Comportement d'éprouvettes de béton et de mortier à la mer

Long-term effect on the mortar and concrete in marine environment has been a subject of numerous studies. The effect of sea-water on the mechanical and physico-chemical properties of mortar and concrete exposed for different time span has been analysed in this paper. Different types of cements had been chosen with different levels of clinker and hydraulic binders as well as different amounts of aluminates and sulfates which enhance the chemical reaction with sea water. E/C which contribute appreciably to UC strength and chloride penetration, was kept constant at 0.5 for all the concretes. This paper analyses the results on the chloride ion penetration at a section of concrete samples of dimension 20×20×80cm. The tendency evolutive of mechanical strength has been recalled. The tests results presented here show the relationship between the penetration of chloride ions with that of cement type and amount.