Substitution of the aggregate by solid waste of blast furnance in the preparation of concrete

In this study we sought to use the crushed crystallized slag of blast furnace. it is used as aggregate in preparingslag concrete filling of steel columns. it is produce by totally or partially replacing the calcareous gravel bycrushed crystallized slag. the study is comparison between slag concrete and ordinary concrete. thecharacterization of these concretes was made based on their mechanical properties: i.e., compressive strength,tensile strength and elastic modulus, and their durability: capillary, absorption of water, and hydraulicsshrinkage. the experimental results showed a beneficial effect is bound-up by the percentage of slag used inconcrete.