In association with the CP Road Map Program
The National Concrete Consortium E-News (NCC E-News) is the newsletter of the Long-Term Plan for Concrete Pavement Research and Technology (CP Road Map), a national research plan developed and jointly implemented by the concrete pavement stakeholder community. For the March 2019 E-News, please click on image to the right, click on the link under each article description below, or go to: http://www.cproadmap.org/publications/e-news_Mar2019.cfm
Moving Advancements into Practice (MAP) Brief: Moving Advancements into Practice (MAP) briefs describe promising research and technologies that can be used now to enhance concrete paving practices. The March 2019 MAP Brief, “Fiber-Reinforced Concrete (FRC) for Pavement Overlays”, summarizes the value of using FRC for concrete overlays and provides methods for determining the appropriate fiber-reinforcement performance values to be specified for a project. The MAP brief also includes a summary of a spreadsheet tool—the Residual Strength Estimator—that provides an estimate of the FRC performance values to specify for a project as well as the effective flexural strength to input into mechanistic-empirical concrete pavement design software. For the PDF of the 8-page March MAP Brief, please click on image above left, or go to: http://www.cproadmap.org/publications/MAPbriefMarch2019.pdf
Latest CP Tech Center Publication:
“Technology Transfer of Concrete Pavement Technologies”: This document is a summary of the accomplishments of the Cooperative Agreement between the Federal Highway Administration (FHWA) and the National Concrete Pavement Technology Center (CP Tech Center) over the last five years. The goal of this project was to help bring the latest concrete pavement innovations, knowledge, and technologies to state highway agencies (SHAs) in support of the Accelerated Implementation and Deployment of Pavement Technologies (AID-PT) program goals. The purpose of the AID-PT program is to … To read this article and to download the report, please go to: http://www.cproadmap.org/publications/e-news_Mar2019.cfm
For the January 2019 ISCP article on this publication titled “CP Tech Center Transfer Project Wraps Up—2 Summary Documents Now Available”, please go to: https://www.concretepavements.org/2019/01/19/cp-tech-center-transfer-project-wraps-up-2-summary-documents-now-available/
NEWS FROM THE ROAD highlights research around the country that is helping the concrete pavement community meet the research objectives outlined in the CP Road Map. The research projects and the summaries described herein are the products of the researchers and sponsors.
Aggregate Quality Requirements for Pavements: Constructing and maintaining pavements requires an abundant and dependable supply of quality aggregates. Aggregate comes from a wide range of materials, including quarried rock, sand, and gravel, and materials such as slag, reclaimed asphalt pavement, and recycled concrete aggregate. While all transportation agencies have specifications for aggregate quality, there is wide variation in what different agencies consider suitable aggregates for specific applications.
This synthesis titled “Aggregate Quality Requirements for Pavements (report date: July 2018)”, documents transportation agency requirements for the quality of aggregates for various pavement types. Information used in this study was gathered through a literature review and a survey of state departments of transportation and Canadian provincial transportation agencies… To read this article, please go to: http://www.cproadmap.org/publications/e-news_Mar2019.cfm
For the full document in PDF form, please click on image to the right, or go to: http://www.trb.org/Main/Blurbs/177913.aspx
Precast Concrete Panels for Rapid Full-Depth Repair of CRC Pavement to Maintain Continuity of Longitudinal Reinforcement (date: July 2018): This tech brief written by the FWHA with support from the Illinois Tollway describes a recently implemented method for rapid overnight full-depth repairs of continuously reinforced concrete (CRC) pavements using precast concrete panels. This method, developed by the Illinois Tollway, uses continuous longitudinal reinforcement throughout the repair area to make the method applicable for repairing multiple lanes or large areas, as well as for isolated repairs for long-term performance with minimal impact to traffic… To read this article and download the document, please go to: http://www.cproadmap.org/publications/e-news_Mar2019.cfm
Comparison of Performances of Structural Fibers and Development of a Specification for Using Them in Thin Concrete Overlays (report date: August 2018): Structural fibers improve the long-term performance of concrete pavements and overlays and are potentially useful to reduce the slab thickness. These fibers are available in different parent material compositions, stiffness, shapes, and aspect ratios. The main objective of this study was to characterize the post-crack flexural and joint performance of fiber-reinforced concrete (FRC) to develop a specification for the selection of structural fibers for concrete overlays and/or pavements… To read this article and download the full document, please go to: http://www.cproadmap.org/publications/e-news_Mar2019.cfm
Evaluation of Dowel Bar Alignment and Effect on Long-Term Performance of Jointed Pavement (report date: May 2018): A study by the Louisiana Dowel bars are the current preferred method for providing load transfer for jointed plain concrete pavements (JPCP). For proper load transfer to occur, the dowels must be placed properly (i.e., in the middle of the slab, horizontal to the grade, and in the direction of traffic flow). This project evaluated JPCP performance with relation to dowel bar alignment utilizing the new MIT-SCAN2-BT technology. Four to eight jointed concrete pavements of each of the following ages were measured… To read this article and download the full document, please go to: http://www.cproadmap.org/publications/e-news_Mar2019.cfm
Evaluation of Dowel Bar Alignment and Effect on Long-Term Performance of Jointed Pavement (report date: May 2018): Dowel bars are the current preferred method for providing load transfer for jointed plain concrete pavements (JPCP). For proper load transfer to occur, the dowels must be placed properly (i.e., in the middle of the slab, horizontal to the grade, and in the direction of traffic flow). This project evaluated JPCP performance with relation to dowel bar alignment utilizing the new MIT-SCAN2-BT technology. Four to eight jointed concrete pavements of each of the following ages were measured: 0-10 years, 10-20, years, and 20+ years of age to determine the effects of dowel bar misalignment on pavement performance indicators such as … To read this article and download the full document, please go to: http://www.cproadmap.org/publications/e-news_Mar2019.cfm
Improving the Long-Term Performance of Concrete Bridge Decks Using Deck and Crack Sealers (report date: June 2018): Maintaining bridge decks is a challenge for state DOTs. It is critical to extend the life of a bridge deck as long as possible since bridge deck replacement is difficult, expensive, and significantly disrupts the traveling public. NDOT currently utilizes overlays, but effective use of sealants and deck treatments could delay overlays, save costs, and extend bridge deck life. The primary objective of the project was to … To read this article and download the full document, please go to: http://www.cproadmap.org/publications/e-news_Mar2019.cfm
If you’d like to find out more about the CP Road Map or learn how you can get involved, contact:
Dale Harrington, HCE Services
E-mail: dharrington@hceservices.com | P: 515-964-2020
Sabrina Shields-Cook, Editor | E-mail: shieldsc@iastate.edu