Projects and Grants per year
Grants and Contracts Details
Description
OBJECTIVES: The major objective of this study is to examine the effectiveness of new impact
compactors for breaking down and compacting mixtures of hard rocks and soft shales. The value
of using this type of equipment for compacting highway subgrades will be examined. A draft
specification and construction methods will be provided for possible use on demonstration
projects. In the future, the study may examine the effectiveness of the new equipment for
compacting other embankment materials, such as durable and non-durable shales and different
types of soils.
BACKGROUND: Achieving good compaction of embankment mixtures containing soft clayey
shales and hard slabs of limestone, such as interbedded layers of materials ITom the Kope
Geological Formation, is a major problem in many areas of Kentucky. Failure of conventional
equipment to achieve good compaction of mixtures of soft and hard materials has led to
numerous landslides and settlement failures, which has cost millions of dollars in repairs. This
new, innovative compaction technology has the potential to vastly improve the engineering
behavior of compacted materials and can lead to large savings to the Cabinet in constructing new
roadways, as well as reconstructing old highways. Techniques and experience needs to be
developed so that this technology can be evaluated and implemented. Reduced water content
requirements and increased lift thickness may lead to large savings to contractors and the Cabinet.
Large increases in the strengths of materials would decrease settlements and prevent, or
minimize, instability problems. The dynamic compactors appear suitable for breaking down and
compacting clayey shales.
FY 2007 PROPOSED WORK: It is anticipated that the basic research methods would be
determined and pad testing initiated during the 2007 fiscal year. Full field testing and
demonstration will take place in succeeding years.
PROGRAMMED COST FY 2007:
TOTAL ESTIMATED COST:
$50,000
$50,000
Note: The required full field testing/demonstration would be funded ITom other sources.
Status | Finished |
---|---|
Effective start/end date | 7/1/06 → 6/30/07 |
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Projects
- 1 Finished
-
Kentucky Cooperative Transportation Research Program Part II KCTRP 07-27
Toussaint, P., Allen, D., Chen, M., Crabtree, J., Graves, R., Grossardt, T., Hancher, D., Harik, I., Hopkins, T., Hopwood, T., Kreis, S. & Pigman, J.
7/1/06 → 6/30/07
Project: Research project