Natural aggregate is the main source of aggregate used in concrete work in Iraq. Synthetic aggregate is also used in limited scale around the world. An industrial solid waste is produced from iron and steel industry. It was physically treated and fully inspected and incorporated in concrete as coarse aggregate. The concrete mixes were made with three mix proportions 1:1:2, 1:1.5:3 and 1:2:4. Each mix was made with different water/cement ratio to cover wide range of workability. In the present work some characteristics of the prepared mixes are evaluated and discussed. The characteristics include; static modulus of rigidity, rebound number and chemical resistance towards some acids and salts solutions. For comparison purposes conventional concrete mixes are prepared and tested. The results obtained confirmed that the concrete mixes made with the waste material gave higher modulus of rigidity, higher rebound number and higher chemical resistance towards the expose acids salts solutions compared with the conventional concrete mixes. The results obtained insure that the reuse of the waste material gives an approach to solve the pollution problems that arise from an accumulation of the waste in the site of production, at the same time, modified properties are added to the concrete. Especially previous investigations regarding other characteristics revealed that the concrete mixes made with the waste material possessed superior modified properties.
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Abdulkerim H. Ghailan (2005) studied this question.