Ceramic Blocks
Mostrando 25-36 de 62 artigos, teses e dissertações.
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25. Especificação, execução e controle de alvenaria estrutural em blocos cerâmicos de acordo com a NBR 15812
Este trabalho trata da especificação, execução e controle de obras em alvenaria estrutural de blocos cerâmicos conforme a NBR 15812 (ABNT, 2010). Na etapa de especificação foi avaliada, através de ensaios, a resistência à compressão de argamassas, blocos, grautes, prismas e paredes, constituídos por diversas combinações, concluindo, para os mat
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/12/2011
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26. Análise de sistemas de fixação resinosos : por meio de nanoinfiltração, microdureza e microcisalhamento / Analisys of resin luting systems through nanoleakage
During the cementing indirect restorations procedure using resin luting systems, polymerization is essential for an effective clinical outcome of success. The aim of this in vitro study was to evaluate the Knoop hardness (KHN), microshear bond strength (MSBS) and nanoleakage pattern of resin cements and flowable resin to dental enamel. Ninety-two enamel bovi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/03/2011
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27. Bond strength of three luting agents to zirconia ceramic - influence of surface treatment and thermocycling
OBJECTIVE: This in vitro study aimed to evaluate the influence of different surface treatments, 3 luting agents and thermocycling on microtensile bond strength (µTBS) to zirconia ceramic. Material and METHODS: A total of 18 blocks (5x5x4 mm) were fabricated from zirconia ceramic (ICE Zirkonia) and duplicated into composite blocks (Alphadent). Ceramic blocks
J. Appl. Oral Sci.. Publicado em: 01/07/2011
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28. Comparação entre blocos cerâmicos e em concreto, quanto a custo e produtividade, quando utilizados em alvenaria estrutural / Comparison between ceramic blocks and concrete blocks relatively to cost and productivity, when used in structural masonry
A alvenaria estrutural é um dos mais antigos sistemas de construção. Com a revolução industrial e o avanço de novas técnicas construtivas foi perdendo espaço na construção civil para as soluções em concreto armado e em aço. No início do século XX, buscando novas alternativas de construção, alguns países mais desenvolvidos começaram a demon
Publicado em: 2011
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29. A influência do corte com diferentes discos e velocidades na integridade dos espécimes e na resistência adesiva de uma cerâmica a um cimento resinoso dual em ensaio de microtração / The influence of different cutting speeds and brand of diamond saws on integrity of microtensile specimes and Bond strenght values
The aim of this research was to verify the influence of different cutting speeds and brand of diamond saws during microtensile specimen preparation on the bonding strength values and on the samples microscopy integrity (SEM). Twenty lithium disilicate glass-ceramic blocks (IPS e.max Press) were bonded with dual-cure resin cement (Rely X ARCTM) to composite (
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/11/2010
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30. Performance of carbide and ceramic tools in the milling of compact graphite iron - CGI
Grey cast iron (GCI) is the most common material used in diesel engine blocks. However, to increase the pressures in the combustion chamber when this kind of alloy is used, it is necessary to increase the block wall thickness, what raises its weight and, consequently, does not fulfill the requirements. Thus, the compacted graphite iron (CGI) appears as an al
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2010-12
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31. Avaliação da resistência de união de um cimento resinoso a um filme vitrocerâmico depositado em superfície de Y-TZP / Evaluation of bond strength of a resin cement to ceramic film deposited on a surface Y-TZP
The use of Y-TZP for dental ceramics strengthening has expanded significantly its mechanical properties, allowing its use in various clinical situations such as intraradicular, crowns, fixed partial dentures and implants. With the development of these new ceramic systems the use of traditional methods for surface treatment have been observed to be ineffectiv
Publicado em: 2010
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32. Adição de cascalho de perfuração da bacia potiguar em argilas para uso em materiais cerâmicos: influência da concentração e temperatura de queima.
One of waste produced on large scale during the well drilling is the gravel drilling. There are techniques for the treatment of the same, but there isnt consensus on what are the best in terms of economic and environmental. One alternative for disposal of this waste and objective of this paper is the incorporation and immobilization of gravel clay matrix to
Publicado em: 2010
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33. ESTUDO DO COMPORTAMENTO MECÂNICO DE BLOCOS CERÂMICOS COM DIFERENTES LARGURAS / STUDY OF THE MECHANICAL BEHAVIOR CERAMIC BLOCKS OF DIFFERENT THICKNESS
The main goal of this project is comparing the performance of structural ceramic blocks with 11,5 (Block A) e 14 (Block B) centimeters thickness, through tests with blocks, prisms and small walls using two types of mortar, ii and iii, determined by the British Norm (BS-5628) developed in laboratory. The experimental program includes simple axial units compre
Publicado em: 2009
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34. Desenvolvimento de bloco de vedação com barita na composição de partida para blindagem de radiação X
This work main objective is to study the use of bricks in barium X-rays rooms in order to contribute to the optimization of shielding rooms diagnosis. The work was based on experimental measurements of X-ray attenuation (40 to 150 kV), using ceramic seal bearing the incorporation of barium sulfat (BaSO4). Different formulations were studied in three differen
Publicado em: 2009
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35. Influência da gipsita no surgimento de eflorescência em telhas cerâmicas
The red ceramic industry is recognized as of major importance in Piauí State. The State capital, Teresina, is the greatest producer of this material ( production about 18 million peaces), which is used mainly for masonry sealing blocks. One of the most frequent problems in this kind of products is the efflorescence. This work has the main objective of study
Publicado em: 2009
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36. Uma contribuição a melhoria do processo de fresamento de ferro fundido vermicular - CGI / A contribution to the improvement of the milling process machining compacted graphite iron - CGI
Since the beginning of this century, researches about the development of diesel engines have been intensified, aiming to increase its energy efficiency and to reduce the levels of emission of pollutants. One the way to increase this efficiency is to increase the peaks of pressure of fuel explosion in the combustion chamber. The grey casting iron material is
Publicado em: 2009