U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000


Skip to content U.S. Department of Transportation/Federal Highway AdministrationU.S. Department of Transportation/Federal Highway Administration

Federal Highway Administration Research and Technology
Coordinating, Developing, and Delivering Highway Transportation Innovations

About LTPP | Data Collection | Analysis | Products | Pooled Fund Studies | Operations/Analysis Feedback Reports | Publications | Projects |
Customer Survey
| Contact

 

 

LTPP Publications

 

Publication Details

Moisture Content for Unbound Materials at Seasonal Monitoring Program Sites

Primary Topic: Materials-General

Description: Moisture content plays a significant role in the performance of pavements. Variation in the amount of moisture in the subgrade can change the volume of swelling soil, which may result in detrimental deformation of the pavement structure. An increase in moisture in the subgrade and unbound base can weaken the bearing capacity of these materials, affecting the pavement's response to loads and, ultimately, pavement service life.

The moisture content of unbound materials at LTPP Seasonal Monitoring Program (SMP) sites is computed based on the dielectric constant determined through the use of time-domain reflectometry and soil property data contained in the LTPP Information Management System (IMS) database. A discussion of the use of time-domain reflectometer (TDR) probes and the values derived from them can be found in the computed parameters document, "An Input for Moisture Calculations—Dielectric Constant From Apparent Length" (Publication No. FHWA-RD-99-201), which can also be found on this web site.

FHWA Publication Number: FHWA-RD-00-077

Publication Year: 2000

Document Links: PDF (file size: 0.1 mb)

PDF files can be viewed with the Acrobat® Reader®

 

 

Office of Infrastructure R&D Links

» Office of Infrastructure R&D
» Infrastructure R&D Program
»Long-Term Bridge
  Performance Program

»Long-Term Pavement
  Performance Program
» Infrastructure R&D Experts
» Infrastructure R&D Laboratories
» Infrastructure R&D Projects
» Infrastructure R&D Publications
» Infrastructure R&D Topics

 

LTPP Email Distribution List

» Contact LTPP Customer Support Service Center at ltppinfo@dot.gov if you would like to be added to our email distribution list for LTPP Newsletters and other announcements.

 

FHWA Pavement Links

» Design
» Construction
» Preservation
» Maintenance
» Management
» Rehabilitation

 

More Information

 

Contacts

» Aramis Lopez
202-493-3145
E-mail Aramis
 
» Customer Service 202-493-3035
E-mail:LTPPinfo@dot.gov
 
Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000
Turner-Fairbank Highway Research Center | 6300 Georgetown Pike | McLean, VA | 22101