|
iDEA: Drexel E-repository and Archives >
Drexel Theses and Dissertations >
Drexel Theses and Dissertations >
Time domain method for accurate non-destructive determination of concrete pavement thickness (A)
Please use this identifier to cite or link to this item:
http://hdl.handle.net/1860/41
|
| Title: | Time domain method for accurate non-destructive determination of concrete pavement thickness (A) |
| Authors: | Gibson, Alexander |
| Keywords: | Thickness measurement
Concrete -- Measurement
Civil and Architectural Engineering |
| Issue Date: | 7-Nov-2002 |
| Publisher: | Drexel University |
| 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. |
| URI: | http://dspace.library.drexel.edu/handle/1860/41 |
| Appears in Collections: | Drexel Theses and Dissertations
|
Items in iDEA are protected by copyright, with all rights reserved, unless otherwise indicated.
|
www.drexel.edu
