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Publication Details

LTPP Protocol P46: Resilient Modulus of Unbound Granular Base/Subbase Materials and Subgrade Soils General Interest: provides practical guidance to engineers responsible for the day-to-day design, construction, rehabilitation, maintenance, and management of pavements.

Primary Topic: Materials-Unbound and Soils

Description: This LTPP program protocol describes the laboratory preparation and testing procedures for the determination of the Resilient Modulus (Mr) of unbound granular base and subbase materials and subgrade soils under specified conditions representing stress states beneath flexible and rigid pavements subjected to moving wheel loads. This protocol is based partially on the test standard AASHTO T292-91I, Resilient Modulus of Subgrade Soils and Untreated Base/Subbase Materials. The test shall be carried out in accordance with the following protocol procedure.

FHWA Publication Number:

Publication Year: 1996

Document Links: PDF (file size: 1 mb)



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Updated: 08/19/2015
Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000