Micro-structure detection of a glossy granite surface machined by the grinding process

In the present paper, an investigation was directed towards the micro-structure detection of a glossy granite surface at each separate stage ranging from sawing to grinding. Scanning electron microscope was employed to study the morphologies of the ground surfaces. A portable roughness instrument and a gloss meter were employed to analyze the roughness and glossiness of the ground surface, respectively. It is shown that the prevailing mechanisms for the grinding of granite vary from brittle-mode removal to ductile-mode removal with the reduction of the diamond grit size. The high glossy surface of granite is a low roughness surface which was formed by diamond grinding in the ductile-mode.