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Abstract
ABSTRACT Concrete is a complex multi-scale composite involving multi-physics processes. As it is the only evolving component, the cement paste has a major influence on the mechanical properties of concrete at early age. The homogenization theory for disordered media is used in order to model the development of the elastic properties of a cement paste during its hydration. The morphological model refers to two types of C-S-H distinguished by many authors: high density C-S-H or inner products build up layers surrounding the anhydrous particles, while low density C-S-H or outer products play the role of a porous matrix. The effective Young's modulus evolution with respect to the degree of hydration proves to be in excellent agreement with the experimental results available in the literature.
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