Study on high-temperature performance evaluation of asphalt mixtures with anti-rutting additives

Gang Tian; Ying Gao; Conglin Chen; Qin Ye; Gang Tian; Ying Gao; Conglin Chen; Qin Ye

doi:10.3934/era.2024008

Electronic Research Archive

2024, Volume 32, Issue 1: 160-173. doi: 10.3934/era.2024008

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Study on high-temperature performance evaluation of asphalt mixtures with anti-rutting additives

1.
National Engineering Research Center of Advanced Road Materials, Nanjing 211112, China
2.
School of Transportation, Southeast University, Nanjing 211189, China
3.
JSTI Group Co., Ltd., Nanjing 210019, China

Academic Editor: Hui Yao

Received: 11 October 2023 Revised: 23 November 2023 Accepted: 05 December 2023 Published: 18 December 2023

In order to investigate the asphalt mixture enhancement due to the granular anti-rutting additives, the multiple stress creep recovery (MSCR) test and wheel tracking test were performed to examine the effects of three anti-rutting additives on the high-temperature performance of binders and mixtures, respectively. Further, the interaction mechanism between anti-rutting additives and asphalt binder was revealed via a fluorescence microscopy (FM) test. The results indicate that the incorporation of anti-rutting additives causes a substantial increase in elasticity behavior for binders, along with a massive enhancement of dynamic stability for mixtures. Further, the enhancement of performance is not conclusively determined by the compatibility between the additive and asphalt. Instead, unmelted viscous-flow additives contribute to the enhancement of mixtures by interlocking, filling voids, cementing and wrapping the aggregate, which are essential mechanisms of mixture modification. This study contributes to selecting appropriate additives in engineering and enhancing anti-rutting additives based on their modification mechanism.
- modified asphalt mixture,
- granular anti-rutting additive,
- mechanism of interaction,
- high-temperature performance,
- FM test,
- MSCR test,
- wheel tracking test
Citation: Gang Tian, Ying Gao, Conglin Chen, Qin Ye. Study on high-temperature performance evaluation of asphalt mixtures with anti-rutting additives[J]. Electronic Research Archive, 2024, 32(1): 160-173. doi: 10.3934/era.2024008

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Abstract

In order to investigate the asphalt mixture enhancement due to the granular anti-rutting additives, the multiple stress creep recovery (MSCR) test and wheel tracking test were performed to examine the effects of three anti-rutting additives on the high-temperature performance of binders and mixtures, respectively. Further, the interaction mechanism between anti-rutting additives and asphalt binder was revealed via a fluorescence microscopy (FM) test. The results indicate that the incorporation of anti-rutting additives causes a substantial increase in elasticity behavior for binders, along with a massive enhancement of dynamic stability for mixtures. Further, the enhancement of performance is not conclusively determined by the compatibility between the additive and asphalt. Instead, unmelted viscous-flow additives contribute to the enhancement of mixtures by interlocking, filling voids, cementing and wrapping the aggregate, which are essential mechanisms of mixture modification. This study contributes to selecting appropriate additives in engineering and enhancing anti-rutting additives based on their modification mechanism.

References

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