THE EVALUATION OF STEEL SLAG EFFECT ON THE COMPRESSIVE STRENGTH OF CONCRETE

Abstract

This study was conducted to test the possibility of benefiting from the blast furnaces slag resulting from the production of steel at Giad Factory south of the city of Khartoum –Sudan. The study aimed to determine the effect of partially replacing some of the concrete mix components with steel slag to study the effect on the compressive strength and workability of the concrete mixture. A mix design was prepared for standard according to the British and US by using another mixes where the slag replaced by (10-20-30-40) % of the cement weight. The concrete mixes were designed according to these percentages and were tested for workability by the slump of fresh concrete and the hardened concrete was tested for compressive strength after (7-28) days. When replacing the slag with varying percentages of the cement weight the results show an increase in workability with the increase in the proportion of slag while noting that the compressive strength increased in (10-20) % replacement of slag and it gradually decreases with the increasing of proportion of slag. These results were acceptable and provide an evidence for the possibility of benefiting from the slag in concrete mixes. The study recommended conducting more tests such as test tensile strength.