Project status
Completed
Start date: 08/15/02
End date: 02/14/04
Researcher(s)
Principal investigators:
Co-principal investigators:
- Charles Jahren | 515-294-3829 | cjahren@iastate.edu
Student researcher:
- Pavana Vennapusa
About the research
In recent years, it has become apparent that the design and maintenance of pavement drainage extends the service life of pavements. Most pavement structures now incorporate subsurface layers. Part of the function of these subsurface layers is to drain away excess water, which can be extremely deleterious to the life of the pavement. To assure the effectiveness of such drainage layers after they have been spread and compacted, simple, rapid, in-situ permeability and stability testing and end-result specification are needed. This report includes conclusions and recommendations related to four main study objectives:
- Determine the optimal range for inplace stability and in-place permeability based on Iowa aggregate sources;
- Evaluate the feasibility of an air permeameter for determining the permeability of open and well-graded drainage layers in situ;
- Develop reliable end-result quality control/quality assurance specifications for stability and permeability;
- Refine aggregate placement and construction methods to optimize uniformity.
Publications
Report: Final Report: Determination of the Optimum Base Characteristics for Pavements (TR-482) (11.9 mb pdf) May 2004
Related publications:
- Pavement Drainage Estimator V1.0 (off site), Nov 2012
- TRB 2006 Paper: In-situ permeability of unbound granular bases using the air permeameter test (off site), Oct 2011
- ASTM Paper: A device for rapid determination of permeability for drainable bases (off site), Oct 2011
- Tech Transfer Summary: Optimum Pavement Base Characteristics pdf (Tech transfer summary) May 2004
Sponsor(s)/partner(s)
Sponsor(s): Iowa Highway Research Board
