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 July 2017 MAP Brief, Developing a Quality Assurance Program (QAP) for Implementing Performance Engineered Mixtures for Concrete Pavements describes a system for implementing Performance Engineered Mixes along with new test methods to better evaluate the overall quality and expected performance of the concrete pavement. For the JULY 2017 MAP Brief, please click on image to left or go to: http://www.cproadmap.org/publications/MAPbriefJuly2017.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 entire articles in the following news from the road, please click on “click here” below each one, or go to: http://www.cproadmap.org/publications/e-news_July2017.cfm:
Colorado Evaluates Pervious Concrete for Stormwater Management: Pervious concrete pavement (PCP) is gaining use as a stormwater Best Management Practice (BMP) for its ability to reduce pervious area, reduce direct runoff from developed sites, provide groundwater recharge, and filter out contaminants. The primary focus of this research was to evaluate the performance of a PCP which will be subjected to the freeze/thaw conditions in Colorado. To read more on this Colorado PCP news, please click here.
Washington State DOT Evaluates Performance of Performance-Based Mixes: The 2014 Washington State DOT (WSDOT) Standard Specifications revised the requirements for contractor mix designs for bridge decks to remove some of the more prescriptive requirements and replace them with performance-based requirements. The intent was to focus on the overall performance of the concrete rather than providing a recipe.
The previous specifications provided minimum requirements for cementitious content and required the use of fly ash. To read more on this WSDOT news, please click here.
Continuous Deflection Device to Select Rehabilitation Strategies for Concrete Pavement: The Texas DOT (TxDOT) has been actively developing and implementing non-destructive testing for several decades. Two devices that have been widely used include the Rolling Dynamic Deflectometer (RDD) and Ground Penetrating Radar (GPR). The RDD utilizes both static and dynamic loading to measure pavement surface deflections. GPR has been used by TxDOT for measuring pavement layer thickness and for identifying defects within the pavement layers. Based upon the success of these two independent platforms, the TxDOT initiated a study to combine the two technologies into a single combined unit called the Total Pavement Acceptance Device (TPAD). To read more on this TxDOT news, please click here.
High-Performance Environmentally Friendly Concrete: Can a concrete mixture be designed to improve performance while at the same time being more environmentally friendly and less costly? This was the goal of the Missouri DOT (MoDOT) in the development of two new high-performance concrete (HPC) mixtures for pavements (Eco-Pave-Crete) and bridge infrastructure (Eco-Bridge-Crete).
The design of these mixes began by limiting the binder content to 540 lb/yd3 and 590 lb/yd3, respectively, to reduce paste content and subsequently cost, CO2 emissions, and shrinkage. To read the entire MoDOT news article, please click here.
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