Considered a waste material by mining in Gouveia-MG-Brazil, the fine residue of quartz extraction is of great interest when applied to the soil, since it’s expected to increase its resistive behavior. This research presents a study on the resistance variation of silt soils of the Gouveia-MG region, mixed with 5, 10, 15 and 25% of fine residues, for use in paving layers (sub-grade reinforcement). The residue studied in this research is a very fine material, generated in the extraction of quartz by a mining company. It was analyzed using Scanning Electron Microscopy with X-Ray Fluorescence Spectrometry, X-ray Diffraction and particle size distribution. For the analysis of the resistance of the incorporation of the fine material to the soil, the California Bearing Ratio test (CBR) was used. The results of the chemical characterization of the residue showed predominantly oxygen and aluminum, derived from phyllite, which was predicted for the quartz mines of that region considering the covering soil present in the mines. The soil was characterized as pink sandy silt. Mixtures of 5, 10, 15 and 25% of natural soil and residue were tested. Although the characterization results were consistent, the use of untreated residue decreased the resistance of the natural soil, with decreasing resistances with increased incorporation of the residue.. Due to this, the residue was washed in a # 200 sieve, reducing to almost zero the initial percentage of fines and again incorporated into the soil. The incorporation of the residue will not contaminate the soil. It also increases the puncture resistance when mixed soil contains more than 25% of residue, provided the mining company implements a treatment by sieving and washing the residue before the mixing with soil.