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Thesis
A time domain method for accurate non-destructive determination of concrete pavement thickness
Master of Science (M.S.), Drexel University
Dec 2001
DOI:
https://doi.org/10.17918/etd-41
Abstract
The material in this thesis focuses on the problem of accurately determining the thickness of a concrete pavement layer via non-destructive means. Existing methods are reviewed, and limitations governing their use outlined. An alternative method based on isolating P-waves reflected off the pavement base in the time-domain is proposed. Potential advantages over established methods are that prior knowledge of P-wave velocity and geometrical correction factors are not required. Furthermore the method can potentially be used to obtain a value of P-wave velocity that is representative of the slab thickness. In the first section of the work the dynamic surface response of a concrete pavement is investigated using a Finite Element model. Further details of the proposed approach pertaining to signal processing are described and a simple test procedure is recommended based on the numerical results. Experimental trials were performed on a full-scale pavement, and subsequently cores were extracted in order to independently verify the obtained values of thickness and P-wave velocity. The accuracy of these results is presented, together with conclusions and recommendations for the future development of this new method.
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Details
- Title
- A time domain method for accurate non-destructive determination of concrete pavement thickness
- Creators
- Alexander Gibson - DU
- Contributors
- John Sandor Popovics (Advisor) - Drexel University (1970-)
- Awarding Institution
- Drexel University
- Degree Awarded
- Master of Science (M.S.)
- Publisher
- Drexel University; Philadelphia, Pennsylvania
- Resource Type
- Thesis
- Language
- English
- Academic Unit
- Civil (and Architectural) Engineering [Historical]; College of Engineering (1970-2026); Drexel University
- Other Identifier
- 41; 991014632602304721