Influence of Guayule Resin as a Bio-Based Additive on Asphalt-Rubber Binder at Elevated Temperatures
Abstract
This study seeks to find the influence of replacing a portion of the asphalt–rubber binder with the bio-based material “guayule resin.” This replacement could be beneficial in terms of sustainability, economics, and environmental concerns related to the asphalt industry. Nine asphalt-rubber-guayule binders were investigated to find their rheological properties. Consecutively, the study proceeded with five selected binders being compared to the original asphalt (PG64-22). Investigations underwent whole matrices (crumb rubber modifier (CRM) residue included) and liquid phases (CRM residue extracted). Additionally, these properties were partially sought for their corresponding asphalt–rubber binders to compare and judge the contribution of the guayule resin. Likewise, a thermo-gravimetric analysis was done for the guayule resin to recognize its moisture and composition complexity. Such an analysis was also done for the as-received CRM and some extracted CRMs to determine the release and residue of rubber components. Outcomes showed that the guayule resin has the potential to compensate the performance required against the original asphalt at elevated temperatures while greatly decreasing the asphalt cement proportion. For instance, a blend of 62.5% asphalt, 12.5% CRM, and 25% guayule resin provided better performance than that of the original asphalt.
Recommended Citation
A. Hemida and M. Abdelrahman, "Influence of Guayule Resin as a Bio-Based Additive on Asphalt-Rubber Binder at Elevated Temperatures," Recycling, vol. 4, no. 3, MDPI, Sep 2019.
The definitive version is available at https://doi.org/10.3390/recycling4030038
Department(s)
Civil, Architectural and Environmental Engineering
Research Center/Lab(s)
Center for Research in Energy and Environment (CREE)
Keywords and Phrases
Asphalt-Rubber; BGR; Bio-Based; CRM; CRMA; Guayule; Master Curve; Modified Asphalt; Interrupted Shear Flow; TGA
International Standard Serial Number (ISSN)
2313-4321
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2019 The Authors, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution 4.0 License.
Publication Date
01 Sep 2019