Date of Award
1-1-2023
Document Type
Dissertation
Degree Name
Ph.D. in Engineering Science
First Advisor
Ahmed Al-Ostaz
Second Advisor
Ahmed Al-Ostaz
Third Advisor
Hunain Alkhateb
School
University of Mississippi
Relational Format
dissertation/thesis
Abstract
Asphalt is the most common material used for road construction; however, asphalt has its downsides. Asphalt roads deteriorate with time due to (age hardening) and susceptibility to moisture damage shortening asphalt roads’ service life span; Hence, asphalt roads need to be resurfaced every 15-20 years, depending on maintenance. Asphalt binder short comings can be remedied by incorporating graphene (GNPs) and modified graphene (MGNPs) into the asphalt binder matric. This research study the effect of different GNPs surface modification on asphalt binder properties and performance, with three main surface modifications; oxidation, octadecylamine and aminopropylIsooctyl POSS. It also suggests a different criterion to measure age hardening rate. Modifying GNPs is an important part of this research, with grafting relying on carboxyl group. Nitrating acid mixture method was also under study utilizing design of experiment. It was found that MGNPs improved rutting factor while reducing binder age hardening. Moreover, nitrating acid mixture method was found to produce moderate oxygen content with relatively low damage platelets with oxygen content depends on graphene grade used as precursor and nitric acid vol.%.
Recommended Citation
Sras, Oubayda, "Design and Evaluation of Graphene Additives for Asphalt Materials to Improve Load Carrying Capacity and Durability" (2023). Electronic Theses and Dissertations. 2585.
https://egrove.olemiss.edu/etd/2585