Improving the Foundation Layers for Concrete Pavements: Pavement Foundation Layer Reconstruction – Iowa US 30 Field Study - TPF-5(183)

(2016) Improving the Foundation Layers for Concrete Pavements: Pavement Foundation Layer Reconstruction – Iowa US 30 Field Study - TPF-5(183). Transportation, Department of

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Abstract

This technical project report is one of the field project reports developed as part of the TPF-5(183) and FHWA DTFH 61-06-H00011:WO18 studies. This report presents results and analysis of field and laboratory tests from a field study conducted on a US 30 reconstruction project in Boone County, Iowa. The project involved removal of the existing pavement, which showed severe pavement distresses; reconstruction of the pavement foundation layers (base, subbase, and subgrade); and placement of a new jointed plain cement pavement (JPCC). Field testing was conducted by the Iowa State University (ISU) research team on the existing pavement prior to reconstruction work, on the new foundation layers, and on the newly constructed pavement. A detailed laboratory testing plan was executed on bulk samples of RPCC, RPCC/RAP, and subgrade layers. In situ LWD and DCP tests were conducted on the newly constructed foundation layers, and FWD tests were conducted after the pavement was placed. Temperature monitoring was conducted. Results are detailed in the report