Click to go to 11-page WINTER 2021-2022 MAP BRIEF (PDF)
The NC² “Moving Advancements into Practice (MAP) Brief WINTER 2021-2022″ from the NC² Resource Library: “Optimizing Concrete Pavement Opening to Traffic”: Early-opening-to-traffic (EOT) concretes have been found to sometimes exhibit early cracking and durability problems in spite of many agencies’ EOT specifications requiring a minimum time period and/or strength before opening to traffic.
This MAP Brief surveys several EOT case studies with its conclusions include: while minimum time/strength requirements are intended to be conservative, what agencies should instead specify are reduced opening strength with more durable mixtures? For the full 11-page WINTER 2021-2022 MAP BRIEF (PDF), please click on the image above, or go to: https://intrans.iastate.edu/app/uploads/2022/01/MAPbriefWinter2021.pdf
News from the Road
Highlights recently completed research around the country that helps the concrete pavement community meet the research priorities outlined by the NC² member states.
High-Volume Fly Ash Concrete for Pavements Findings: Volume 1
High-volume fly ash concrete (HVFAC) has improved durability and sustainability properties at a lower cost than conventional concrete, but its early-age properties like strength gain, setting time, and air entrainment can present challenges for application to concrete pavements. This report provides guidelines for:
HVFAC mix design
Testing protocols
New tools for better quality control of HVFAC properties in pavement applications… READ MORE
To read this REPORT, VOLUME 1, please click on image above, or go to: https://apps.ict.illinois.edu/projects/getfile.asp?id=9843
Early-Age Properties of High-Volume Fly Ash Concrete Mixes for Pavements: Volume 2
High-volume fly ash concrete (HVFAC) is more cost-efficient, sustainable, and durable than conventional concrete. This report presents a state-of-the-art review of HVFAC properties and different fly ash characterization methods. The main challenges identified for HVFAC for pavements are its early-age properties such as air entrainment, setting time, and strength gain, which are the focus… READ MORE
To read this REPORT, VOLUME 2, please click on the image above, or go to: https://apps.ict.illinois.edu/projects/getfile.asp?id=9845
Concrete Pavement Mixtures with High Supplementary Cementitious Materials Content: Volume 3
Fly ash has been used successfully in concrete as a partial portland cement replacement, but its performance has been difficult to predict, especially at high fly ash replacement rates. In this study, the performance of 19 different concrete mixtures containing 20% or 40% Class C or Class F fly ash was compared to that of conventional concrete in terms of slump, unit weight, compressive strength, isothermal calorimetry, and surface electrical resistivity. The fly ash mixtures’ performance was then compared in terms of fly ash particle distribution and chemical makeup… READ MORE
To read this REPORT, VOLUME 3, please click on image above, or go to: https://apps.ict.illinois.edu/projects/getfile.asp?id=9847
Roadmap to Carbon Neutrality: “A More Sustainable World is Shaped by Concrete”
America’s cement manufacturers have committed to reaching carbon neutrality throughout the cement-concrete-construction value chain by 2050. The cement and concrete industries have developed a roadmap outlining opportunities and actions to reach carbon neutrality that involve the entire value chain, starting at the cement plant and extending through the entire life cycle of the built environment…
Using concrete as a carbon sink, the 5 links in the value chain include the:
—production of clinker
—manufacture and shipment of cement
—production of concrete
—construction of the built environment
—capture of carbon dioxide
Each link identifies specific targets, timelines, and technologies to reach the goal of carbon neutrality
The approach in this Roadmap leverages each step of the value chain from the farthest upstream to the final reuse and recycling phase. Cement and concrete manufacturers do not control every link in the value chain, but the Roadmap provides direction and incentives that spur action.
To read the entire ARTICLE titled “Roadmap to Carbon Neutrality“, please go to: https://cptechcenter.us10.list-manage.com/track/click?u=4bf55bc365dca0e5c928442da&id=1521191076&e=2945805a7f
Featured FHWA Concrete Clips
This quarter features 3 Concrete Clips addressing Real-Time Smoothness (RTS), including:
Click on each to go to 3 individual YouTube VIDEOs
Overview of RTS & Associated Technologies • RTS sensor installation • RTS data analysis
Learn about . . . CONCRETE PERMEABILITY
the National Concrete Pavement Technology Center (CP Tech Center) “Concrete Infrastructure Research Database” is of in-progress and recently completed research related to concrete pavements and bridge decks across the US is partially a product of the former CP Road Map (or Long-Term Plan for Concrete Pavement Research and Technology). It is updated twice a year. Research included is identified via the Transportation Research Board (TRB) list of Research in Progress (RiP), newsletters from across the concrete industry, and agency websites.
Below are the first several hits for the example search query “PERMEABILITY” from the database that covers both in-progress and recently completed concrete pavement and bridge deck research:
Please click to go to the CP Tech Center WEB PAGE DATABASE
For the CP Tech Center Concrete Infrastructure Research Database, please click on image above, or go to: https://cptechcenter.org/concrete-infrastructure-research-database/?utm_source=CP+Tech+Center&utm_campaign=8343924cb4-NC2+E-News—Winter+2021-2022&utm_medium=email&utm_term=0_07a32343e1-8343924cb4-169971045
IMPORTANT LINKS:
MAP BRIEF: https://intrans.iastate.edu/app/uploads/2022/01/MAPbriefWinter2021.pdf
NC² “Moving Advancements into Practice (MAP) BRIEF WINTER 2021-2022“: “Optimizing Concrete Pavement Opening to Traffic”: online, please go to: https://mailchi.mp/d5400af87b6d/winter-2021-2022-nc2-news?e=2945805a7f
To find out more about the CP Road Map, or to get involved, please contact:
Steve Tritsch, HCE Services, Inc.
E-mail: stritsch@iastate.edu | Phone: 515-294-3230
CP Tech Center | 2711 S Loop Drive • Suite 4700 | Ames, IA 50010