INSIDE THE DOT
South Dakota Department of Transportation
Asphalt Surface Treatment Performance Follow-up
The South Dakota Department of Transportation conducted a research project in 1991 (SD91-03, Asphalt Surface Treatment Performance) to investigate the performance of asphalt surface treatments (chip seals). Upon completion of the project, it was clear that some questions remained unanswered because the evaluated surface treatment projects were not old enough (1-2 years old) and because limestone aggregate projects were not adequately investigated. The intent of this research project is to complete a longer-term evaluation of the projects studied in the original 1991 study and to provide additional evaluation of limestone projects and new asphalt surface treatment procedures on a project in the Black Hills area.
1 To determine the long-term performance of asphalt surface treatments in South Dakota.
2 To evaluate new procedures for improving the life and performance of asphalt surface treatments.
1 Meet with the project's technical panel to review project scope and work plan.
2 Perform follow-up evaluations of the test sections from the previous study.
3 Select and evaluate additional existing limestone asphalt surface treatments (ages 1-5 years).
4 Construct test sections utilizing various combinations of unmodified and polymer modified emulsified asphalts, quarried limestone, and natural aggregate.
5 Prepare an interim report after construction to include construction evaluation and early performance of the control and test sections.
6 Monitor the test sections for two (2) years.
7 Evaluate the potential costs if SDDOT were to adopt the use of the new procedures.
8 Prepare a final report and executive summary of the literature review, research methodology, findings, conclusions, and recommendations.
9 Make an executive presentation to the SDDOT Research Review Board at the conclusion of the project.
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