Theses and Dissertations

ORCID

https://orcid.org/0000-0001-6974-3433

Issuing Body

Mississippi State University

Advisor

Howard, Isaac L.

Committee Member

Rushing, Timothy W.

Committee Member

Gullett, Philip M.

Date of Degree

12-13-2024

Original embargo terms

Worldwide

Document Type

Graduate Thesis - Open Access

Major

Civil Engineering

Degree Name

Master of Science (M.S.)

College

James Worth Bagley College of Engineering

Department

Richard A. Rula School of Civil and Environmental Engineering

Abstract

This thesis aims to: 1) determine the effect of plate size on the modulus of subgrade reaction (k), 2) investigate the differences between the ASTM D1196-21 and CRD-C 655-95 plate load test methods, and 3) develop new effective k curves. 150 plate load tests were executed on three subgrade materials under varying base course thicknesses. Plate load testing was designed to evaluate various plate sizes and testing standards (e.g., the military standard – CRD-C 655-96 and the ASTM standard – ASTM D1196-21). By performing plate load tests on varying base course thicknesses, newly developed effective k curves were developed from this research. Overall, results show the ASTM standard produced higher k-values than the military standard. Although a smaller plate setup produced similar results, additional variability was introduced when using smaller plates.

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