Abstract
The purpose of this study is to adjust the qualities of concrete by using silica fume in place of cement and marble powder as a waste material to replace some of the sand. In the concrete mixtures, marble powder was substituted for sand at a weight-per-replacement rate of 5%, 10%, 15%, 20% and 25% and silica fume for cement at a rate of 5%, 7.5% and 12.5%. Effects on the concrete are noted. Marble powder may be disposed of and makes concrete lighter when it is used in construction. Tests are carried out to determine the compressive and tensile strengths of concrete at 28, 56 and 90 days. Marble powder will help to improve the strength of concrete. The strongest results were 15% sand replacement for marble powder and 7.5% cement replacement for silica fume.
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