Nowadays concrete as the most widely used building material plays on undeniable role in the development of infrastructures avoid the world. Concrete has been known as a material mast wildly being used by human because of the advantages such as ductility and easy plasticity‚ high resistance against fire‚ good stability against climatic fac soon. Portland cement is the main component of concrete which is not compatible with the environment. Production of one ton of Portland cement‚ produces one ton of carbon dioxide which releases 5% of global carbon dioxide. On the other land cement production consumes large amounts of natural resources such as coal and fossil fuel. Several attempts have been made to produce replacing supplement for Portland cement in order to protect the global environment from the impact of cement production. These supplements contain fly ash‚ slag‚ zeolite‚ silica fume‚ rice hull ash‚ metakaolin‚ …. Which can replace cement with lower production costs and more environment compatibility compared to Portland cement can concrete. Dams and other hydraulic structures are structures with long-term exploitation age whose long logging is durability particularly importance due to high maintenance costs. Due to constant contact some of the basic components concrete structures such as bridge‚ columns watering‚ tunnels‚ overflowing of dams‚ … have with each other. Being exposed to constant melting and freezing and the risk of sulfate attaches for these components it seems necessary to conduct of a research study on the characteristics of this new generation of concrete. These situations and to analyze the influential parameters on the quality of this type of concrete. In the present study‚ the effects of pozzolans on the durability of alkali activated slag in hydraulic structure. Alkali activated slag is produced by activating the slag in the combination with aggregates with the help of alkali solutions including sodium silicate and sodium hydroxide. In order to different percentages of the two types of pozzolans namely zeolite and metakaolin were. Examined and optimized percentages were calculated. Tastes to determine the permanents affecting the durability of concrete are performed. In a hydraulic strictures intending compressive strength‚ water absorption and changes weight and dimes of concrete samples are according to standard. based on the result fund the percentage replacement of slag with zeolite from 15% to 35% of the samples submerged in solution of magnesium sulfate 5% increases durability of concrete with alkali activated slag and slag as well as the parentage change from 15% to 35% of metakaolin to reduce the durability concrete in this environment. Keywords: hydraulic structures‚ alkali- activated slag concrete‚ sulfate attack‚ freeze-thaw cycles‚ zeolite‚ metakaolin‚ compressive strength‚ water absorption.