This article presents the results obtained in the mechanical properties of the addition of soot, which is a byproduct of cooking the bricks used in Santander brickworks. The clay used was initially characterized using the manual granulometric method, following the NSR 10 standard. Chemical and mineralogical compositions were analyzed using a X- ray Diffraction technique. The analysis of the mechanical properties of ceramic was developed through compression tests, according to the guidelines of the Colombian NTC: 4017 Technical Standard. The results show that adding less than 60% in mass of soot residues, when clay is added, increases the compressive strength to 265.31 kg / cm2 in average. This increase is significant taking into account that the minimum compression value according to the standard is 140 kgf/cm2.