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South Dakota Department of Transportation
Project Synopsis
SD2002-13


Title: Evaluation of Asphalt Concrete Crack Leveling on US12
Project Researcher: Lucas Hoover,
Project Manager: Mark Mayer
Research Period: 6/1/2002 -
Status: Approved
Cost: $10,000.00

Problem Statement: Transverse cracking in asphalt is almost unavoidable due to South Dakota's ever changing climate. Bitterly cold winters lead to thermal cracking through the contraction of the asphalt concrete. Moisture is another major enemy of asphalt concrete that causes further deterioration of the adjacent area near the crack. SDDOT has an aggressive crack routing and sealing program to help minimize the moisture ingress but sometimes these cracks may undergo significant subsidence in the asphalt concrete pavement adjacent to the cracks even with the sealing. The depressions that form result in an unacceptably rough ride die to dips at each crack.

To potentially solve this problem on US12 near Selby, SD, four test sections using three different materials and two different processes will be constructed. Deery Level and Go, Deery Recessed Repair, and Crafco PloyPatch will be used to fill and level the depressions. The products will be tested in milled and non-milled sections, which will provide ample opportunity for testing and evaluating of their effectiveness. The Deery and Crafco products are similar forms of hot pour mastic material containing aggregate. This research will evaluate the products and will help to determine whether either product will be successful .



Findings:

Research Objectives:
1  To evaluate the effectiveness of joint leveling mastic materials as a maintenance practice.
2  To determine the degree of ride quality improvement from the joint leveling applications.
3  To determine the economical benefit of joint leveling as a maintenance practice.

Research Tasks:
1  Review and summarize literature pertinent to the design and construction of the joint leveling.
2  Conduct and lay out test sections along the affected sections of US12.
3  Obtain profilometer data from each test section, as well as untreated control sections before the crack leveling construction process.
4  Meet with the technical panel to review project scope and discuss work plan.
5  Monitor and evaluate the construction of the joint leveling on US Highway 12 and document results obtained during construction and peri0odically thereafter.
6  Conduct performance tests on samples of the Deery and Crafco products.
7  Compare the economical benefit of joint leveling to other forms of highway maintenance.
8  Make a presentation to the Research Review Board at the conclusion of the summer 2002. The presentation will include a report summarizing methodology, findings in performance, cost comparisons, conclusions, and recommendations.
9  Conduct an additional survey and profilometer testing in the spring of 2003 to determine any changes in performance approximately one year after installation.
10  Make an executive presentation which includes a final report summarizing methodology, findings in performance, cost comparisons, conclusions and recommendations.

Documents Available:

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