粉胶比对煤直接液化残渣复合改性沥青胶浆及混合料低温性能的影响

doi:10.11896/cldb.23090053

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Abstract The objective of this paper is to investigate the low-temperature performance of direct coal liquefaction residue(DCLR) composite modified asphalt mortar and mixtures with different filler to asphalt ratios. Evaluation of the performance of three types of asphalt mortar and mixtures(SK-90 asphalt mastics and mixtures, DCLR modified asphalt mastics and mixtures, DCLR composite modified asphalt mastics and mixtures) with four types of filler to asphalt ratio(0.6, 0.8, 1.0, 1.2) using the BBR test, the low-temperature trabecular beam test, the SCB test, and the contact angle test. The test results show that: DCLR composite modified asphalt mortar critical damage temperature is significantly reduced, the damage strain of the mixture is significantly improved, compared with the DCLR modified asphalt mortar and mixture, the low-temperature performance has been significantly improved, basically reaching the SK-90 asphalt mortar and mixture of the low-temperature performance level. Comprehensive results of various tests, three kinds of mixtures filler to asphalt ratio of 1.0 when the low-temperature performance is optimal. DCLR composite modified asphalt mixtures show better low-temperature stress relaxation ability, resistance to cracking ability and crack development ability is stronger. However, it is more sensitive to the change of filler to asphalt ratio and is not easy to resist the expansion of low-temperature cracks. When the filler to asphalt ratio is increased to 1.2, the low-temperature cracking resistance of the mixture and the crack development resistance is significantly reduced.

Key words： road engineering direct coal liquefaction residue filler to asphalt ratio asphalt mortar asphalt mixture low-temperature perfor-mance

Published: 25 November 2024 Online: 2024-11-22

CLC number:

U414

Fund:National Natural Science Foundation of China (52078025), National Key R & D Program of China (2021YFB2601200), the Project of Construction and Support for High-level Innovative Teams of Beijing Municipal Institutions (BPHR20220109), and the BUCEA Post Graduate Innovation Project (PG2023043).

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	JI Jie
	ZHANG Ziyuan
	WEN Long
	YOU Pengchao
	MA Tong
	HUANG Changwei

Cite this article:

JI Jie,ZHANG Ziyuan,WEN Long, et al. Effect of Filler to Asphalt Ratio on Low-temperature Performance of Direct Coal Liquefaction Residue Composite Modified Asphalt Mortar and Mixture[J]. Materials Reports, 2024, 38(22): 23090053-7.

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http://www.mater-rep.com/EN/10.11896/cldb.23090053 OR http://www.mater-rep.com/EN/Y2024/V38/I22/23090053

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