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South Dakota Department of Transportation
Project Synopsis

Title: Evaluation of the GeoGauge Compaction Tester
Project Researcher: Mary Storsteen, SDDOT
Project Manager: Brian Hines
Research Period: -
Cost: $0.00

Problem Statement:South Dakota Department of Transportation (SDDOT) currently uses soil density as a means to ensure proper compaction during construction of a highway. Getting the required number of density test is a challenge, because of the amount of time it takes and the number of personnel available to do the required testing. SDDOT just completed a research project SD2000-02 Soil Density Target Values. The purpose of this study was to see if there was anything out there that allow our inspectors to be more efficient. The study reveled that SDDOT is doing about the same types of testing as most other states. It was during the course of this study that SDDOT became aware of the Humbolt GeoGaugeTM.

The GeoGauge measure stiffness. The GeoGauge has been reported to be easy to operate and only takes a minute to get a proper reading. If the GeoGauge could eliminate the need for a nuclear gauge, SDDOT may be able to realize some cost savings.


Research Objectives:
1  To evaluate the performance of the GeoGauge Compaction Tester in subgrade soils prevalent in South Dakota, asphalt, and MSE (Mechanical Stabilize Earth) Wall.
2  To identify relationships between measurements obtained by the GeoGauge to those obtained by conventional soil density tests and the nuclear gauge.
3  To provide results to a national pooled fund study investigating GeoGauge performance.

Research Tasks:
1  Meet with the project's technical panel to review project scope and work plan.
2  Review literature on methodology and results from other GeoGauge evaluation efforts.
3  Identify grading projects that encompass a wide range of subgrade soils prevalent in South Dakota. Identify asphalt-paving projects. Identify a MSE wall project.
4  Obtain conventional soil density values and GeoGauge measurements from subgrades constructed in the identified projects. Obtain density values and GeoGauge measurements from asphalt constructed in the identified projects. Obtain GeoGauge measuremen
5  Analyze measurements obtained from density tests and from the GeoGauge to determine relationships between the test methods.
6  Make recommendations as to where to go from here (i.e. whether further research is needed, whether to use the gauge, or whether there is any use for the gauge).
7  Prepare a final report and executive summary of the research methodology, findings, conclusions, and recommendations.
8  Make an executive presentation to the SDDOT Research Review Board at the conclusion of the project.

Documents Available:

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