Resumen:
The study here exposed was developed in order to contribute to the recycling and re-valorization of isostatic graphite powder as filler in gypsum pastes. Graphite powder is a waste product obtained from isostatic graphite blocks ground for mold production. The design of these molds is previously processed by Computer-Aided Manufacturing (CAM) and CAD/CAM software applications that uses a tool path for three-dimensional modeling to assist computer-numerically controlled (CNC).
In order to contribute to the knowledge of this material as filler, this paper describes and assesses the microstructure of gypsums with graphite, through the use of a Scanning Electron Microscope and an Energy Dispersive X-ray Spectroscopy (SEM/EDX). Furthermore, the density, water absorption, and mechanical properties of gypsum pastes with addition of graphite filler have been analyzed.
In order to deepen on the knowledge of the influence in the behavior of gypsum commonly used in building, several series of gypsum pastes with 0–5–10–15–20–25% of graphite filler by weight replacement of gypsum, and three different water/gypsum ratios – one of them with plasticizer – have been tested. It was observed that isostatic graphi...