Manufacturing and characterization of epoxy granite for use in machine tools
Keywords:
epoxy granite, composite material, reinforcement material, compression, flexionAbstract
Composite materials has been studied for their use in the elaboration of precision machine tool foundations. Epoxy granite is one of these composite materials with an epoxy matrix and a reinforcement of different-grain-size granite particles. The epoxy granite samples were characterized by scanning electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffraction, surface area determination, viscosity analysis, density determination and compression and flexion tests. The results indicate that the epoxy granite samples with a composition of 30% matrix and 70% reinforcement show the highest values of elastic modulus (7,94 GPa compression, 2,78 GPa flexion), yield strength (73,96 MPa compression, 62,68 MPa flexion) and maximum stress (82,29 MPa compression, 68,09 MPa flexion). The results obtained become epoxy granite as a promising material for the referred application. Finally, it was proved that granite particles size lower than 149 µm are suitable as reinforcement material due to small value surface area, appropriate settling velocity and low quantity of cracks and pores in the grains.
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