The National Concrete Pavement Technology Center (CP Tech Center) release quarterly “Moving Advancements into Practice” (MAP) Briefs to promote ‘Best practices and promising technologies that can be used now to enhance concrete paving’.
This MAP brief covers vibration and its effects on concrete mixtures. Vibration is used to help fresh concrete flow around reinforcement and to fill forms, as well as to remove entrapped air bubbles. While vibration is important for proper consolidation, care must be taken to avoid segregating mixtures or removing en- trained air. In addition, there is a growing body of evidence indicating that improper vibration frequency moves water away from the vibrator toward form walls, result- ing in bug holes and voids on the external faces of the forms for structural elements.
To download the 4-page Fall 2021 MAP Brief, please click on image above, or go to: https://intrans.iastate.edu/app/uploads/2021/09/MAPbriefFall2021.pdf?utm_source=CP+Tech+Center&utm_campaign=b0b3f543db-NC2+E-News—Fall+2021&utm_medium=email&utm_term=0_07a32343e1-b0b3f543db-169971045
News from the Road
“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.
Summary Findings of Re-Engineered Continuously Reinforced Concrete Pavement (CRCP): Volume 1
The Illinois Tollway seeks balanced, tested CRCP solutions with the same or lower initial cost and life-cycle cost assessment as other paving options. This study therefore investigated internally cured concrete mixtures containing supplementary cementitious materials (SCMs) in the lab along with crack properties and CRCP performance under environmental and falling weight deflectometer (FWD) loading in the field. (Read this report….)
Mitigation of Corrosion in Continuously Reinforced Concrete Pavement:
This project evaluated CRCPs throughout South Dakota in order to determine the extent of steel reinforcement corrosion in selected Interstate pavements. Topically applied corrosion mitigation products were also evaluated in the lab and on CRCP test sections. (Read this report….)
Development of Pavement Performance Models for Pavement Management Incorporating Treatment Type:
Reducing error in agencies’ predictive models of pavement deterioration enables timely intervention and accurate planning, often leading to significant savings. Therefore, when TxDOT’s Pavement Management Information System (PMIS) was recently replaced by Pavement Analyst™ (PA), the agency’s current performance models were calibrated and updated, and more accurate roughness models were developed for PA implementation. (Read this report….)
Click to go to individual videos
Featured FHWA Concrete Clips (+ MCTC News)
This quarter, CP Tech features the Concrete Clips addressing “Workability“ and the “FHWA Mobile Concrete Technology Center“ (MCTC).
While MCTC travel was temporarily halted due to the COVID-19 pandemic, it should be noted that the MCTC is now available again to provide free, practical, live training sessions on various concrete testing topics via field visit as well as via demonstrations at conferences or open houses.
Agencies or contractors interested in requesting an MCTC field visit to gain (free!) hands-on experience with state-of-the-art concrete paving technologies and practices and/or in taking advantage of the MCTC’s valued equipment loan program, please contact: Mike Praul | E-mail: mailto:Michael.Praul@dot.gov
For the loan webpage, please go to: https://cptechcenter.us10.list-manage.com/track/click?u=4bf55bc365dca0e5c928442da&id=3163447744&e=2945805a7f
Learn about. . .Evaluating Performance
Above, are the first several hits for the example search query “evaluating performance” from the Concrete Infrastructure Research Database that covers both in-progress and recently completed concrete pavement and bridge deck research. This database 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)—see link below for ISCP article. 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.
For the Database, please click on image above, or go to: https://cptechcenter.us10.list-manage.com/track/click?u=4bf55bc365dca0e5c928442da&id=9ff32ef6e6&e=2945805a7f
For more information & Performance Query: https://cptechcenter.org/concrete-infrastructure-research-database/?utm_source=CP+Tech+Center&utm_campaign=b0b3f543db-NC2+E-News—Fall+2021&utm_medium=email&utm_term=0_07a32343e1-b0b3f543db-169971045
TIMELINE/HISTORY of the CP ROAD MAP (Moving Advancements into Place): produced by amy dean: