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Title: A 12 year EDF study of concrete creep under uniaxial and biaxial loading

This paper presents a 12-year-long creep and shrinkage experimental campaign on cylindrical and prismatic concrete samples under uniaxial and biaxial stress, respectively. The motivation for the study is the need for predicting the delayed strains and the pre-stress loss of concrete containment buildings of nuclear power plants. Two subjects are central in this regard: the creep strain's long-term evolution and the creep Poisson's ratio. A greater understanding of these areas is necessary to ensure reliable predictions of the long-term behavior of the concrete containment buildings.Long-term basic creep appears to evolve as a logarithm function of time in the range of 3 to 10 years of testing. Similar trends are observed for drying creep, autogenous shrinkage, and drying shrinkage testing, which suggests that all delayed strains obtained using different loading and drying conditions originate from a common mechanism.The creep Poisson's ratio derived from the biaxial tests is approximately constant over time for both the basic and drying creep tests (creep strains corrected by the shrinkage strain).It is also shown that the biaxial non-drying samples undergo a significant increase in Young's modulus after 10 years.
Authors:
 [1] ; ORCiD logo [2] ;  [3] ;  [3] ;  [4] ;  [4] ;  [5] ;  [3] ;  [6] ;  [1] ;  [3]
  1. Electricite de France (EDF), Moret-sur-Loing (France)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. DIPNN CEIDRE/TEGG, Camp de Menthe (France)
  4. Electricite de France (EDF), Marseille (France)
  5. Electricite de France (EDF), Villeurbane (France)
  6. Electricite de France (EDF), Lyon (France)
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Cement and Concrete Research
Additional Journal Information:
Journal Volume: 103; Journal Issue: C; Journal ID: ISSN 0008-8846
Publisher:
Elsevier
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1435289

Charpin, Laurent, Le Pape, Yann, Coustabeau, Eric, Toppani, Eric, Heinfling, Gregory, Le Bellego, Caroline, Masson, Benoit, Montalvo, Jose, Courtois, Alexis, Sanahuja, Julien, and Reviron, Nanthilde. A 12 year EDF study of concrete creep under uniaxial and biaxial loading. United States: N. p., Web. doi:10.1016/j.cemconres.2017.10.009.
Charpin, Laurent, Le Pape, Yann, Coustabeau, Eric, Toppani, Eric, Heinfling, Gregory, Le Bellego, Caroline, Masson, Benoit, Montalvo, Jose, Courtois, Alexis, Sanahuja, Julien, & Reviron, Nanthilde. A 12 year EDF study of concrete creep under uniaxial and biaxial loading. United States. doi:10.1016/j.cemconres.2017.10.009.
Charpin, Laurent, Le Pape, Yann, Coustabeau, Eric, Toppani, Eric, Heinfling, Gregory, Le Bellego, Caroline, Masson, Benoit, Montalvo, Jose, Courtois, Alexis, Sanahuja, Julien, and Reviron, Nanthilde. 2017. "A 12 year EDF study of concrete creep under uniaxial and biaxial loading". United States. doi:10.1016/j.cemconres.2017.10.009. https://www.osti.gov/servlets/purl/1435289.
@article{osti_1435289,
title = {A 12 year EDF study of concrete creep under uniaxial and biaxial loading},
author = {Charpin, Laurent and Le Pape, Yann and Coustabeau, Eric and Toppani, Eric and Heinfling, Gregory and Le Bellego, Caroline and Masson, Benoit and Montalvo, Jose and Courtois, Alexis and Sanahuja, Julien and Reviron, Nanthilde},
abstractNote = {This paper presents a 12-year-long creep and shrinkage experimental campaign on cylindrical and prismatic concrete samples under uniaxial and biaxial stress, respectively. The motivation for the study is the need for predicting the delayed strains and the pre-stress loss of concrete containment buildings of nuclear power plants. Two subjects are central in this regard: the creep strain's long-term evolution and the creep Poisson's ratio. A greater understanding of these areas is necessary to ensure reliable predictions of the long-term behavior of the concrete containment buildings.Long-term basic creep appears to evolve as a logarithm function of time in the range of 3 to 10 years of testing. Similar trends are observed for drying creep, autogenous shrinkage, and drying shrinkage testing, which suggests that all delayed strains obtained using different loading and drying conditions originate from a common mechanism.The creep Poisson's ratio derived from the biaxial tests is approximately constant over time for both the basic and drying creep tests (creep strains corrected by the shrinkage strain).It is also shown that the biaxial non-drying samples undergo a significant increase in Young's modulus after 10 years.},
doi = {10.1016/j.cemconres.2017.10.009},
journal = {Cement and Concrete Research},
number = C,
volume = 103,
place = {United States},
year = {2017},
month = {11}
}