QUIRINO, L. B.; BRITO, L.B.Q.; BRITO, LOUISE BRASILEIRO QUIRINO.; http://lattes.cnpq.br/2017193309708624; BRITO, Louise Brasileiro Quirino.
Resumen:
Glass can be endlessly recycled without loss of mass or properties. The importance of
solid waste recycling to the environment is known, but the use of artisanal techniques
for glass recycling is still on the rise. The present work aimed to investigate the
possibility of recycling glassy residues in the development of cast elements applied to
architectural projects. It was also emphasized the possibility of replacing the pure fine
silica (99.00% SiO2) of the molds by river (77.62% SiO2) and sea sand (83.26% SiO2),
aiming to propose technological and technological alternatives. for the design of molds
for the reuse of such waste. The materials were benefited and it was possible to identify
the composition of the glasses as silica-soda-lime. In the studies of composition and
characterization of materials, three mold compositions (MR, MM and MS) were
generated, where the refractory component was the main differentiator. After testing
and analysis, we chose to use river sand for ease of obtaining, demoulding and lower
cost. Using mainly the design tools, new configurations for the hollow elements were
developed. Then new forms and techniques of rapid prototyping were studied and
performed. To obtain the castings from the glass, the final molds were made with the
composition of plaster, river sand, kaolin and water. Inside was deposited the glass
mixture VB9A1-4, which is a mixture of heterogeneous texture composed of 90% white
glass and 10% blue glass with grain size between 2.36 and 4.76mm. Then, they were
submitted to different heat treatments, which varied the maximum temperatures
reached 840, 880 and 920oC and the time left at 30, 60 and 90 minutes, resulting in
melting and annealing. The physical-mechanical characterization of the castings
showed that at higher temperatures and times, a material more resistant to
compression is obtained, a fact attributed to the better sintering occurred, with the
appearance of the mattest surface, homogeneous, opaque and smooth, where the
crystalline peaks. showed to be more intense compared to those submitted to heat
treatments of shorter time and temperature. Being TT3-B (melting temperature 920oC
for 90 minutes) the most suitable for this work.
