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This study explores the potential of utilizing ferro manganese slag, a byproduct of the ferroalloy industry, in the production of fly ash bricks to improve sustainability and performance in construction materials. Through an examination of various physical and chemical properties, similarities between ferro manganese slag and fly ash bricks are identified. While bricks containing fly ash exhibit textures akin to ferro manganese fly ash bricks at an approximate 85% comparison rate, those treated with the additive display distinct spherical fly ash particles, indicating a different texture. By blending different proportions of sand and ferro manganese slag, it was founded that adding 10% ferro manganese slag to fly ash bricks with 30% sand significantly enhances compressive strength, reaching 10.5 MPa after 7 days of curing and 11 MPa after 14 days of curing, with water absorption found to be 5.73% which is below acceptable limit 20%. A density test on the generated bricks yielded a figure of 2105 kg/m3, which is 1.2% greater than the density of normal fly ash bricks. It was discovered that the density of traditional bricks was 2079 kg/m3. The addition of this ingredient may have positive effects on recycling and lower production costs for bricks. [ABSTRACT FROM AUTHOR]