Paver blocks are a durable, low-maintenance form of exterior pavement widely used for roads, footpaths and parkingareas. This study investigates the feasibility of using mild steel lathe waste, an industrial by-product otherwise disposed of on barrenland, as a partial replacement for fine aggregate in the manufacture of concrete paver blocks. Lathe scrap, available in fibrous formfrom machining operations, was used to replace 20% of the fine aggregate in an M35/M40 design mix. Basic materialcharacterization tests (specific gravity, sieve analysis, consistency, and setting time) were carried out on cement, fine aggregate andcoarse aggregate, followed by casting and curing of paver block specimens for 7, 14 and 28 days. The compressive strength andweight of the modified paver blocks were compared against conventional concrete paver blocks. Results show that partial replacementwith lathe scrap increased the weight of the paver block by about 1.07% and improved the 28-day compressive strength byapproximately 44% relative to the conventional block, confirming that mild steel lathe waste can be effectively reused as asustainable, cost-effective reinforcing material in pavement construction.Key words—Paver block, mild steel lathe waste, fine aggregate replacement, compressive strength, sustainable construction.