Recent studies show sugarcane bagasse ash and marble waste are used as fillers in concrete mixtures to produce more environmentally friendly construction material. The characteristics of these inputs become the basis for their utilization. Marbles are known to contain silicon-dioxide/silica (SiO2), calcium oxide (CaO), and magnesium oxide (MgO) as the primary chemical components. Meanwhile, the bagasse possesses similar content as the main constituents of Portland cement, including silica (SiO2) and ferrite (Fe2O3) believed to increase the compressive strength of concrete. The aim of this study, therefore, was to determine the effects of the quality of marble waste and bagasse ash on the compressive strength of concrete. This paper applied SNI 03-2834-2000 standard with compressive strength of 30 MPa, cube specimen with 15cm side measurement, and test age of 14 and 28 days. Also, the composition of the mixture was varied at 12% marble waste, 6% bagasse ash, and 12% marble waste mixture+6% bagasse ash. The results showed the 12% marble waste mixture expressed the highest compressive strength of 39.93 MPa or an increase of 25.37% against normal concrete, while the 6% bagasse ash decreased to 26.68 MPa or an estimated -13.25%. This decline is due to corrosion observed in the bagasse and therefore tends to alter the quality of the concrete mixture. Furthermore, 12% of marble waste demonstrated useful workability and is suitable for enhancing compressive strength.

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