Influencing effect of minerals composition in natural granite rocks on surface roughness

Abstract

The machining of natural rocks is gaining ground in art and architecture. However, the parameters influencing the design of surfaces with low surface roughness values are still the subject of research. In this study, we analysed the composition of granite specimens to examine their effect on surface roughness. 5 different granite samples were milled and then examined with XRD equipment. Minerals on the surface were analysed by light microscopy and scanning electron microscopy. Then the surface area of the minerals was measured with a 3D imaging system for surface roughness. Based on the obtained results, we examined the amount of constituents of each mineral and the value of the surface roughness of the minerals. The results showed that changes in certain mineral constituents affect the value of surface roughness during machining. By this, the expected surface roughness value of the rocks can be predicted based on the composition.

Keywords

• Minerals of granite
• Surface roughness
• Components
• Light microscope
• XRD
• 3D measurement system