高掺量废胎胶粉改性沥青性能研究

doi:10.11896/cldb.21120239

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Abstract The waste tire rubber powder made from waste tires can be used to prepare rubber asphalt, which can realize the resource utilization of waste tires in pavement. In this work, asphalt samples modified by waste tire rubber powder with different aromatic oil contents, reaction temperatures and reaction times were prepared. The solubility test was designed and combined with scanning electron microscope (SEM) test to study the correlation between the reaction degree of rubber powder and the storage stability. The change trends of penetration, ductility, softening point, elastic recovery and high temperature viscosity indexes of rubber asphalt in the reaction process were tested, and the index values were compared with those of matrix asphalt, SBS modified asphalt and medium/high content rubber asphalt without aromatic oil, so as to determine the preparation parameters of high content rubber asphalt with aromatic oil. The results show that adding aromatic oil effectively improves the storage stability of 35% rubber asphalt and ensures its workability of construction. Rutting factor ratio is more suitable to evaluate the storage stability of high content rubber asphalt than softening point difference index. The solubility of high content rubber asphalt has an obvious correlation with its storage stability. The addition of aromatic oil has an adverse effect on high and low temperature performances of 35% rubber asphalt, but when the content of aromatic oil is within 5%—7.5%, its high and low temperature performance is still close to SBS modified asphalt. The preparation parameters of high content waste tire rubber asphalt can be determined as follows: the shear speed is 800 r/min, the content of waste tire rubber powder and aromatic oil is 35% and 5%—7.5% of the total mass of rubber asphalt respectively, the reaction temperature is 230 ℃, and the reaction time is 225 min.

Key words： aromatic oil high content waste tire rubber powder preparation parameters rubber asphalt

Published: 25 August 2022 Online: 2022-08-29

CLC number:

U414

Fund:National Natural Science Foundation of China (51808116) and Fundamental Research Funds for the Central Universities (2242021R41132).

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	Articles by authors
	XU Guangji
	FAN Jianwei
	MA Tao
	ZHU Yajing
	LI Shuren

Cite this article:

XU Guangji,FAN Jianwei,MA Tao, et al. Study on Performances of Asphalt Modified by High Content Waste Tire Rubber Powder[J]. Materials Reports, 2022, 36(16): 21120239-8.

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http://www.mater-rep.com/EN/10.11896/cldb.21120239 OR http://www.mater-rep.com/EN/Y2022/V36/I16/21120239

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