At the time of the instigation of this research the recommended AASHO design formula was based on a Soil Support Value which directly correlated with the "R-Value" system developed by F. N. Haveem, whereas, the flexible pavement design method currently used in Louisiana is based upon the Texas Triaxial Method. The AASHO further recommended that those states using a different design method correlate their past experience and data with the R-Value system. Although correlations, which seemed to be satisfactory, have been obtained for Group Index and CBR methods and a tentative correlation with the Texas Triaxial Strength Classes had been suggested, it appeared that the Texas Triaxial Strength Classes might require some further adjustment. It was with this objective in mind that this research project was undertaken; however, since the later version of the AASHO Recommended Guide for the Design of Flexible Pavement structures establishes the Soil Support Value in an abstract scale, it is felt that any correlation with Soil Support Value, except for an (S) value of 3.0, as such, is beyond the scope of this report. However, a new research project being prepared for the purpose of establishing the different factors used in AASHO design formula will attempt an accurate correlation for Support Values other than 3.0.
The resilient modulus is a critical engineering property used to characterize the unbound and subgrade materials in the AASHTO Mechanistic Empirical P...
This study investigates all of the generated soils data in an attempt to use the more 'routine' laboratory tests to determine geotechnical design para...
Links with this icon indicate that you are leaving a Bureau of Transportation
Statistics (BTS)/National Transportation Library (NTL)
Web-based service.
Thank you for visiting.
You are about to access a non-government link outside of
the U.S. Department of Transportation's National
Transportation Library.
Please note: While links to Web sites outside of DOT are
offered for your convenience, when you exit DOT Web sites,
Federal privacy policy and Section 508 of the Rehabilitation
Act (accessibility requirements) no longer apply. In
addition, DOT does not attest to the accuracy, relevance,
timeliness or completeness of information provided by linked
sites. Linking to a Web site does not constitute an
endorsement by DOT of the sponsors of the site or the
products presented on the site. For more information, please
view DOT's Web site linking policy.
To get back to the page you were previously viewing, click
your Cancel button.
United States Department of Transportation
[PDF-1.41 MB]
