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The Summer 2023 newsletter of the National Concrete Consortium includes the following items:
• Revisiting Concrete Scaling - An unusually high number of problems related to surface distress, often caused by several factors, have been reported this year. The Summer 2023 NC² Moving Advancements into Practice (MAP) Brief from the NC² Resource Library recommends actions to reduce the risk of these surface-related issues.
• Performance Evaluation of Stabilized Support Layers for Concrete Pavements - Research completed by the Illinois Center for Transportation assessed the erosion potential of stabilized support layers under concrete pavements and overlays through laboratory testing and field investigations. The project evaluated whether existing concrete pavements with stabilized subbases and concrete overlays exhibited potential erosion of the underlying support layer.
• Performance of Concrete Overlays over Full Depth Reclamation - Concrete overlays of full depth reclamation (FDR) are a pavement rehabilitation option involving reclamation of existing pavement layers while providing a new concrete surface to the roadway. This report, completed by the National Road Resource Alliance, reviewed nine concrete overlays of FDR that have been constructed in three states since 2006. Design and construction details were collected for each project and performance was analyzed through automated pavement condition data.
• Impact of Curling and Warping on Concrete Pavement: Phase II - This phase of the study, completed by the Institute for Transportation, aimed to evaluate and quantify the impact of curling and warping on Iowa concrete pavements and determine the factors that most influence curling and warping behavior. A high-speed profilometer and a LiDAR device were used to execute a largescale field data collection plan for jointed plain concrete pavement sites. The variables evaluated included temperature and moisture gradients, seasonal and diurnal effects, slab geometry, pavement structural design, mix design and construction conditions.
Click here for the Summer 2023 NCC newsletter which contains separate links to the above reports.
