Rapid Alternative for Laboratory Determination of Resilient Modulus Input Values on Stabilized Materials for the AASHTO Mechanistic-Empirical Design Guide

NCHRP is in the final stages of developing and implementing a new mechanistic–empirical pavement design guide (MEPDG) to be used by all state highway agencies for layer thickness design. Once adopted, it will become the national procedure required on all federally aided projects. A key material property to be used in the design will be the resilient modulus value, which either can be obtained from laboratory testing or can be backcalculated from deflection data collected with falling weight deflectometers. It is important that realistic design moduli values be used. The standard test method for resilient modulus of subgrade soils and untreated base and subbase materials is AASHTO T307-99. However, the setup for this procedure is both difficult and time-consuming, and the equipment required to run this test is expensive. With the low strain levels used, it is likely that accurate instrumentation will be problematic for most state departments of transportation. The free–free resonant column test is a simple, nondestructive laboratory test method for determining the seismic modulus of pavement materials; it takes approximately 5 min to setup and complete. The equipment costs less than $4,000. For the tests conducted, it appears that the seismic modulus device is a better and more repeatable test for estimating the resilient modulus of stabilized materials, and it shows great potential for acquiring reasonable resilient modulus input values for the new AASHTO MEPDG.

• Record URL:
  • https://doi.org/10.3141/2026-08
• 
• Summary URL:
  • http://scholar.google.com/scholar_lookup?title=Rapid+Alternative+for+Laboratory+Determination+of+Resilient+Modulus+Input+Values+on+Stabilized+Materials+for+the+AASHTO+Mechanistic-Empirical+Design+Guide&author=S.+Hilbrich&author=T.+Scullion&publication_year=2007
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780309104531
• Authors:
  • Hilbrich, Stacy L
  • Scullion, Tom
• Publication Date: 2007

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Photos; References; Tables;
• Pagination: pp 63-69
• Monograph Title: Geomaterials 2007
• Serial:
  • Transportation Research Record: Journal of the Transportation Research Board
  • Issue Number: 2026
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Base course (Pavements); Cost effectiveness; Laboratory tests; Modulus of resilience; Nondestructive tests; Pavement design; State departments of transportation; Subbase (Pavements); Subgrade (Pavements); Test procedures
• Identifier Terms: Mechanistic-Empirical Pavement Design Guide
• Uncontrolled Terms: Resonant column testing
• Subject Areas: Design; Geotechnology; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I42: Soil Mechanics;

Filing Info

• Accession Number: 01046090
• Record Type: Publication
• ISBN: 9780309104531
• Files: TRIS, TRB
• Created Date: Apr 18 2007 7:17AM