The main goal is to compare lightweight concrete with conventional concrete and to explore the feasibility of using novel pumice stone as a partial substitute for coarse aggregates in M30 concrete grade. Groups were prepared at the composition of 50% cement and replacing 40% silica fume, 10% metakaolin is kept constant in this concrete. The independent t-test computation is done using 80% G-power. M-sand was utilized as the fine aggregate, whereas pumice was used as the coarse aggregate. Metakaolin and silica fume are procured from scientific companies and pumice are arranged from online traders. To determine the compressive strength, a total of 36 cubes were manufactured in two groups. This study shows the statistically significant difference between the t-test on an independent sample of p value is 0.000 (p < 0.05). The group data for a sample group made up of coarse aggregate made up of 40% silica fume, 10% metakaolin, and 40% pumice stone. Mean (34.3311, 43.0000), standard deviation (1.65492, 0.56454), standard error mean (0.39007, 0.13306). The result of a 28-day test for compressive strength on concrete of grade M30 is 34.33 N/mm², on average. The average result for the M30 grade concrete with pumice stone and partial replacement of modified concrete is 37.65 N/mm². Pumice stone, partly modified silica fume, and metakaolin enhanced the compressive strength of concrete by 8.25% as compared to normal concrete, measured by weight of cement. It shows better performance with greater economic effects than conventional concrete.

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