煤矸石粉与沥青的交互作用评价及其微观机理研究

doi:10.11896/cldb.21040248

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Abstract The interaction between mineral fillers and asphalt determines the road performance of asphalt mixture. In order to evaluate the interaction ability between coal gangue powder and asphalt, and reveal the interaction mechanism, rheological properties of coal gangue powder asphalt mastic were investigated by means of the dynamic shear rheometer (DSR) test. Master curves of dynamic shear modulus of asphalt mastic were constructed by generalized sigmoidal function and WLF equation. The interaction ability between coal gangue powder and asphalt was evaluated based on the coefficient C of Palierne model. A parameter fitting method was proposed to weaken the dependence of C value on the volume fraction of coal gangue powder. The interaction micro-mechanism was analyzed by using SEM and AFM experiment. The results show that coal gangue powder exhibits a stronger interaction ability with asphalt than limestone powder by the comparison of coefficient C. Coarse surface and open pores of coal gangue powder are easier to form interlocking interface with asphalt. Asphalt mastic produces more bee structures than base asphalt due to the interaction between coal gangue powder and asphalt, and forms a dense network structure system, so that coal gangue powder has a stronger interaction ability with asphalt.

Key words： road engineering coal gangue powder asphalt mastic interaction micro-mechanism

Published: 25 November 2022 Online: 2022-11-25

CLC number:

U414

Fund:China Postdoctoral Science Foundation(2020M670731), National Natural Science Foundation of China (51308084), and Natural Science Foundation of Liaoning Province, China (20180550173).

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	Articles by authors
	WANG Zhichen
	GUO Naisheng
	JIN Xin
	YU Ankang

Cite this article:

WANG Zhichen,GUO Naisheng,JIN Xin, et al. Study on Interaction Evaluation and Its Micro-mechanism of Coal Gangue Powder and Asphalt[J]. Materials Reports, 2022, 36(22): 21040248-7.

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http://www.mater-rep.com/EN/10.11896/cldb.21040248 OR http://www.mater-rep.com/EN/Y2022/V36/I22/21040248

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