Impact of Iraqi steel slag used as a partial replacement on ordinary portland cement properties

The need to produce high performance concrete led the researches to try to exploit the potentialities of natural or artificial materials in order to modify the performance of concrete in one hand and replacement part of cement by slag. Slag has been used as a substitute of part of cement after being processed, since its main oxides are similar to those of cement. In this investigation, the effect of steel slag was studied including finesses, consistency, initial and final setting time as well as compressive strength in(7, 28, 90 ) days and absorption of mortar in (7, 28) days were investigated. Results demonstrated that the inclusion of 20% slag as a partial replacement by cement weight showed superior performance over those of the other mixture of steel slag cement, Where the compressive strength after 90 days to replacement case (20%) becomes (40MPs ), and the reduction in water absorption in all cases except at (60%,80%) of replacement.