Thermal and mechanical characterization of blindex glass powder residue® for the production of ecological coating

Abstract

The science of materials has great interest in the development of new composites, therefore, this work aims to obtain a new material using the waste produced by the industries themselves and which in many cases produce a serious problem for the environment. For the development of this research, was used the residue in the form of mud resulting from the cutting process in the manufacture of flat glazing. The samples obtained dehydrated for 24 h at a temperature of 100 °C. The samples were pressed using hydraulic press with a capacity of 150 ton/cm2 resulting in proof body's with dimensions in the order of 105 mm long, 52 mm wide and 5.7 mm thick and submitted the process of sintering at different temperatures in ambient atmosphere. The characterizations of proof bodies applying thermal analysis technique (TGA), presented evaporation of surface H2O and to the degradation of the molecules of Na2O, K2O and P2O5 until 100 °C. In the range between 200 °C and 600 °C the curve has a more linear attributed to the thermal degradation of the Al2O3, MgO and Fe2O3 molecules and a thermal stability above 600 °C. The x-ray diffraction analyses (XRD), with the precursor glass powder presented characteristic of a standard amorphous structure and with the powders of sintered proof body's at different temperatures, observed the characteristic peaks of calcite (CaCo3), cristobalite (SiO2), quartz (SiO2) and low silicon oxide (SiO2) crystals. The characterizations using scanning electron microscopy technique (SEM) show a homogeneous distribution of particles with sizes in the order of 30 μm. The mechanical characterizations in the specimens applying bending rupture tests showed range of rupture modules of the 31.92 kgf/cm2 and 55.28 kgf/cm2 to the range temperature between 200 °C and 600 °C. The characterizations and water absorption tests apresented that there is a great advantage in the use of blindex® glass powder residue for the manufacture of a new ecological coating, this material can be applied more abrasively to paving blocks, septic sewer tanks, grease traps, wall building blocks and in the most finished form it can be applied as a tactile floor, internal coatings in the form of tablets for bathroom and kitchen and other finishes to the civil construction sector.