Surface roughness of stone material determines its quality and project area. Polishing process is also important in terms of stone cost and product capacity. Although many authors have investigated stone surface roughness, a detailed investigation on the effect of mould pressure on surface roughness has not been carried out. In this study, industrial-scale grinding tests have been performed on five different marbles under varying head pressures, and the surface roughness values have been determined for each test level. The results show that the applied head pressure and the marble characteristics greatly influence surface roughness. Grain size and porosity were found to be the two main workpiece properties affecting surface roughness. It is shown that adjustment of the head pressure by considering the grit size of the used abrasive, improves the surface quality of the processed marbles.
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