Use of marble and granite dust waste as partial replacement of fine aggregates in concrete

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The growth in Infrastructural development resulted in fast decline of available natural resources. In contrast the marble and granite production has generated a very huge amount of by-products in the form of fine particles which causes large scale environmental pollution. This has led to a major concern in the environmental as well as construction industry due to the disposal of these million tons of fine particles. The purpose of this study is to experimentally investigate the compatibility of marble and granite dust by-product for replacing of fine aggregates in concrete partly. In this work, a mixture of marble and granite dust in ratio 0.5:0.5 is used as a for replacing of sand in different percentages (10%,20%,30%,40%,50%) by weight and cement is partially replaced with slag (GGBS) by a by 40%. Influence of replacement of sand with marble and granite dust on the strength behaviour on concrete was studied at curing ages 7 and 28 days and the results are compared with conventional concrete blocks. A 20% replacement of fine aggregates with marble and granite dust mixture resulted in 23.34% and 14.4% increase in compressive strength was at 7 and 28 days of curing, as compared to controlled concrete. The results of the experimental study show that, mixture of marble and granite dust can partially be used in place of fine aggregate in concrete and saves considerable amount of sand there by preserving the valuable natural resource resulting in sustainable replacement for sand.