Effet Du Ressuage Sur Le Comportement Mécanique Du Béton Dans Une Régie Aride (cas D’adrar) Etat De L’art

Résumé: The aim of this work is to present a state of the art on the effects of bleeding on he properties and mechanical behavior of poured concrete in an arid region. Although the use of concrete in construction is growing over time, the study of its properties and behavior is still a subject that requires a lot of research. This is due to the peculiarity of the phenomena influence concrete materials especially in arid zones. Concrete after it has been poured is exposed to several problems, one of which is bleeding. The latter is known as a phenomenon of a part of water rising to the surface of fresh concrete. If the evaporation rates remain limited, a film of clear water will appear on the surface of the concrete. In the absence of evaporation, the flow of water exhaled is maximum at the first moments and then decreases until it is canceled, but in arid areas with the presence of high temperature, hot wind and low humidity bleeding increases and produces other phenomena affecting the strength and quality of concrete. This requires precautions to be taken during pouring and when the concrete is fresh and before hardening.

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