Made available in DSpace on 2014-12-17T14:07:15Z (GMT). No. of bitstreams: 1
KeiteARA_DISSERT.pdf: 2612937 bytes, checksum: ec59db9fd6d1145d803c85bac8a8f46c (MD5)
Previous issue date: 2013-11-29 / The industrial production of ornamental rocks and the burning of coffee husk generate waste that is discarded into the environment. However, with the study of the incorporation of these residues in ceramic products, may be found an alternative to reducing environmental impacts and detrimental effects on human health caused by its indiscriminate disposal of waste in nature. Thus, this work aimed to study the addition of ashes of the coffee husk and granite residue in matrix of red ceramic. The raw materials were dry milled and sieved to mesh 100. To characterize the raw materials were carried out analyzes of X-ray diffraction (XRD), X-ray fluorescence (XRF), particle size analysis (PSA), differential thermal analysis (DTA) and thermogravimetric analysis (TG). Six formulations were prepared where the clay content was kept constant (70%wt) and ashes contents and granite residue varied from 10, 15, 20 and 30%. Dilatometrics analyzes were performed at four selected formulations, containing them: 100% clay (A100); 70% clay and 30% ashes (A70C30); 70% clay and 30% granite residue (A70G30); and 70% clay, 15% granite residue and 15% ashes (A70G15C15). The samples were prepared by uniaxial compaction with pressure of 25 MPa, and fired at temperatures of 800?C, 850?C, 900?C, 950?C, 1000?C and 1100?C. Assays were performed to determine the linear shrinkage of burning (LSB), water absorption (WA), apparent porosity (AP), density (D) and tensile bending. Also were performed analyzes of X-ray diffraction (XRD) and scanning electron microscopy (SEM) of the samples fired. The formulations incorporating granite residue and/or ashes reached the required limits of water absorption according to NBR 15270-1 and NBR 15310 and tensile bending according to classical literature (SANTOS, 1989) necessary for the production of tiles and ceramic block for masonry sealing / A produ??o industrial de rochas ornamentais e a queima da casca do caf? geram res?duos que s?o descartados no meio ambiente. Por?m, com o estudo da incorpora??o destes res?duos em produtos cer?micos, poder? ser encontrada uma alternativa para a redu??o dos impactos ambientais e efeitos danosos ? sa?de humana causados pelo seu descarte indiscriminado na natureza. Nesse sentido, este trabalho teve como objetivo estudar a adi??o de cinzas da casca do caf? e res?duo de granito na argila usada para a produ??o de cer?mica vermelha. As mat?rias-primas foram mo?das a seco e peneiradas na malha 100 mesh. Para caracterizar as mat?rias-primas foram realizadas as an?lises de difra??o de raios X (DRX), fluoresc?ncia de raios X (FRX), an?lise granulom?trica (AG), an?lise t?rmica diferencial (DTA) e an?lise termogravim?trica (TG). Foram preparadas seis formula??es onde o teor de argila foi mantido constante (70% em peso) e os teores de cinzas e de res?duo de granito variaram de 10, 15, 20 e 30%. Foram realizadas an?lises dilatom?tricas em quatro formula??es selecionadas, contendo elas: 100% argila (A100); 70% argila e 30% cinza (A70C30); 70% argila e 30% res?duo de granito (A70G30); e 70% argila, 15% res?duo de granito e 15% cinza (A70G15C15). As amostras foram confeccionadas por compacta??o uniaxial com press?o de 25 MPa, e queimadas ?s temperaturas de 800?C, 850?C, 900?C, 950?C, 1000?C e 1100?C. Foram realizados ensaios para determinar a retra??o linear de queima (RLq), absor??o de ?gua (AA), porosidade aparente (PA), massa espec?fica aparente (MEA) e tens?o de ruptura ? flex?o (TRF). Foram realizadas tamb?m an?lises de difra??o de raios X (DRX) e microscopia eletr?nica de varredura (MEV) das amostras queimadas. As formula??es com incorpora??o de res?duo de granito e/ou cinza alcan?aram os limites exigidos de absor??o de ?gua segundo as normas NBR 15270-1 e 15310 e de tens?o de ruptura ? flex?o segundo a literatura cl?ssica (SANTOS, 1989), necess?rios para a produ??o de telhas e blocos cer?micos para alvenaria de veda??o
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/12821 |
| Date | 29 November 2013 |
| Creators | Avelino, Keite Anny Rocha |
| Contributors | CPF:50580396720, http://lattes.cnpq.br/5460040602567184, Costa, Francisco Canind? Camilo da, CPF:46662642487, http://lattes.cnpq.br/8395852756851747, Silva, Jaquel?gia Brito da, CPF:02585622428, http://lattes.cnpq.br/5948828937239319, Oliveira, Rosane Maria Pessoa Bet?nio, CPF:63758300444, http://lattes.cnpq.br/6954460873403904, Acchar, Wilson |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Ci?ncia e Engenharia de Materiais, UFRN, BR, Processamento de Materiais a partir do P?; Pol?meros e Comp?sitos; Processamento de Materiais a part |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
Page generated in 0.0019 seconds