Doctoral Dissertations


Mengxing Li

Keywords and Phrases

Concrete Infrastructures; Impact Echo; Nondestructive Testing; Ultrasonic Surface Wave


"Concrete infrastructure of United States is aging and deteriorating. Accurate assessment the condition of concrete infrastructure is critical for its maintenance and rehabilitation. Stress-wave based methods, including ultrasonic surface wave (USW) and impact echo (IE), are becoming popular for characterizing defects and mechanical properties of concrete infrastructures. In this dissertation, a comprehensive literature review of seismic wave theory and common types of defects identified in concrete infrastructures, as well as stress-wave based methods used for concrete infrastructure monitoring and characterizing on a selected concrete bridge deck and two concrete pavement segments are present. The utility and reliability of both methods were carefully evaluated and validated based on the comparison analysis with other destructive or non-destructive testing (NDT) methods carried out in the field or laboratory for the same bridge decks and pavement segments, such as the concrete hydro-demolition, drilling, static modulus of elasticity of concrete specimens in compression and ground penetrating radar (GPR). Detailed investigation of the sensitivity and limitation of stress-wave based methods for different types of defects identified in concrete bridge decks and pavements has been performed and presented. The outcome of this study is to expand the knowledge of stress-wave based methods, to better understand their strengths and limitations, to evaluate the reliability and utility of both the USW and IE test results in characterizing and monitoring defects and mechanical properties of concrete infrastructures. The result of this study is most beneficial for transportation agencies and researchers to use stress-wave based methods properly and effectively for further feasibility studies or monitoring of concrete infrastructures"--Abstract, page iv.


Anderson, Neil L. (Neil Lennart), 1954-

Committee Member(s)

Sneed, Lesley
Maerz, Norbert H.
Rogers, J. David
Torgashov, Evgeniy V.


Geosciences and Geological and Petroleum Engineering

Degree Name

Ph. D. in Geological Engineering


Missouri. Department of Transportation
United States. Department of Transportation
Missouri University of Science and Technology. National University Transportation Center


Missouri University of Science and Technology

Publication Date

Spring 2017

Journal article titles appearing in thesis/dissertation

  • Application of ultrasonic surface wave techniques for concrete bridge deck condition assessment
  • Condition assessment of concrete pavements using both ground penetrating radar and stress-wave based techniques
  • An assessment of concrete over asphalt pavement using both the ultrasonic surface wave and impact echo techniques


xiv, 110 pages

Note about bibliography

Includes bibliographic references.


© 2017 Mengxing Li, All rights reserved.

Document Type

Dissertation - Open Access

File Type




Thesis Number

T 11100

Electronic OCLC #