偶联表面处理咖啡渣粉改性沥青的高温流变特性及储存稳定性

doi:10.11896/cldb.25020128

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Abstract To develop new ways for the effective resource utilization of discarded coffee grounds and study new surface treatment technologies, waste coffee grounds were surface-treated with a silane coupling agent solution (KH550) to prepare modified asphalt with different coffee grounds contents (3%, 6%, 9%, and 12%). Through tests such as conventional performance, high temperature viscosity, softening point difference, and high temperature rheology, the influence of the coupling surface modified coffee grounds on the high temperature rheological properties and storage stability of asphalt was studied. Moreover, scanning electron microscopy and infrared spectroscopy were used to test and analyze the modification mechanism. The results show that surface treatment can improve the high-temperature performance of coffee ground modified asphalt and significantly improve its storage stability. Compared with the original asphalt, the softening point of the coupling surface-treated coffee ground modified asphalt is increased by 22.1%, the viscosity at 135 ℃ is increased by 116%, and the rutting factor at 52 ℃ is increased by 56.3%. After surface treatment, the surface of coffee grounds is rougher and has better compatibility with asphalt. It is a physical mixture with asphalt. However, surface treatment has no obvious improvement on the low-temperature performance of coffee ground modified asphalt. The use of surface-treated coffee ground modified asphalt has good economic and environmental benefits. Considering comprehensively, the recommended contents of coffee grounds and surface-treated coffee grounds in asphalt are 9% and 12%, respectively.

Key words： coffee grounds silane coupling agent modified asphalt rheological performance at high temperature storage stability

Published: 10 March 2026 Online: 2026-03-10

CLC number:

U414

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	Articles by authors
	GAO Yingli
	HUANG Guotai
	LI Yunbo
	ZHU Juncai

Cite this article:

GAO Yingli,HUANG Guotai,LI Yunbo, et al. High Temperature Rheological Properties and Storage Stability of Coffee Grounds Powder Modified Asphalt by Coupling Surface Treatment[J]. Materials Reports, 2026, 40(5): 25020128-8.

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https://www.mater-rep.com/EN/10.11896/cldb.25020128 OR https://www.mater-rep.com/EN/Y2026/V40/I5/25020128

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