Then, as constitutive model, we use damage, either local damage, where we have to stress tensor and the strain tensor, here we have the tangent modulus, and here we have the damage parameter, which is given from the relationship between damage and undamage area. Actually we take into account that we have damage interaction. And then if we use non-local damage model we obtain an average strain and this is given by average, here we have the waiting function and this one is the strain measure which we have introduced here. Finally, the hydration-dehydration law is given here and the rate of the dehydration is proportional to the rate of the change of evaporated water, the rate for evaporated water divided by the solid density.

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