Theses and Dissertations

Author

Amanda Hufft

Issuing Body

Mississippi State University

Advisor

Howard, Isaac L.

Committee Member

Hassan, El Barbary

Committee Member

French, W. Todd

Date of Degree

12-1-2019

Document Type

Graduate Thesis - Open Access

Abstract

This thesis is focused on determining the durability characteristics of asphalt mixtures containing bio-based additives for the purpose of more effective use of recycled materials. Fifty mixtures were evaluated by Cantabro Mass Loss testing in their virgin state, after 1 year of field aging, and after laboratory conditioning to determine the effectiveness of bioditives in dense graded asphalt and sand asphalt mixtures. Key findings from this work demonstrated that considerable amounts of recycled asphalt shingles (i.e. 5% of the total mixture) significantly affect the brittleness of dense graded asphalt mixtures when used in conjunction with reclaimed asphalt pavement (RAP). Furthermore, brittleness was not improved with the use of bioditives at high dosages (e.g. greater than 7.5% of the total binder content), but was improved in some cases at lower dosage rates (e.g. 2.5-5%). Additional testing of similar mixtures and bioditives evaluated in this thesis are recommended.

URI

https://hdl.handle.net/11668/16443

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