Development of Ceramics Based on Clays from Different Regions in the State of Rio de Janeiro, Brazil

2014 ◽  
Vol 805 ◽  
pp. 530-535 ◽  
Author(s):  
Michelle Pereira Babisk ◽  
Angélica Pereira Ribeiro ◽  
Sergio Neves Monteiro ◽  
Carlos Maurício Fontes Vieira
Keyword(s):  
Flexural Strength ◽  
Water Absorption ◽  
Rio De Janeiro ◽  
Linear Shrinkage ◽  
The State ◽  
Ceramic Production ◽  
Superior Performance ◽  
The North ◽  
Technical Properties ◽  
Density Linear

The state of Rio de Janeiro, southeast of Brazil, has two poles of conventional clay ceramic production, mainly bricks and roofing tiles. In the north region of the state, the county of Campos dos Goytacazes and in the state center, the county of Itaborai, present distinct types of clay. With the aim to improve some characteristics of the Campos dos Goytacazes clay, the objective of this work was to investigate different mixtures with the Itaborai clay. Samples were press-molded with compositions of 0, 25, 50 and 75 wt% of both clays. The samples were fired at 800°C and the technical properties related to plasticity, density, linear shrinkage, water absorption and flexural strength were determined. The results indicated that the superior performance of the Itaborai clay significantly improves that of the Campos dos Goytacazes clay for any incorporated percentage. The mechanisms and reasons for these results are discussed.

Recycling of Steel Sludge into Red Ceramic

2006 ◽  
Vol 530-531 ◽  
pp. 544-549 ◽  
Author(s):  
P.M. Andrade ◽  
Carlos Maurício Fontes Vieira ◽  
Sérgio Neves Monteiro ◽  
F. Vernilli Jr.
Keyword(s):  
Flexural Strength ◽  
Water Absorption ◽  
Bulk Density ◽  
Low Temperatures ◽  
Linear Shrinkage ◽  
Uniaxial Pressure ◽  
Technological Properties ◽  
Sludge Waste ◽  
Kaolinitic Clay ◽  
Density Linear

The present paper has for objective to evaluate the effect of fine steel sludge waste incorporation on the properties and microstructure of a kaolinitic clayey body used to the fabrication of bricks and roofing tiles. Compositions were prepared with additions of waste of 0, 5 and 10 wt.% in a kaolinitic clay from the county of Campos dos Goytacazes, State of Rio de Janeiro, Brazil. To determine the technological properties such as bulk density, linear shrinkage, water absorption and flexural strength, specimens were prepared by uniaxial pressure at 20 MPa and then fired in a laboratory furnace at 700°C, 900°C and 1100°C. The microstructure of the fired specimen was evaluated by SEM. The results showed that the incorporation up to 10 wt. % of fine steel sludge does not change the ceramic properties, specially, at low temperatures. Hence, the recycling of steel sludge into red ceramic fabrication can be considered as an environmentally correct solution for the final disposal of this type of waste.

Study of a Clayey Soil Used in the Fabrication of Red Ceramics in Campos Dos Goytacazes, Brazil

2014 ◽  
Vol 798-799 ◽  
pp. 15-20 ◽  
Author(s):  
Jonas Alexandre ◽  
Afonso Rangel Garcez de Azevedo ◽  
Gustavo de Castro Xavier ◽  
Leonardo Gonçalves Pedroti ◽  
Carlos Maurício Fontes Vieira ◽  
...  
Keyword(s):  
Apparent Density ◽  
Rio De Janeiro ◽  
Clayey Soil ◽  
Linear Shrinkage ◽  
Northern Region ◽  
The State ◽  
Oxide Content ◽  
Technical Properties ◽  
Structural Blocks ◽  
Red Ceramics

In the municipal area of Campos dos Goytacazes, the largest city in the northern region of the state of Rio de Janeiro, southeast of Brazil, there is a clay ceramic industrial pole comprising more than one hundred companies dedicated to the production of bricks, roofing tiles and structural blocks for civil construction. Currently, an estimated production of almost one billion pieces a year attends not only the state of Rio de Janeiro but also the neighbor states of Minas Gerais and Espírito Santo. In this work the characteristics and technical properties of the precursor clayey soil used by one of the leading local industry was studied. The initial characterization was performed by means of granulometric test, based on sieving and sedimentation methods, that allowed the separation of the material in its clay, silt and sand fractions. These fractions were chemically analyzed to evaluate the predominance of oxide content. The fluidity and plasticity limits as well as the apparent density were measured for clay bodies according to the standards. After sintering clay bodies at 700 and 900°C the ceramic technical properties of linear shrinkage, water absorption, apparent density and flexural strength were calculated following the norms. The results indicated that the precursor clay in Campos dos Goytacazes could be used for bricks but need to be incorporated with fluxing compounds to attend the requirements for structural blocks and roofing tiles.

