Form Approved
REPORT DOCUMENTATION PAGE
OMB No. 0704-0188
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1. AGENCY USE ONLY (Leave blank)
2. REPORT DATE
3. REPORT TYPE AND DATES COVERED
September 1996
Final Report
May 1991October 1994
4. TITLE AND SUBTITLE
5. FUNDING NUMBERS
Modeling of Mn/ROAD Test Sections with the
CPAR Project
CRREL Mechanistic Pavement Design Procedure
Agreement No. 64632
Task Order No. 1
6. AUTHORS
Susan R. Bigl and Richard L. Berg
7. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)
8. PERFORMING ORGANIZATION
REPORT NUMBER
U.S. Army Cold Regions Research and Engineering Laboratory
72 Lyme Road
Special Report 96-21
Hanover, New Hampshire 03755-1290
9. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)
10. SPONSORING/MONITORING
AGENCY REPORT NUMBER
Minnesota Department of Transportation
395 John Ireland Boulevard Mail Stop 330
MN/RC-96/22
St. Paul, Minnesota 55155
11. SUPPLEMENTARY NOTES
For conversion of SI units to non-SI units of measurement consult ASTM Standard E380-93, Standard Practice for Use of the
International System of Units, published by the American Society for Testing and Materials, 1916 Race St., Philadelphia, Pa.
19103.
12a. DISTRIBUTION/AVAILABILITY STATEMENT
12b. DISTRIBUTION CODE
Approved for public release; distribution is unlimited.
Available from NTIS, Springfield, Virginia 22161
13. ABSTRACT (Maximum 200 words)
The U.S. Army Cold Regions Research and Engineering Laboratory is developing a mechanistic pavement design procedure
for use in seasonal frost areas. The procedure was used to predict pavement performance of some test sections at the Mn/
ROAD facility. Simulations were conducted in three phases, investigating the effects on predictions of water table position,
subgrade characteristics, asphalt model, and freeze season characteristics. The procedure predicted significantly different
performance by the different test sections and highly variable results depending on the performance model applied. The
simulated performance of the tests sections also was greatly affected by the subgrade conditions, e.g., density, soil moisture,
and water table depth. In general, predictions for the full-depth asphalt sections indicate that they will not fail due to cracking,
but two of the three criteria for subgrade rutting indicate failure before the five- or 10-year design life of the sections.
Conventional sections are predicted not to fail due to subgrade rutting; however, sections including the more frost-susceptible
bases in their design are predicted to fail due to asphalt cracking relatively early in their design life, and sections with non-
frost-susceptible bases are predicted to fail towards the end of the design life.
14. SUBJECT TERMS
15. NUMBER OF PAGES
51
Freeze season characteristics
Pavement performance
16. PRICE CODE
Mechanistic Pavement Design and Evaluation Procedure
17. SECURITY CLASSIFICATION
18. SECURITY CLASSIFICATION
19. SECURITY CLASSIFICATION
20. LIMITATION OF ABSTRACT
OF REPORT
OF THIS PAGE
OF ABSTRACT
UNCLASSIFIED
UNCLASSIFIED
UNCLASSIFIED
UL
Standard Form 298 (Rev. 2-89)
NSN 7540-01-280-5500
Prescribed by ANSI Std. Z39-18
298-102
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