Quantify the effect of re-carbonation during the use-phase and end-of-life of concrete pavements
This project seeks to validate and improve quantification methods and simulation models to better understand CO₂ uptake in concrete pavements during their service life and recycled concrete aggregate at the end-of-life phase. Hydrated cement in concrete has the potential to sequester CO₂ during the use and end-of-life phases through carbonation, a mineralization process where atmospheric CO₂ reacts with alkali products like portlandite to form stable carbonates. Pavement systems have significant potential for carbonation due to their constant exposure to the environment, the use of preservation methods like diamond grinding that repeatedly expose fresh hydrated cement, and the stockpiling of crushed concrete at the end of its life, where the increased surface area can enhance carbonation. However, systematic methods for quantifying and addressing this uptake in transportation systems is lacking. In this work, the research team will use laboratory characterization of carbonation depth, analysis of factors influencing RCA carbonation in stockpiles, and validation of diffusion-based models to better inform consideration of carbon sequestration in concrete. By considering regional climate variations and assessing the impacts of preservation practices, this work aims to inform sustainable pavement management practices.
Language
- English
Project
- Status: Active
- Funding: $299,999.00
-
Contract Numbers:
DOT A24-3016
-
Sponsor Organizations:
Center for Emissions Reduction, Resiliency, and Climate Equity in Transportation
Davis, CA United StatesDepartment of Transportation
Office of the Assistant Secretary for Research and Technology
1200 New Jersey Avenue, SE
Washington, DC United States 20590 -
Managing Organizations:
Center for Emissions Reduction, Resiliency, and Climate Equity in Transportation
Davis, CA United StatesUniversity of California, Davis
1 Shields Ave
Davis, California United States 95616 -
Project Managers:
Cliff, Sydney
-
Performing Organizations:
Center for Emissions Reduction, Resiliency, and Climate Equity in Transportation
Davis, CA United StatesUniversity of California, Davis
1 Shields Ave
Davis, California United States 95616 -
Principal Investigators:
Nassiri, Somayeh
Miller, Sabbie
- Start Date: 20250101
- Expected Completion Date: 20251231
- Actual Completion Date: 0
- USDOT Program: Transportation, Planning, Research, and Development
Subject/Index Terms
- TRT Terms: Carbon dioxide; Carbonation; Cement; Concrete pavements; Pavement management systems; Service life
- Subject Areas: Environment; Highways; Materials; Pavements;
Filing Info
- Accession Number: 01944717
- Record Type: Research project
- Source Agency: Center for Emissions Reduction, Resiliency, and Climate Equity in Transportation
- Contract Numbers: DOT A24-3016
- Files: RIP
- Created Date: Jan 31 2025 4:36PM