不同温拌剂对高黏沥青流变及微观特性影响研究

doi:10.11896/cldb.22010171

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Abstract High-viscosity asphalt has been widely used in China. It is quite common to use warm mix agents to improve the workability for high-viscosity asphalt. However, not many researches have been conducted to investigate the influence of warm mix agents on the rheological and micro properties of high-viscosity asphalt. In this paper, the Brookfield test is first conducted to determine the optimum dosage of different warm mix agents (ACMP, Sasobit, WCO, Evotherm) for high-viscosity asphalt. The microscopic property changes brought by the warm mix agents are investigated using FTIR. Then the temperature sweep test, creep test and linear amplitude sweep test (LAS) were used to study the influence on the rheological properties of high viscosity asphalt. The research results show that Sasobit is a waxy warm mix agent, which shows crystalline state when the temperature is lower than the melting point. This improves the high-temperature performance and creep recovery performance of high-viscosity asphalt but decreases the low-temperature performance and fatigue resistance. Evotherm is a quaternary ammonium salt surfactant. It changes the surface tension between asphaltene molecules, which has adverse effects on the high-temperature performance and fatigue resistance of high-viscosity asphalt. ACMP and WCO are basically lubricants, and their addition improves the fatigue resistance of high-viscosity asphalt. Based on the evaluation on the physical properties, rheological properties, and microscopic properties, ACMP might be recommended.

Key words： warm mixing agent high-viscosity asphalt FT-IR temperature sweep linear amplitude sweep test

Published: 25 August 2023 Online: 2023-08-14

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), and Chengdu Technological Innovation R & D Project (2021-YF05-01175-SN).

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	Articles by authors
	WANG Yanlei
	LU Jun
	LIANG Pengfei
	LUO Ting
	YAN Chuanqi

Cite this article:

WANG Yanlei,LU Jun,LIANG Pengfei, et al. Influence of Different Warm Mix Agents on Rheological and Microscopic Properties of High-viscosity Asphalt[J]. Materials Reports, 2023, 37(16): 22010171-6.

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http://www.mater-rep.com/EN/10.11896/cldb.22010171 OR http://www.mater-rep.com/EN/Y2023/V37/I16/22010171

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