Theses and Dissertations
ORCID
https://orcid.org/0009-0004-6569-8988
Advisor
Ragon, Kevin
Committee Member
Shmulsky, Rubin
Committee Member
Mohammadabadi, Mostafa
Committee Member
Street, Jason
Date of Degree
5-15-2026
Original embargo terms
Immediate Worldwide Access
Document Type
Dissertation - Open Access
Major
Forest Resources (Sustainable Bioproducts)
Degree Name
Doctor of Philosophy (Ph.D.)
College
College of Forest Resources
Department
Department of Sustainable Bioproducts
Abstract
This research integrates material modification, preservative performance, and engineered fabrication to enhance the long-term durability and structural reliability of southern pine and sweetgum for outdoor and structural applications. The first project investigates the effects of simulated checks and splits on the strength and stiffness of southern pine fence posts. By introducing controlled defects and conducting mechanical testing, the study quantifies reductions in load-carrying capacity and evaluates how defect severity influences structural performance. The results provide insight into service life prediction and grading considerations for in-ground applications. The second project evaluates water ingress behavior in creosote-treated sweetgum using wetting angle measurements following accelerated weathering. Varying creosote retention levels are compared to determine their influence on surface wettability and moisture resistance. Changes in wetting angle over time are used to assess hydrophobic degradation and its implications for durability and dimensional stability. The third project focuses on the fabrication and characterization of Mass Timber Compole (MTC) manufactured from small-diameter southern pine trees. Mechanical testing, bonding performance, and structural evaluation are conducted to determine the feasibility of utilizing underutilized timber resources in engineered mass timber systems. Collectively, these projects advance understanding of defect tolerance, preservative effectiveness, and innovative fabrication strategies to improve wood durability and structural performance.
Sponsorship (Optional)
USDA ARS Agreement No. Â 58-0204-1-178
Recommended Citation
Ahmmed, Ershad, "Improving durability and structural integrity of southern pine and sweetgum through fabrication, treatment, and mechanical testing." (2026). Theses and Dissertations. 6858.
https://scholarsjunction.msstate.edu/td/6858
