不同温拌剂对高黏沥青老化性能的影响

doi:10.11896/cldb.22120076

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Abstract To examine the effect of different warm mixes on the aging performance of high viscosity asphalt, the compaction temperature drop of approximately 10 ℃ for different warm mixes on high viscosity asphalt was used as a standard to determine the amount of different warm mixes required. According to the specification requirements for short-term and long-term aging, and then through the temperature sweep, creep recovery test, LAS test to study the effect of different warm mixes on the aging of high viscosity asphalt viscoelasticity, creep recovery performance and other rheological properties, and the study was combined with infrared spectroscopy and fluorescence microscopy tests to analyze the mechanism. The study showed that the warm mixes Evotherm and Waste-Cooking-Oil (WCO) were oxidized and decomposed in the short-term aging stage due to their poor thermal stability, so the effect of these two on the aging performance of high-viscosity asphalt was mainly concentrated in the short-term aging stage, while the long-term aging stage had no effect on the performance of high-viscosity asphalt. In the short-term aging stage, the addition of warm mix Evotherm and WCO can enhance the mobility of high viscous asphalt, so that the high viscous asphalt aging degree deepened, asphalt creep recovery ability, fatigue resistance are reduced. The warm mix agent Sasobit is still present in the asphalt after aging due to its better anti-aging properties, which has a greater improvement on the asphalt creep recovery performance and makes the asphalt fatigue resistance increase under small strains, while fluorescence microscopy shows that the warm mix agent Sasobit can associate with the SBS particles uniformly distributed in the asphalt at room temperature to form a mesh lattice structure, which makes the high viscosity asphalt have stronger High temperature stability.

Key words： warm mixes aging performance FM viscoelasticity

Published: 10 July 2024 Online: 2024-08-01

CLC number:

U414.1

Fund:National Natural Science Foundation of China (52008353, 51908426), China Postdoctoral Science Foundation (BX20190240, 2019M660097), Sichuan Youth Science and Technology Innovation Research Team (2021JDTD0023, 2022JDTD0015), Chengdu Technological Innovation R&D Project (2021-YF05-01175-SN).

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	Articles by authors
	LUO Ting
	WANG Jiaxin
	XIE Bin
	AI Changfa
	YAN Chuanqi

Cite this article:

LUO Ting,WANG Jiaxin,XIE Bin, et al. Effect of Different Warm Mixes on the Aging Performance of High Viscosity Asphalt[J]. Materials Reports, 2024, 38(13): 22120076-9.

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http://www.mater-rep.com/EN/10.11896/cldb.22120076 OR http://www.mater-rep.com/EN/Y2024/V38/I13/22120076

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