原文传递
Portable FWD (Prima 100) for In-Situ Subgrade Evaluation.
| 题名： | Portable FWD (Prima 100) for In-Situ Subgrade Evaluation. |
| 作者： | george, k. p. |
| 关键词： | pavement design, loads(forces), measuring instrument, pavement conditions, soils, laboratory tests |
| 摘要： | Subgrade soil characterization measured in terms of resilient modulus, MR, has been a prerequisite for pavement design. For new pavement design, MR is obtained by conducting repeated load triaxial tests on reconstituted/undisturbed cylindrical specimens, employing AASHTO T-307 test protocol. Because of the complexities encountered with the test, in-situ tests would be desirable, if reliable correlation can be established. Subgrade characterization for rehabilitation selection, however, in-situ tests are the norm than the exception. The focus of this study is to investigate the viability of Prima 100, a Portable Falling Weight Deflectometer (PFWD), for direct testing of subgrade with the objective of estimating resilient modulus, via a correlation between MR and PFWD modulus (EPFWD). Thirteen as-built subgrade sections reflecting typical subgrade soil materials in Mississippi, were selected and tested for elastic modulus employing a Falling Weight Deflectometer (FWD), followed by PFWD. In-situ unit weight and moisture were measured using a nuclear device. Soil samples collected from those sections were subjected to repeated load triaxial test (AASHTO T307) and to other routine laboratory tests for classification purposes. / NOTE: Final rept. / Supplementary Notes: Sponsored by the Federal Highway Administration and the Mississippi Department of Transportation. / Availability Note: Also available on CD-ROM. Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA. |
| 总页数： | u0713；128p |
| 报告类型： | 科技报告 |
相关文献
- Development of Stiffness-Based Specifications for In-Situ Embankment Compaction Quality Control.
- Field Study of In Situ Subgrade Soil Response Under Flexible Pavements
- Railroad Subgrade Support and Performance Indicators. A Review of Available Laboratory and In-Situ Testing Methods.
- SINGLE-MEASUREMENT ESTIMATION OF IN SITU ASPHALT-LAYER MODULI WITH PORTABLE FALLING WEIGHT DEFLECTOMETER.
- ASSESSMENT OF FALLING WEIGHT DEFLECTOMETER DATA FOR STABILIZED FLEXIBLE PAVEMENTS.
- Using Fiber-Optic Sensor Technology to Measure Strains Under the Asphalt Layer of a Flexible Pavement Structure.
检索历史
应用推荐
