Pavement Subgrade Performance Study: Project Overview

Mechanistic design or evaluation of pavements requires fundamental material properties and material failure criteria as a function of load and environmental effects such as temperature and moisture content. The strength or weakness of a pavement structure is based on the performance of the subgrade....

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Bibliographic Details
Main Authors: Janoo, Vincent, Irwin, Lynne, Haehnel, Robert
Other Authors: ENGINEER RESEARCH AND DEVELOPMENT CENTER HANOVER NH COLD REGIONS RESEARCH AND ENGINEERING LAB
Format: Text
Language:English
Published: 2003
Subjects:
Civil Engineering
*PAVEMENTS
STRESS STRAIN RELATIONS
LOADS(FORCES)
FAILURE
MOISTURE CONTENT
ENVIRONMENTAL IMPACT
TEMPERATURE SENSITIVE ELEMENTS
ACCELERATED TESTING
*SUBGRADE
PAVEMENT DESIGN
MECHANISTIC DESIGN
Cold Regions Research and Engineering Laboratory
Online Access:http://www.dtic.mil/docs/citations/ADA415860
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA415860
Description
Summary:Mechanistic design or evaluation of pavements requires fundamental material properties and material failure criteria as a function of load and environmental effects such as temperature and moisture content. The strength or weakness of a pavement structure is based on the performance of the subgrade. The current subgrade failure criteria used in many mechanistic design/evaluation methodologies were surmised mainly from tests that did not consider the effects of subgrade soil type or moisture content. Because of these limitations the current FHWA-sponsored Subgrade Performance Study was designed to investigate and upgrade the failure criteria of subgrade materials. The project plans to study the effect of subgrade type and moisture content on the failure criteria. This international study includes testing at the U.S. Army Cold Regions Research and Engineering Laboratory where test sections are being constructed using four subgrade types and three moisture contents and subjected to accelerated loading. The sections are instrumented with stress strain moisture and temperature sensors. In this study the ambient temperature is held at around 20 deg C. This report provides an overview of the test program and testing procedure. Subsequent reports will detail the construction of each test section the data acquired and the results. Prepared in collaboration with Cornell Univ., Local Roads Program, Ithaca, NY. The original document contains color images. All DTIC reproductions will be in black and white.

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