Recently, the industrial waste resources have been continually developed because of a lack of natural aggregate. In this study, before the applicability of concrete using steel slag as aggregate, the properties were evaluated. From the test results, it is showed that the water aging period of the steel slag had no effect on the air contents, slump, compressive strength and density.

Abstract
 1. 서 론
 2. 실험변수 및 방법
 3. 실험결과
 4. 결 론

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