Rheological Properties of Modified Asphalt With Warm-mixed Anti-rutting Agent

WANG Wei

doi:10.11936/bjutxb2021020014

Journal of Beijing University of Technology > 2022 > 48(2): 129-136. > DOI: 10.11936/bjutxb2021020014

WANG Wei. Rheological Properties of Modified Asphalt With Warm-mixed Anti-rutting Agent[J]. Journal of Beijing University of Technology, 2022, 48(2): 129-136. DOI: 10.11936/bjutxb2021020014

Citation:

WANG Wei. Rheological Properties of Modified Asphalt With Warm-mixed Anti-rutting Agent[J]. Journal of Beijing University of Technology, 2022, 48(2): 129-136. DOI: 10.11936/bjutxb2021020014

Citation:

WANG Wei. Rheological Properties of Modified Asphalt With Warm-mixed Anti-rutting Agent[J]. Journal of Beijing University of Technology, 2022, 48(2): 129-136. DOI: 10.11936/bjutxb2021020014

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Rheological Properties of Modified Asphalt With Warm-mixed Anti-rutting Agent

WANG Wei

Shanxi Transportation Technology Research & Development Co., Ltd., Taiyuan 030002, China

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Received Date: February 25, 2021
Revised Date: April 22, 2021
Available Online: August 03, 2022
Published Date: February 09, 2022

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Abstract

Abstract

Traditional anti-rutting agents are a kind of polymer additive with polyolefin as the main component. However, the poor compatibility between anti-rutting agent with asphalt binder is still a technical problem. To explore whether modified wax materials with good compatibility with asphalt and high melting point have the potential to be adopted in the preparation of warm-mixed anti-rutting agent, series of warm-mixed anti-rutting agents were obtained by mixing traditional polyolefin anti-rutting agents with high temperature wax in different proportions. Four kinds of anti-rutting agents were added with the dosage of 3%, 6%, and 9%, respectively, thus twelve modified asphalts were prepared with the above anti-rutting agents. Dynamic shear rheometer (DSR) was employed to perform the temperature sweep tests, frequency sweep tests and multiple stress creep recovery (MSCR) tests on the above asphalts. The aim of the tests was to analyze the influence of high temperature wax on the melt fluidity performance of anti-rutting agent and also identify suitable evaluation index for anti-rutting agent modified asphalt. Result shows that there is a linear correlation between wax content and melt mass-flow rate (MFR). When the temperature is below the melting point of high temperature wax, MFR decreases as the proportion of high-temperature wax increases. When the temperature is higher than the melting point, MFR increases as the proportion increases. In view of the high melting point of wax mass component, the addition of high temperature wax could help to improve the high temperature performance of anti-rutting agent modified asphalts. The higher ratio of wax in warm-mixed anti-rutting agent, the better the high temperature performance of modified asphalts. Warm-mixed anti-rutting agent with 30% wax content has the best improvement on the high temperature performance of modified asphalts in this study.As to the high elastic characteristics of anti-rutting agent modified asphalt, rutting factor and J_nr3.2 are more suitable to be adopted as high temperature performance evaluation indicators among different rheological evaluation parameters.
- anti-rutting agent,
- high temperature wax,
- rutting factor,
- multiple stress creep recovery (MSCR),
- rheological analysis,
- melt mass-flow rate (MFR)

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References

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Rheological Properties of Modified Asphalt With Warm-mixed Anti-rutting Agent