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https://hdl.handle.net/11681/10429| Title: | Falling-weight deflectometer study : optimizing the number of replicates and the spacing of test stations |
| Authors: | Strategic Highway Research Program (U.S.) United States. Federal Highway Administration. Freeman, Reed B. Alexander, Don R. |
| Keywords: | Falling-weight deflectometer Spatial variability Non-destructive testing Nondestructive testing NDT Test variability Pavement performance Pavements Pavement performance Pavement evaluation Pavement testing |
| Publisher: | Geotechnical and Structures Laboratory (U.S.) Engineer Research and Development Center (U.S.) |
| Series/Report no.: | ERDC/GSL TR ; 01-11. |
| Description: | Technical Report Abstract: The Strategic Highway Research Program, managed by the Federal Highway Administration, includes a pavement evaluation component as part of its Long-Term Pavement Performance study. These evaluations include the use of falling-weight deflectometer (FWD) test devices. The purpose of this project was to determine whether the FWD test procedures could be modified to reduce cost, without losing a significant amount of information. Procedural changes could include a decrease in the number of test replicates and/or an increase in the spacing between test stations. Variability between replicates was found to be relatively low; a reduction in replicate drops from four to two would not cause a substantial loss in information. An increase in spacing between tests from 7.6 m (25ft) to 30.5 m (100ft) would result in a substantial loss ofinfonnation. An increase in spacing from 7.6 m (25ft) to 15.2 m (50ft) would be reasonable if test section responses to FWD were to be summarized as expected values and dispersions. If extremes in pavement response (e.g., minimum and/or maximum stiffness) were judged to be the most important results, the spacing between tests should not be increased from 7.6 m (25ft). |
| Rights: | Approved for public release; distribution is unlimited. |
| URI: | http://hdl.handle.net/11681/10429 |
| Appears in Collections: | Technical Report |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| ERDC-GSL-TR-01-11.pdf | 17.04 MB | Adobe PDF |  View/Open |