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

Journal Article · · Journal of Advanced Concrete Technology
DOI:https://doi.org/10.3151/jact.21.322· OSTI ID:1990062
 [1];  [2];  [1];  [1]
  1. University of Michigan, Ann Arbor, MI (United States)
  2. Wuhan University (China)

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. As a result, 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.

Research Organization:
Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
FE0030684
OSTI ID:
1990062
Journal Information:
Journal of Advanced Concrete Technology, Vol. 21, Issue 4; ISSN 1346-8014
Publisher:
Japan Concrete InstituteCopyright Statement
Country of Publication:
United States
Language:
English

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