scholarly journals Reptilia, Squamata, Leiosauridae, Urostrophus vautieri Duméril and Bribon, 1837: distribution extension, new state record, and geographic distribution map

Check List ◽  
2010 ◽  
Vol 6 (3) ◽  
pp. 432
Author(s):  
João Luiz Gasparini ◽  
Diogo Andrade Koski ◽  
Pedro L.V. Peloso
Keyword(s):  
Geographic Distribution ◽  
Rio De Janeiro ◽  
Rio Grande ◽  
First Record ◽  
Minas Gerais ◽  
The State ◽  
Rio Grande Do Sul ◽  
Distribution Map ◽  
Santa Catarina ◽  
The North

We present the first record of Urostrophus vautieri for the state of Espírito Santo and a distribution map for the species. This species was previoulsy known from the states of Minas Gerais, Rio de Janeiro, São Paulo, Paraná, Santa Catarina, and Rio Grande do Sul. The present record represent an extension of nearly 200 km to the North from the nearest published record for the species.

Characterization of Natural Slip Materials Geologically Found in the North of the State of Rio de Janeiro, Brazil

2014 ◽  
Vol 798-799 ◽  
pp. 33-38
Author(s):  
Zélia Maria Peixoto Chrispim ◽  
Maria da Gloria Alves ◽  
Luciana Lezira Pereira de Almeida ◽  
Jonas Alexandre ◽  
Afonso Rangel Garcez de Azevedo ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Rio De Janeiro ◽  
Ceramic Industry ◽  
Particle Size Analysis ◽  
The State ◽  
Size Analysis ◽  
X Ray ◽  
Geological Materials ◽  
The North

Slip is a semifluid clayey type of material used in the ceramic industry for coating earthware products, such as bricks and tiles, thus providing distinct surface colors or patterns. In the present work a characterization was conducted to identify the mineralogical as well the chemical and physical properties of geological materials existing in the slip used by industries in the north region of the state of Rio de Janeiro, Brazil. The basic natural materials composing a slip, namely clay and kaolin, are responsible for changes not only the slip plasticity but also in its viscosity and adhesion to the surface of the ceramic piece. The slip characterization was performed in terms of particle size analysis, Atterberg limits and actual grain density. The chemical composition was obtained by X-ray fluorescence and the thermal properties by differential thermal analysis. The results indicated that marked differences exist between slip from distinct origins. A few slip samples failed to present the required properties.

Properties of High Temperature Sintered Clay Ceramic Added with Multi-Wire Sawn Granite Waste

2014 ◽  
Vol 775-776 ◽  
pp. 69-74 ◽  
Author(s):  
Monica Castoldi Borlini Gadioli ◽  
Mariane Costalonga de Aguiar ◽  
Carlos Maurício Fontes Vieira ◽  
Verônica Scarpini Candido ◽  
Sérgio Neves Monteiro
Keyword(s):  
High Temperature ◽  
Melting Point ◽  
Flexural Strength ◽  
Water Absorption ◽  
Linear Shrinkage ◽  
Huge Amount ◽  
Ornamental Stones ◽  
The World ◽  
Alkaline Oxides

Brazil is currently one of the world leading producers and exporters of ornamental stones. The increasing production also generates a proportionally huge amount of wastes. Depending on stones such as granite, these wastes may be composed of relatively high content of alkaline oxides. This is a low melting point flux with advantage for a potential addition of the waste into common clay ceramic. Thus, the present work investigated the addition of a granite waste, generated during the sawing stage using the multi-wire technology, into clayey ceramics fired at 1200oC. This ceramic added with up to 30 wt% waste were evaluated in terms of linear shrinkage, water absorption and flexural strength. It was found that the waste fluxing compounds promoted a reduction in water absorption and increase in strength that are associated with an improved clayey ceramic.

