Worldwide managing thrash is a serious problem. Industrial waste and construction waste are a major threat since these wastes are randomly disposed of in landfills. Granite waste is generally produced in the form of sludge when the granite rocks are cut and polished to the required sizes. This granite sludge thrash is a significant contributor to the thrash generated by industrial activities. These tiny particles of granite waste close the tiny spaces in the soil, which stops water from seeping through and renders the land useless. Also, mortar prepared with ordinary Portland cement is probably the most largely used man-made material in the world. But mortar production is of concern worldwide because impacts the environment's CO2 emission. Hence, an attempt is made to reduce the use of cement content by using granite waste for cement paste in mortar mixes. Locally available Granite waste (GW) is used in mortar mixes as a filler material. Replacement of cement paste is made by levels of 0, 5%, 10%, 15%, 20%, 25%, 30%, and 40% by weight of cement paste. For each replacement level and for a higher water-cement ratio of 0.7, 0.8, and 0.9 the mortar’s workability and compressive strength are checked. The curing period of 7,14 and 28 days is taken for testing of specimens. Mortar mixes with 40% replacement of cement paste with granite powder have good workability and compressive strength at 7, 14, and 28 days of curing.