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Publication Number: FHWA-HRT-07-052
Date: September 2007

Long Term Pavement Performance Project Laboratory Materials Testing and Handling Guide

Protocol P46
Test Method for Resilient Modulusof Unbound Granular Base/Subbase Materials and Subgrade Soils (UG07, SS07)

10. REPORT (cont.)

10.4 Comments

Comments on Laboratory Data Form T46A (recompacted specimens) or Form T46B (thin-walled tube specimens) shall include LTPP standard comment code(s), as shown in Section 4.3 of this Guide and any other note as needed. Additional codes associated with resilient modulus testing are:

Codes Comment
80 Due to insufficient size of the bulk sample, the test sample was used for the last test (Protocol P46, if the sample was reconstituted was saved and stored for possible future use by the LTPP program.
81 A seperate test sample was used for classification and description tests (Protocols P46 or P52)
82 Due to the insufficient size of the bulk sample, the test sample for the gradation test (Protocol P41 or P51) was also used to complete the classification and description tests. (Protocol P47 or P52)
83 Due to the insufficient size of the bulk sample, the test sample for the moisture-density test (Protocol P44 or P55) was saved after the test and reused for the resilient modulus testing (Protocol P46).
85 Due to the insufficient size of the bulk sample, only dry sieving was used for the gradation test (Protocol P41 or P51). The test sample after the gradation test was saved and reused to reconstitute the test sample of the resilient modulus testing (Protocol P46).
86 Due to the insufficient size of the bulk sample, only dry sieving was used for the gradation test (Protocol P41 or P51). The test sample was reused for other designated tests and the remnant of the sample was saved and stored for possible future use by the LTPP program.
87 The "undisturbed" thin-wall tube sample was used for the resilient modulus testing (Protocol P46).
88 The thin-wall tube sample was not suitable, therefore a reconstituted sample from the bulk samples was used for the resilient modulus testing.
89 The thin-wall tube sample was not available. The test sample for the resilient modulus testing (Protocol P46) was reconstituted from the bulk sample.
90 An excess portion of the thin-wall tube sample was saved and stored for possible future use by the LTPP program.
94 The test was not performed because of the oversize aggregate; sample was stored until further instruction from the FHWA-LTPP division.

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The Federal Highway Administration (FHWA) is a part of the U.S. Department of Transportation and is headquartered in Washington, D.C., with field offices across the United States. is a major agency of the U.S. Department of Transportation (DOT).
The Federal Highway Administration (FHWA) is a part of the U.S. Department of Transportation and is headquartered in Washington, D.C., with field offices across the United States. is a major agency of the U.S. Department of Transportation (DOT). Provide leadership and technology for the delivery of long life pavements that meet our customers needs and are safe, cost effective, and can be effectively maintained. Federal Highway Administration's (FHWA) R&T Web site portal, which provides access to or information about the Agency’s R&T program, projects, partnerships, publications, and results.
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