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Concrete cast in the water are a great innovation for deep concrete foundations, they are technological, economic and social. Therefore, it is important to reach a suitable formulation concrete meets the rheological criteria (flow, good wash resistance, good flow, no segregation, homogeneity, chemical compatibility) and the compressive strength. This work focuses on the study of the influence of additives on the properties of concrete applied to deep marine foundations. The experimental study aims to:*The optimization of anti washing adjuvants and the super plasticizer.*Follow the contribution of adjuvants for both super plasticizers and anti-washing on the rheological criteria sunk underwater concrete and grout mortars in fresh and hardened state. The laboratory tests include:*The design of mixtures of different strengths from local materials (based on portland cement HRS 32, 5),and the optimization of adjuvant anti washout test dive to follow the role of these additives on the properties of concrete in the fresh state.*Optimizing adjuvants super plasticizers and follow its influence on the criteria mortars fresh by the method of grout*The characterization tests of concrete in the hardened state including destructive and non destructive tests performed on specimens made in concrete (based on portland cement), with varying dosages and adjuvants at different times (28d and 90d)

Influence of adjuvants on the properties of underwater cast concrete on base of cement (HRS 32.5 N)