Effect of Solid Waste Filler on Fatigue Property of Modified Asphalt During Aging Process

Abstract

Abstract: To find the effect of adding solid waste filler on the fatigue property of modified asphalt, and then explore the effect of solid waste filler on the aging behavior of modified asphalt. This study used red mud, fly ash, diatomite and limestone powder to prepare four types of modified asphalt mortar. The fatigue properties of the original asphalt mortar and aged asphalt mortar were tested by linear amplitude sweep test (LAS), respectively. Four types of indicators were used in this article to evaluate the fatigue property of tested samples, including the damage accumulation (D(t)), integrity index (C(t)), strain sensibility (B) and fatigue life. Besides, the aging-fatigue decay index was selected in this study to indicate the negative effect of aging on asphalt mortar. The test results show that the addition of solid waste filler improves the fatigue property of modified asphalt during the aging process, namely, it enhances the aging resistance of modified asphalt. The level of improvement is listed from high to low as follows: diatomite, red mud, limestone powder, fly ash. Besides, adding solid waste filler not only hardens the asphalt but also fills the crack, both effects compete and determine the fatigue property jointly.

Key words: modified asphalt mortar, solid waste, red mud, fatigue property, aging process, linear amplitude sweep, particle filling

CLC Number:

TU535

GUO Bingbing, JIA Xuemei, ZHANG Hengji, LIU Liyuan. Effect of Solid Waste Filler on Fatigue Property of Modified Asphalt During Aging Process[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(8): 2822-2830.

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