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Previous issue date: 2014-02-07 / Devido ao crescimento da constru??o civil s?o gerados grandes quantidades de rejeitos de gesso e chamote de telha. Com isso, foi produzido um comp?sito cer?mico viabilizando a t?cnica do aproveitamento desses rejeitos como mat?ria-prima utilizando diferentes propor??es de massas com: 50% do rejeito de gesso e 50% do chamote de telha para formul??o FA; 90% do rejeito de gesso e 10% do chamote para formul?ao FB; 80% do rejeito de gesso e 20% do chamote de telha formula??o FC; 70% do rejeito de gesso e 30% do chamote formula??o FD e 60% do rejeito de gesso e 40% do chamote de telha para formul?ao FE. Essa mat?rias-primas foram moidas em moinhos de bolas por 60 minutos e peneirados em malha ABNT 200 mesh. Para caracteriza??o preliminares, contou-se com an?lises qu?micas por fluoresc?ncia de raios X (FRX), an?lises mineral?gicas por difra??o de raios X (DRX) e granulometria de cada rejeito. A an?lise termogravim?trica (TG) e calorimetria explorat?ria diferencial (DSC) da formula??o FA. Os corpos-de-prova foram confeccionados por compacta??o uniaxial com press?o de 25 MPa e em seguida sinterizados nas temperaturas de 900, 1000 e 1100?C, com patamar de sinteriza??o de 60 minutos e taxa de aquecimento de 10?C/ min. Para avaliar os ensaios f?sico- mec?nico, foram realizados ensaios tecnol?gicos de retra??o linear, absor??o de ?gua, porosidade aparente, massa especifica aparente e resist?ncia ? flex?o. A superficie de fratura foi caracterizada por microscopia eletr?nica de varredura (MEV). Os resultados mostram que a mistura dos rejeitos em diferentes formula??es apresentam caracter?sticas f?sicas e mineral?gicas semelhantes as mat?rias-primas convencionais . Pode-se concluir que ? poss?vel aproveitar os rejeitos do chamote de telha e gesso para a produ??o de filtros cer?micos, tornando-se uma alternativa vi?vel que trar? diversos benef?cios, como a redu??o da quantidade de rejeitos descartado e redu??o do impacto ambiental, al?m de aumentar o leque de op??es de mat?rias-primas para ind?stria cer?mica. / 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.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/19292 |
| Date | 07 February 2014 |
| Creators | Sousa, Renata Ferreira de |
| Contributors | 12391085400, http://lattes.cnpq.br/7103009428184656, Silva, Gilson Garcia da, 56634161453, http://lattes.cnpq.br/8681275097040450, Souza, Luiz Guilherme Meira de, 25094955420, http://lattes.cnpq.br/0801747108308706, Mendes, Jos? Ubiragi de Lima |
| Publisher | Universidade Federal do Rio Grande do Norte, P?S-GRADUA??O EM ENGENHARIA MEC?NICA, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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