, the dynamic mechanical properties of base asphalt and SBS-modified asphalt mixed with RH-type and Evo-type warm mix agents were studied. At the same time, the displacement factor at reference temperature was determined according to the time-temperature equivalent principle, and the master dynamic modulus curves of the warm mixed base asphalt mixture and the warm mixed SBS-modified asphalt mixture were fitted by the Sigmoial function. The results show that: ① At different temperatures and loading frequencies, the distribution of dynamic modulus and phase angle of warm mixed SBS-modified asphalt mixture is more concentrated than that of warm mixed base asphalt mixture, or in other words, the performance of warm mixed SBS-modified asphalt mixture is more stable. ② According to the master dynamic modulus curve with rutting factor at 50 °C and reference temperature at 20 °C at 0.01 Hz, the high temperature performance of the base asphalt mixture is improved after adding warm mix agents, while that of SBS-modified asphalt mixture is decreased. ③ In view of the environmental protection and mechanical properties, it is recommended to use an RH-type warm mix agent in the base asphalt mixture and Evo-type warm mix agent in the SBS-modified asphalt mixture.

Publication Date

1-18-2024

DOI

10.14048/j.issn.1671-2579.2022.06.041

First Page

215

Last Page

219

Submission Date

May 2025

Reference

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