The National Concrete Consortium (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.
Moving Advancements into Practice (MAP) Brief describes promising research and technologies that can be used now to enhance concrete paving practices. The December 2017 MAP brief, “Performance Assessment of Nonwoven Geotextile Materials Used as Separation Layer for Unbonded Concrete Overlay of Existing Concrete Pavement Applications in the U.S.” provides an overview of the national performance experience of nonwoven geotextile separation layers as an alternative to hot-mix asphalt separation layers in unbonded concrete overlay applications. For a PDF of the DECEMBER 2017 MAP Brief, please click on image to the left, or go to: http://www.cproadmap.org/publications/MAPbriefDec2017.pdf.
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. To read the December E-News, click on the link following each article highlighted below, on the image to the right, or go to: http://www.cproadmap.org/publications/e-news_Dec2017.cfm#MAP.
Assessment of Limestone Blended Cements for Transportation Applications
Research at the Georgia Institute of Technology compared the use of Type IL limestone-blended cement to conventional Type I/II portland cement. Type IL and I/II cement, in varying degrees of fineness, were provided by five cement producers. The results of the investigation found that differences in mechanical properties of concretes made with each cement type were … To READ the rest of this article, please go to: http://www.cproadmap.org/publications/e-news_Dec2017.cfm#MAP
Guide Specification for Internally Curing Concrete
The National Concrete Pavement Technology Center completed a new guide specification for internally curing (IC) concrete. The concept of IC involves the replacement of a portion of the fine aggregate with pre-wetted lightweight fine aggregate (LWA). The wetted LWA supplies curing water from within the concrete, which provides a more uniform rate of hydration, thereby reducing shrinkage cracking.
This document includes a technical brief that explains the concepts behind IC, tools for use in mixture proportioning and QC, and discusses potential concrete pavement applications; however, … To READ the rest of this article, please go to: http://www.cproadmap.org/publications/e-news_Dec2017.cfm#MAP
Concrete Repair Best Practices
The Missouri DOT performed a series of case studies to evaluate six concrete pavement restoration (CPR) methods. The project studied a variety of projects from states throughout the country. Interviews with contractors and agency representatives were completed to obtain a unique viewpoint on the techniques. The report summarizes CPR techniques for cross stitching, dowel bar retrofit, diamond grinding, full-depth repair, partial-depth repair, and slab stabilization.
A technical brief was developed for each method. The briefs includes a description of the … To READ the rest of this article, please go to: http://www.cproadmap.org/publications/e-news_Dec2017.cfm#MAP
Thin Whitetopping Selection Procedure
The Minnesota Department of Transportation (MnDOT) has developed a step-by-step selection procedure for evaluating whether an existing HMA pavement is a candidate for a bonded concrete overlay of asphalt (BCOA), also known as whitetopping.
The six-step evaluation begins with a desk review to gather information about the project including … To READ the rest of this article, please go to: http://www.cproadmap.org/publications/e-news_Dec2017.cfm#MAP
To learn more about the CP Road Map or learn how you can get involved, please contact:
Steve Klocke, Snyder & Associates Program Manager:
E-mail: sklocke@snyder-associates.com
Dale Harrington, Snyder & Associates Program Manager:
E-mail: dharrington@snyder-associates.com
Sabrina-Shields Cook, Editor:
E-mail: shieldsc@iastate.edu
Marcia Brink, Managing Editor:
E-mail: mbrink@iastate.edu
Phone: 515.964.2020