Obtenção e caracterização de um compósito a base de rejeito do gesso e chamote de telha visando a obtenção de filtros cerâmicos
Due to the accumulation of waste gypsum and grog tile generated the growth of civil industry , we sought in this work to develop a ceramic composite technique enabling the exploitation of these wastes as raw materials using different proportions of pasta : 50 % of the tailings gypsum and 50 % of...
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| Định dạng: | Dissertação |
| Ngôn ngữ: | por |
| Được phát hành: |
Universidade Federal do Rio Grande do Norte
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| Những chủ đề: | |
| Truy cập trực tuyến: | https://repositorio.ufrn.br/jspui/handle/123456789/19292 |
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| Tóm tắt: | Due to the accumulation of waste gypsum and grog tile generated the growth of civil industry
, we sought in this work to develop a ceramic composite technique enabling the exploitation
of these wastes as raw materials using different proportions of pasta : 50 % of the tailings
gypsum and 50 % of grog tile for formulation FA , 90 % of waste gypsum and 10 % of grog
to formulation FB , 80 % of waste gypsum and 20 % of waste ceramic tile FC formulation ,
70 % of waste gypsum and 30 % of grog FD formulation and 60 % of waste gypsum and 40
% of waste ceramic tile for formulation FE . These raw materials were milled in ball mills for
60 minutes and sieved on 200-mesh knitted ABNT. For preliminary characterization, counted
on chemical analysis by X-ray fluorescence (XRF), mineralogical analysis by X-ray
diffraction (XRD) and particle size of each waste. Thermogravimetric analysis (TG) and
differential scanning calorimetry (DSC) formulation FA. The body -specimens were prepared
by uniaxial compaction at a pressure of 25 MPa and then sintered at temperatures of 900 ,
1000 and 1100 ° C with sintering level of 60 minutes and heating rate of 10 ° C / min. To
evaluate the physical and mechanical tests, technological tests of linear shrinkage, water
absorption, apparent porosity, apparent specific gravity and flexural strength were performed .
The fracture surface was characterized by scanning (SEM) electron microscopy. The results
show that the mixing of the waste in different formulations have similar physical and
mineralogical characteristics of the conventional materials . It can be concluded that it is
possible to take advantage of the tailings grog tile and gypsum for the production of ceramic
filters , making it a viable alternative that will bring many benefits , such as reducing the
amount of waste disposed of and reduce environmental impact , and increase the range of raw
materials for ceramics industry options. |
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