A large amount of by-products is generated by industries, becoming needed to find a destination for these wastes. Copper slag from the abrasive process is an example, which, after the blasting cycles, is discarded into the environment. The use of this residue in the paving can be an alternative destination, besides avoiding possible environmental impacts. This research presents the study of the incorporation of post-blasted copper slag to the natural soil of Sergipe and Portland cement. The materials used were sand-clayey soil, slag from blasting process and cement of high early strength. Laboratory tests carried out involved geotechnical characterization, compaction, california bearing ratio, physic-chemical dosage, unconfined compressive strength and tensile strength, resilient modulus, durability test, permeability test, chemical and mineralogical analysis and microscopy. The computer program SisPav was used to simulate the design of pavement of the researched material. It was observed a cement content between 7 and 9 percent for the soil and that the slag provides a granulometric stabilization with reduction of about 3 percent of cement, in relation to the soil-cement. The mixture with 30 percent of slag and 5 percent of cement reached highest strength and resilient modulus, lowest mass loss, same tensile strength compared to the mixture without slag, and reduced permeability compared to natural soil. The results indicate the use of post-blasted copper slag in mixtures with soil-cement for application in the base of pavements, contributing in a mitigating action of the impacts to the environment with a more noble purpose to this residue.