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Loukili, A.
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- 2021Impact of super absorbent polymers on early age behavior of high performance concrete walls
- 2013ACOUSTIC EMISSION MONITORING AND QUANTITATIVE EVALUATION OF DAMAGE IN CONCRETE BEAMS UNDER CREEP
- 2013Multi-scales Characterization of the Early-age Creep of Concretecitations
- 2013Design of polymeric capsules for autonomous healing of cracks in cementitious materials
- 2011Performance-based design and carbonation of concrete with high fly ash contentcitations
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document
Multi-scales Characterization of the Early-age Creep of Concrete
Abstract
Concrete is a heterogeneous material that develops delayed strains under a constant load. These deformations are related to micromechanisms which occur in its microstructure. To model this behaviour a new numerical multi-scales method is suggested. Based on a method for the calculation of the effective response for a non-aging material, an extension to aging materials has been developed. This method operates directly in space-time and avoids the difficulties of Laplace Carson transform inversion. The delayed strains are calculated in a representative elementary volume thanks to classical finite elements method which allows determining the components of the creep compliance tensor. First of all, calculations have been performed for an uni-axial loading to model the creep strain at different scales in order to give the visco-elastic property of calcium silicate hydrates. Then, the evolution of the microstructure with age has been considered to model the creep at early-ages of concrete.