Masters Theses


"The specification and monitoring for quality control/quality assurance of compacted subgrades and base layers is a significant concern to engineers. Elastic moduli, though monitored less frequently by most DOTs than compaction, may provide a better indication of the quality of compacted base materials and pavements in road construction applications. The ability to gauge the condition of these materials during the construction process can improve the quality of the finished product.

In this investigation, the thermal conductivity of compacted low plastic silt was studied under varying moisture contents and densities. A KD2 Pro thermal properties analyzer was used to measure the thermal conductivity of the compacted soil specimen and compared to water content, bulk density, and elastic moduli. Correlations between the thermal conductivity and other material properties were studied.

A Light Falling Weight Deflectometer (LFWD) and Briaud Compaction Device (BCD) were utilized to determine the elastic moduli of several materials. The LFWD and BCD are non-destructive tests that can be used in the field as means of quickly determining the elastic moduli. The BCD can be used in conjunction with standard or modified Proctor tests in the laboratory to compare laboratory and field moduli values for specific specimen. The repeatability of each device was investigated, as well as attempts made to determine a correlation between the two devices"--Abstract, page iv.


Ge, Yu-Ning (Louis)

Committee Member(s)

Stephenson, Richard Wesley
Hoffman, David J.


Civil, Architectural and Environmental Engineering

Degree Name

M.S. in Civil Engineering


The financial support for this research work was by the Senator Bond Fund in Transportation Research through Missouri Transportation Institute and is gratefully acknowledged.


Missouri University of Science and Technology

Publication Date

Fall 2008

Journal article titles appearing in thesis/dissertation

  • Investigation of the thermal conductivity of compacted silts and its correlation to the elastic modulus
  • Field evaluation of BCD and LFWD for the quality assurance of pavement modulus


ix, 68 pages

Note about bibliography

Includes bibliographical references.


© 2008 Robert Dunalp Hotz II, All rights reserved.

Document Type

Thesis - Restricted Access

File Type




Subject Headings

Nondestructive testing
Soil compaction -- Testing
Thermal conductivity

Thesis Number

T 9432

Print OCLC #


Link to Catalog Record

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