Theses and Dissertations

Issuing Body

Mississippi State University

Advisor

Shmulsky, Rubin

Committee Member

Seale, R. Daniel

Committee Member

Street, Jason Tyler

Committee Member

Lopes. Dercilio Verly

Date of Degree

5-11-2022

Document Type

Dissertation - Open Access

Major

Forest Resources

Degree Name

Doctor of Philosophy (Ph.D)

College

College of Agriculture and Life Sciences

Department

Department of Sustainable Bioproducts

Abstract

This work is made up of three parts. Part one looks to establish design values for two types of three ply access mats from the U.S. South and Midwest. The mats were subject to 3 point bending tests to determine strength and stiffness values. Values for MOE (Modulus of Elasticity) and MOR (Modulus of Rupture) are reported by region and mat design. Part two tested five species groups of hardwoods for wear resistance and hardness. These species groups include white oak, red oak, ash, sweetgum and hickory. These tests for wear were performed on a Navy-Type Wear Tester according to ASTM D2394-17. Hardness specimens were tested with the Janka method according to ASTM D143-14. The third and final part looks at the impact of thermomechanical densification on rate of wear in five species groups of hardwood. The species groups were white oak, red oak, ash, sweetgum and hickory. Samples were pressed at 1000psi at temperature of 350 degrees Fahrenheit, in order to plasticize the wood and densify it at the same time. These samples were then tested on the Navy-Type Wear Tester to determine whether densification had an impact on wear resistance.

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