The Fall 2021 newsletter of the National Concrete Consortium includes the following items:
• Moving Advancements into Practice (MAP) Brief titled Effects of Vibration on Concrete Mixtures is now available from the NC² Resource Library. Vibration is important for consolidation of fresh concrete, but improper vibration can lead to mixture segregation, removal of air and the movement of water toward form walls, producing surface voids. The brief describes an investigation into the nature of vibration, the mechanical properties that cause material separation and concrete load relationships under dynamic conditions.
• 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.
• 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.
• 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.
• FHWA Concrete Clips: Workability and FHWA Mobile Concrete Technology Center
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