Theses and Dissertations

ORCID

https://orcid.org/0000-0003-3757-8693

Advisor

Howard, Isaac L.

Committee Member

Baumgardner, Gaylon L.

Committee Member

Sullivan, William G.

Committee Member

Wang, Jun

Date of Degree

5-16-2025

Original embargo terms

Immediate Worldwide Access

Document Type

Dissertation - Open Access

Major

Engineering (Civil Engineering)

Degree Name

Doctor of Philosophy (Ph.D.)

College

James Worth Bagley College of Engineering

Department

Richard A. Rula School of Civil and Environmental Engineering

Abstract

The objective of this dissertation is to provide content through which industry and agencies can adjust and/or update standards and specifications, as appropriate, to accommodate the present-day needs of the asphalt industry towards producing more durable asphalt. A total of 78 asphalt mixtures and 9 asphalt binders were evaluated for up to 10 years of field aging to provide content that was analyzed to meet this objective. A full-scale aging site in Columbus, Mississippi was the focal point of the aging experiments. A major conclusion from this work was that Cantabro Mass Loss (CML) testing of cores was able to detect field aging for up to 10 years. It was also concluded that AASHTO R28 is capable of simulating over 5 years of field aging with 20 pressure aging vessel (PAV) hours at 100 degrees Celsius, at least for some conditions, away from the pavement surface. AASHTO R28 was not capable of simulating over about 2 years for these same conditions within 1.3 cm of the pavement surface. This dissertation produced a table of recommendations for manners to update the field aging simulation appendix of AASHTO T 401 that makes use of CML testing. Overall, this dissertation aimed to provide a unique contribution to the asphalt paving field by way of measurable outcomes toward ongoing work on AASHTO T 401 and the potential to provide data that could be useful relative to ongoing AASHTO R28 narratives to produce more durable asphalt mixes.

Sponsorship (Optional)

Ergon Asphalt & Emulsions Distinguished Doctoral Fellowship in Construction Materials

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