富油沥青砂浆再生设计与性能恢复规律研究

doi:10.11896/cldb.22100098

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Abstract Because of the low utilization rate and unstable performance of recycled asphalt mixtures, this paper focused on therich-binder fine aggregate and investigated the recovery law of rejuvenators on the performance of recycled asphalt mortar. First, the paper evaluated the bitumen content of rich-binder fine aggregate as well as the aging level of reclaimed bitumen. We used rich-binder fine aggregate to product recycled asphalt mortars and explore the contribution of rejuvenators on their performance. Evaluation methods which including dynamic shear rheometer, bending beam rheometer, direct tensile test, and uniaxial compression test were employed to investigate the recovery regulations of recycled asphalt mortars in high-temperature deformation resistance, low-temperature cracking resistance, fatigue life, and deformation coordination. Compared with ordinary asphalt mortar, the compressive strength and complex modulus of recycled asphalt mortar were significantly improved, but its cracking resistance at low temperature and fatigue life decline seriously. Because of the softening effect of rejuvenators on aged bitumen, the rheological behavior, low-temperature cracking resistance and fatigue life of the recycled asphalt mortar were obviously recovered, and the deformation coordination of the recycled asphalt mortar improved as well.

Key words： reclaimed asphalt mixture asphalt mortar rejuvenator rheological performance fatigue life

Published: Online: 2023-12-19

CLC number:

U414

Fund:National Natural Science Foundation of China (51908331), Natural Science Foundation of Shandong Province (ZR2019BEE004), Shandong Provincial Transportation Science and Technology Plan(2020B66).

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	Articles by authors
	ZHANG Jizhe
	GUO Chenchen
	HU Xueliang
	HE Liang
	LYU Xin
	FAN Chao
	YAO Zhanyong

Cite this article:

ZHANG Jizhe,GUO Chenchen,HU Xueliang, et al. Study on Rejuvenating Design and Property Recovery of Reclaimed Rich-binder Asphalt Mortar[J]. Materials Reports, 2023, 37(24): 22100098-7.

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http://www.mater-rep.com/EN/10.11896/cldb.22100098 OR http://www.mater-rep.com/EN/Y2023/V37/I24/22100098

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