Influence of the Granite Waste into a Clayey Ceramic Body for Rustic Wall Tiles

2012 ◽  
Vol 727-728 ◽  
pp. 1057-1062 ◽  
Author(s):  
Monica Castoldi Borlini Gadioli ◽  
Mariane Costalonga de Aguiar ◽  
Abiliane de Andrade Pazeto ◽  
Sérgio Neves Monteiro ◽  
Carlos Maurício Fontes Vieira
Keyword(s):  
Mechanical Strength ◽  
Water Absorption ◽  
Raw Materials ◽  
Rupture Strength ◽  
Ceramic Body ◽  
Linear Shrinkage ◽  
Ceramic Production ◽  
Ornamental Stones ◽  
Error Bar ◽  
Press Molding

This work has as its objective to evaluate the influence of a granite waste into a clayey ceramic body for obtaining of rustic wall tiles. As raw materials, a clayey ceramic body for red ceramic production and a granite waste, resulting from ornamental stones cutting with the multi-wire technology were used. Compositions using 0, 10, 20 and 30% of waste incorporated into ceramic body were prepared. Specimens were fabricated by uniaxial press-molding at 20 MPa and sintered at 1050°C. The following properties were determined: linear shrinkage, water absorption and flexural rupture strength. In general, within the error bar, there was no influence of the waste in the values of water absorption of the clayey ceramic body. The results showed that all investigated formulations used in this work for the production of rustic wall tiles attend the standards for water absorption and mechanical strength.

scholarly journals Spatial-temporal of fire foci in the state of Rio de Janeiro, Brazil

2020 ◽  
Vol 36 (3) ◽  
Author(s):  
Givanildo de Gois ◽  
Welington Kiffer de Freitas ◽  
José Francisco de Oliveira Júnior
Keyword(s):  
Rio De Janeiro ◽  
Coastal Region ◽  
The State ◽  
Time Variability ◽  
Software Environment ◽  
Multivariate Statistical ◽  
Homogeneous Groups ◽  
Mountain Ranges ◽  
The North ◽  
South Central

This study evaluated the space-time variability of fire foci via environmental satellites for the State of Rio de Janeiro (SRJ) based on statistical procedures. The fire foci in the period of 2000 to 2015 were obtained from the BDQueimadas fire database. Descriptive, exploratory, and multivariate statistical analyses were performed in the software environment R i386 version 3.2.5. The north region had 6760 foci (21.11%), the south-central region had 3020 foci (9.43%), the Middle Paraíba had 6,352 foci (19.84%), the Metropolitan areas had 6671 foci (20.83%), and the Green Coast region had 292 foci (0.91%). The cluster analysis identified three homogeneous groups of fire foci (G1, G2, and G3) but did not include the municipality of Campos dos Goytacazes (NA). The G1 group (6.21 ± 0.01 foci, 57.61%) included areas throughout the state and covered the coastal region and lowlands towards the north. The G2 group (6.21 ± 0.01 foci, 34.81%) included the northern, south-central, and coastal shallows regions. The G3 group (6.21 ± 0.01 foci, 9.78%) included the mountain ranges of the state. Environmental characteristics and socioeconomic are crucial in the dynamics of fire foci in Rio de Janeiro.

scholarly journals Considerações sobre estromatólito do tipo domal da Lagoa Salgada, Estado do Rio de Janeiro, Brasil

2007 ◽  
Vol 30 (1) ◽  
pp. 50-57
Author(s):  
Loreine Hermida Silva e Silva ◽  
Anderson Andrade Cavalcanti Iespa ◽  
Cynthia Moreira Damazio-Iespa
Keyword(s):  
Rio De Janeiro ◽  
The State ◽  
North Coast ◽  
Carbonate Precipitation ◽  
Mollusk Shells ◽  
The Third ◽  
The North ◽  
Internal Morphology

The lagoa Salgada is situated on the north coast of the State of Rio de Janeiro, between the districts of Campos dos Goytacazes and São João da Barra, at 41º00'30'' W and 21º54'10''S. In the margins of the lagoon the presence of recent stromatolitic constructions was verified. The stromatolite may be defined as lithified biosedimentary structure, growing through the increase of sediment blade trapping by the carbonate precipitation as result of microbian organism activity. The objective of this study was to describe and to determine the internal morphology of domal type stromatolite of the lagoa Salgada. Through cutting, three different stages were observed: the first (base) is present as a thrombolitic stage with spread blade; the second (intermediary) is a thrombolitic-stromatolitic stage with spread and continuous blade; the third (top) is stromatolitic and the most recent stage of the structure, presenting continuous blade and with interruptions rare. Besides the presence of cyanobacteria and mollusk shells, were observed also internee palinomorphs inside the domal stromatolite. It was possible to observe that filament cyanobacteria contributed to the formation of blade of domal stromatolite and the microgastropod contributed for the destruction of the blade.

