Structural Evaluation of Asphalt Pavements with Full-Depth Reclaimed Base

Tang, Shuling
Cao, Yuejian
Labuz, Joseph F.
2012-12
Thumbnail Image

View/Download File

MnDOT2012-36.pdf (1.34 MB)

Persistent link to this item

https://hdl.handle.net/11299/146946
Statistics
View Statistics

Journal Title

Journal ISSN

Volume Title

Title

Structural Evaluation of Asphalt Pavements with Full-Depth Reclaimed Base

Authors

Published Date

2012-12

Publisher

Minnesota Department of Transportation

Type

Report

Abstract

Currently, MnDOT pavement design recommends granular equivalency, GE = 1.0 for non-stabilized full-depth reclamation (FDR) material, which is equivalent to class 5 material. For stabilized full-depth reclamation (SFDR), there was no guideline for GE at the time this project was initiated (2009). Some local engineers believe that GE of FDR material should be greater than 1.0 (Class 5), especially for SFDR. In addition, very little information is available on seasonal effects on FDR base, especially on SFDR base. Because it is known from laboratory studies that SFDR contains less moisture and has higher stiffness (modulus) than aggregate base, it is assumed that SFDR should be less susceptible to springtime thawing. Falling Weight Deflectometer (FWD) tests were performed on seven selected test sections on county roads in Minnesota over a period of three years. During spring thaw of each year, FWD testing was conducted daily during the first week of thawing in an attempt to capture spring thaw weakening of the aggregate base. After the spring thaw period, FWD testing was conducted monthly to study base recovery and stiffness changes through the seasons. GE of SFDR was estimated using a method established by MnDOT using FWD deflections, and the GE of SFDR is about 1.5. The value varies from project to project as construction and material varies from project to project. All the materials tested showed seasonal effects on stiffness. In general, the stiffness is weaker in spring than that in summer and fall.

Keywords

Description

Related to

Replaces

License

Collections

Research Reports

Series/Report Number

MnDOT
 2012-36

Funding information

Department of Civil Engineering, University of Minnesota; Minnesota Department of Transportation

Isbn identifier

Doi identifier

Previously Published Citation

Suggested citation

Tang, Shuling; Cao, Yuejian; Labuz, Joseph F.. (2012). Structural Evaluation of Asphalt Pavements with Full-Depth Reclaimed Base. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/146946.

Content distributed via the University Digital Conservancy may be subject to additional license and use restrictions applied by the depositor. By using these files, users agree to the Terms of Use. Materials in the UDC may contain content that is disturbing and/or harmful. For more information, please see our statement on harmful content in digital repositories.