Monitoring Separation Tendency of Partial Asphalt Replacement by Crumb Rubber Modifier and Guayule Resin

Abstract

Guayule resin was utilized as a partial asphalt replacer for sustainable, flexible pavement. This research aimed to study the effect of such an innovative replacer on asphalt-rubber separation tendency. The replacement denoted 25–75% triggering a binder competitive with conventional asphalt. Upon Stoke’s law, viscosity variation between asphalt and guayule was dominant, which affected the rubber particle sedimentation. A binder of 62.5% asphalt, 12.5% rubber, and 25% guayule provided better rheological behavior than that of conventional asphalt at elevated temperatures. Such a binder showed almost no liquid phase separation but poor storage stability in the whole matrix, after lab-simulated storage.

Department(s)

Civil, Architectural and Environmental Engineering

Keywords and Phrases

Asphalt rubber; Crumb rubber; FTIR; Guayule resin; Master curve; Phase separation; Storage stability; TGA

International Standard Serial Number (ISSN)

0950-0618; 1879-0526

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2020 Elsevier, All rights reserved.

Publication Date

10 Aug 2020

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