Long term monitoring of moisture under pavements.

670723406Final report.PDFTech ReportFHWA/OH-2010/1134170Soil waterSoils by frost condition or potentialFrostAsphalt pavementsPavement designMonitoringMeasurementPavementsModulus of resilienceOhioOhio State University. Dept. of Civil and Environmental Engineering and Geodetic ScienceWolfe, WilliamButalia, TarunjitHowdyshell, JamesOhio State University. Dept. of Civil and Environmental Engineering and Geodetic ScienceOhio. Dept. of TransportationUnited States. Federal Highway AdministrationNTL-HIGHWAY/ROAD TRANSPORTATION-Soils and GeologyNTL-HIGHWAY/ROAD TRANSPORTATION-DesignNTL-HIGHWAY/ROAD TRANSPORTATION-Construction and MaintenanceUS Transportation CollectionMonitoring of the environmental instrumentation installed under select pavement sections constructedby the Ohio Department of Transportation (ODOT) in 1995 on US 23 in Delaware County, Ohio wascontinued. The measurements made consisted of soil moisture, temperature and frost depth profiles.OSU constructed and installed tensiometers to directly measure the porewater pressures in thesubsurface soils at seven locations at the DEL23 SHRP test road (four during original road constructionand three more in 2002). Tensiometers were also installed and monitored at seven additional locationswithin the state. Those devices were monitored throughout the duration of the current project.A laboratory testing program was conducted to identify relationships between static soil propertiesand the design resilient modulus for compacted cohesive subgrade soils. Resilient modulus as well asclassification and strength tests were performed on cohesive soil samples. The program to establish therelationships between dynamic soil behavior and static properties is described and a predictive tooldeveloped through the use of artificial neural networks is presented