scholarly journals Relato de experiência: oficina pedagógica como objeto de aprendizagem na formação inicial do pedagogo no Consórcio CEDERJ

2018 ◽  
Vol 11 (3) ◽  
pp. 176-191 ◽  
Author(s):  
Silvia Alicia Martínez ◽  
Fabrícia Vieira de Araújo ◽  
Suelen Ribeiro de Souza ◽  
Evandro Vargas ◽  
Leandro Garcia Pinho
Keyword(s):  
Distance Education ◽  
Rio De Janeiro ◽  
Teaching And Learning ◽  
The State ◽  
Pedagogical Practices ◽  
Initial Moment ◽  
State University ◽  
Pedagogical Workshop ◽  
History Teaching ◽  
The North

RESUMO: O presente trabalho objetiva abordar, analisar e discutir uma significativa experiência de ensino e aprendizagem adquirida em uma oficina pedagógica, no âmbito do Curso de Pedagogia da Universidade Estadual do Norte Fluminense (UENF), no bojo do Centro de Educação a Distância do Estado do Rio de Janeiro (CEDERJ). Tal atividade foi concretizada por professores, tutores e alunos das disciplinas História na Educação 1 e História na Educação 2 do curso supracitado. A partir das referências de diferentes pesquisadores do campo do Ensino de História e da Educação, discorremos em um momento inicial acerca da organização e estruturação da Oficina, para posteriormente tratarmos da concretização da atividade em si pelos estudantes. A Oficina muito contribuiu para a reflexão acerca das práticas pedagógicas e para uma maior aproximação entre docentes, tutores e estudantes, bem como oportunizou pensamentos acerca das diferentes tecnologias e outros materiais que podem ser empregadas no ensino de História. PALAVRAS-CHAVE: oficina pedagógica; ensino de História; educação a distância; curso de Pedagogia. ABSTRACT: The present work aims at addressing, analyzing and discussing a significant experience of teaching and learning acquired in a pedagogical workshop, within the course of pedagogy of the State University of the North Fluminense (UENF), in the Centre of Distance Education of the State of Rio de Janeiro (CEDERJ). Such activity was accomplished by teachers, tutors and students of the disciplines History in Education 1 and History in Education 2 of the aforementioned course. From the references of different researchers of the field of History Teaching and Education, we have come at an initial moment about the organization and structuring of the workshop, to subsequently embrace the realization of the activity itself by the students. The workshop contributed greatly to reflect on pedagogical practices and for a closer approximation among teachers, tutors and students, as well as it allowed to think the different technologies and other materials that can be employed in the History teaching. KEYWORDS: Pedagogical workshop; History teaching; distance education; Pedagogy course.

scholarly journals Decommissioning Plans for Fixed Offshore Platforms: A Brief Revision

2021 ◽  
Vol 9 (3) ◽  
Author(s):  
Marcio Soares Pinheiro ◽  
Paulo Roberto Duailibe Monteiro
Keyword(s):  
North Sea ◽  
Rio De Janeiro ◽  
The State ◽  
Oil Field ◽  
Offshore Platforms ◽  
The North ◽  
Campos Basin ◽  
Heavy Lift ◽  
Long Time ◽  
The North Sea

Brazil began to explore its seas in the 60’s of the XX Century looking for petroleum. This journey began in the Northeast and the first oil field produced offshore was the Guaricema Field, in the State of Sergipe. During the 70’s, Petrobrás found oil in the Campos Basin, between the States of Espírito Santo and Rio de Janeiro, that became the most important oil province in Brazil until the discovery of the Pre-Salt province, in the Santos Basin. As these fields are producing for a long time, many of them are already completely depleted or their production is in way of to be not commercial anymore, and their facilities need to be decommissioned. This review of decommissioning practices of fixed offshore platforms carried out worldwide has focus on the removal of topside with special vessels designed for this purpose or with conventional methods (crane vessels + barge). It will show the benefits of using specialised heavy lift vessels to remove the topsides and move it to shore for dismantling / recycling / reuse / disposal. The cases for study were the successful decommissioning projects in the North Sea: Brent B/D, Valhall QP, Viking, Curlew, Eider A, Golden Eye and Leman, Iwaki-Oki, Halfweg Q1, Yme and Ninian North.

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