The National Academies

NCHRP 20-51(2) [Completed]

LTPP Product Development: PCC Pavement Practice Manual and Workshop

  Project Data
Funds: $100,000
Research Agency: Transferred to FHWA
Effective Date: 1/1/1900
Completion Date: 1/1/1900

The LTPP includes nearly 300 portland cement concrete (PCC) general and specific pavement study sections. Several LTPP reports have studied the key characteristics that affect PCC pavement performance. In addition to LTPP, states have experimented with increased thickness, permeable bases, various dowel bar configurations, joint cutting and sealing, and surface texturing changes. To date, no single study has collected this diverse information and formatted it in a way to help the states make educated and integrated decisions. The FHWA has sponsored major studies on PCC pavement performance over the last 20 years. However, no study has been done that relates LTPP findings to these other findings. Also, the models from these studies are being used in performance-related specifications and in various NCHRP reports and need to be readily available to the users.

This project will synthesize the LTPP findings in PCC practices, relate these findings to other creditable performance research, organize the information into manuals or guides, and present the information in a workshop format. Upon completing this workshop, the participants should clearly understand the LTPP research findings, be able to check them against current practice, and be in a position to influence decision-makers at the state and local levels.

States are looking for ways to improve PCC performance but need clear guidance and a structured approach to the solutions. The project will yield practical guidelines, procedures, and workshop materials that will help achieve this goal.

Status: The panel decided to have this work be addressed as part of NHI Course 13160, "Concrete Pavement Design Detail and Construction Practice." FHWA will be responsible for this work; funds were transferred to FHWA.

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