U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000
Federal Highway Administration Research and Technology
Coordinating, Developing, and Delivering Highway Transportation Innovations
 |
| This report is an archived publication and may contain dated technical, contact, and link information |
|
Publication Number: FHWA-HRT-07-052 Date: September 2007 |
| T88 | Particle Size Analysis of Soils |
| T99 | The Moisture Density Relations of Soils Using a 5.5-lb (2.5-kg) Rammer and 12 Inch (305-mm) Drop |
| T100 | Specific Gravity of Soils |
| T233 | Density of Soil in Place by Block, Chunk or Core Sampling |
| T234 | Strength parameters of soils by Triaxial Compression |
| T265 | Laboratory Determination of Moisture Content of Soils |
| T292 | Resilient Modulus of Subgrade Soils and Untreated Base/Subbase Materials |
| T238 | Density of Soil and Soil-Aggregate in Place by Nuclear Methods (Shallow Depth) |
| T239 | Moisture Content of Soil and Soil-Aggregate in Place by Nuclear Methods (Shallow Depth) |
| P41 | Gradation of Unbound Granular Base and Subbase Materials |
| P42 | Hydrometer Analysis of Subgrade Soils |
| P43 | Determination of Atterberg Limits of Unbound Granular Base and Subbase Materials and Subgrade Soils |
| P44 | Moisture Density Relations of Unbound Granular Base and Subbase Materials |
| P47 | Classification and Description of Unbound Granular Base and Subbase Materials |
| P49 | Determination of Natural Moisture Content |
| P51 | Sieve Analysis of Subgrade Soils |
| P52 | Classification and Description of Subgrade Soils |
| P55 | Moisture Density Relations of Subgrade Soils |
| E380 | Standard Practice for Use of the International System of Units (SI) (The Modernized Metric System) |
5.1 Laboratory Testing Prerequisites for Unbound Granular Base/Subbase Materials
For testing unbound granular base/subbase materials, the following tests shall be performed prior to resilient modulus testing:
For the GPS testing program, in addition to this testing of unbound granular base/subbase materials, the following information shall be available from the field sampling and testing data sheets:
If the available bulk sample is insufficient in size and a sample from one test is reused for other test(s) and/or the resilient modulus, then the appropriate comment code shall be used in reporting the test results for P46.
5.2 Laboratory Testing Prerequisites for Untreated Subgrade Soils
(a) For testing subgrade materials obtained from bulk samples, the following tests shall be performed prior to resilient modulus testing:
For the GPS testing program, in addition to this testing of subgrade materials, the following information shall be available from the field sampling and testing data sheets:
If the available bulk sample is insufficient in size and a sample from one test is reused for other test(s) and/or the resilient modulus, then the appropriate comment code shall be used in reporting the test results for P46.
(b) Instructions for undisturbed thin walled tube samples of subgrade soils: If the thin walled tubes are available and acceptable for the resilient modulus test the "undisturbed" thin walled tube sample shall be used in the resilient modulus testing. The comment code 87 shall be used in reporting the test results for P46.
(c) If a thin walled tube sample is not available or acceptable for testing then use bulk samples to reconstitute the test specimen for the resilient modulus testing. The comment code 88 shall be used in reporting the test results for P46. Additional comment codes, if applicable, shall be used to identify the manner of reconstitution for the material.
Previous | Table of Contents | Back to FHWA-RD-07-052 | Next
