The Impact of Carbonation Curing on the Fatigue Behavior of Polyvinyl Alcohol Engineered Cementitious Composites (PVA-ECC)

Use of Engineered Cementitious Composites (ECC) has been proven to enhance structural fatigue resistance and reduce the use-phase emissions for transportation infrastructure. Carbonation curing offers an opportunity to reduce the embodied carbon of ECC via direct CO2 sequestration. In this study, th...

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Bibliographic Details
Published in:Journal of advanced concrete technology 2023-04, Vol.21 (4), p.322-336
Main Authors: Hu, Wei-Hsiu, Zhang, Duo, Ellis, Brian R., Li, Victor C.
Format: Article
Language:English
Subjects:
Carbon dioxide
Carbon sequestration
Carbonation
carbonation curing
CO2 sequestration
Composite materials
Crack propagation
Curing
Deflection
Engineered Cementitious Composites (ECC)
Failure mechanisms
Fatigue failure
Fatigue life
fatigue performance
Fatigue strength
Fiber pullout
Flexural strength
lifecycle CO2 emissions
MATERIALS SCIENCE
Polyvinyl alcohol
Structural members
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Summary:Use of Engineered Cementitious Composites (ECC) has been proven to enhance structural fatigue resistance and reduce the use-phase emissions for transportation infrastructure. Carbonation curing offers an opportunity to reduce the embodied carbon of ECC via direct CO2 sequestration. In this study, the impact of carbonation curing on ECC’s fatigue resistance was examined. ECC’s CO2 uptake, static flexural behavior, flexural fatigue performance, and single fiber pull-out behavior were studied experimentally. Midspan deflection up to 3 million cycles under fatigue load, fatigue stress-life relationship, and failure mechanism for carbonation-cured and air-cured ECC were investigated. Carbonation curing was found to significantly improved the fatigue life of ECC and lowered the midspan deflection under the same stress. Further, CO2-cured ECC can achieve >20% CO2 uptake per cement mass after 24-hour carbonation curing. Carbonation curing increased ECC’s flexural strength by 32% and promoted crack width control capability, with maximum post-fatigue crack width reduced from 148 μm to 76 μm. The positive impact of carbonation curing on the fatigue behavior of ECC simultaneously lowers the embodied and operational carbon of ECC structural members subjected to fatigue loading during service.
ISSN:1346-8014
1347-3913
DOI:10.3151/jact.21.322