Special Portland Cement
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Análise Acústica de Fachadas de Light Steel Frame e Placas Cimentícias
RESUMO A construção a seco tem sido considerada uma alternativa tecnológica aos sistemas construtivos convencionais e, no Brasil, sistemas como o Light Steel Frame e Drywall passaram a ser empregados em maior escala nos últimos anos. Basicamente, estes sistemas consistem em painéis estruturados por perfis de aço, preenchidos internamente por uma lã de
Matéria (Rio J.). Publicado em: 10/06/2019
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2. Concreto celular polimérico: influência na adição de resíduo de poliéster insaturado termofixo
This work addresses the production of lightweight concrete building elements, such as plates, prefabricated slabs for pre-molded and panels of fencing, presenting a singular concrete: the Lightweight Concrete, with special properties such low density and good strength, by means of the joint use of industrial waste of thermosetting unsaturated polyesters and
Publicado em: 2009
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3. Chaotropic substances and their effects on the mechanical strength of Portland cement-based materials
Portland cement-based materials are present in our everyday life. Over the last two decades, important developments have been made to improve their mechanical strength, mainly through microstructural design. In addition, another promising parameter still remains in the early stages of understanding: that of adhesion. Recently, interdisciplinary researchers h
Materials Research. Publicado em: 2008-06
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4. Adição de superplastificante e anti-segregante à base de CMC em pastas de cimento para Poços de Petróleo
Oil well cementing materials consist of slurries of Special class Portland cement dispersed in water. Admixtures can be used to provide the necessary fluidity, so the material can be efficiently pumped down as well as penetrate porous rocks with controlled filter loss. Construction admixtures can be used to modify the properties of oil well cements provided
Publicado em: 2008
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5. Compósitos Portland-biopolímeros para cimentação de poços de petróleo
The oil production in mature areas can be improved by advanced recovery techniques. In special, steam injection reduces the viscosity of heavy oils, thus improving its flow to surrounding wells. On the other hand, the usually high temperatures and pressures involved in the process may lead to cement cracking, negatively affecting both the mechanical stabilit
Publicado em: 2006
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6. Avaliação do comportamento reológico de pastas de cimento para poços de petróleo com adição de plastificantes
The isolation of adjacent zones encountered during oilwell drilling is carried out by Portland-based cement slurries. The slurries are pumped into the annular positions between the well and the casing. Their rheological behavior is a very important component for the cementing process. Nowadays, several alternative materials are used in oilwell cementing, wit
Publicado em: 2006
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7. Study of reduction in self-reducing pellet of chromites. / Estudo da redução de pelotas auto-redutoras de cromita.
The reduction behaviors, at high temperature, of the self-reducing pellets of chromites for production of high carbon ferro-chromium are studied in this work. The influences of the temperature, of the excess of reductant and the small addition of the Fe-Si were analyzed. The materials used (chromites, petroleum coke, Portland cement, hydrated lime and silica
Publicado em: 2006
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8. Influência do C3A em pastas de cimento portland : avaliação das propriedade reológicas / Influence of C3A on portland cement pastes : valuation of the rheologic properties
The production of high performance concrete with special rheologic properties, fluidity and durability, demands the knowledge of physical and chemical characteristics of the used cement. The herein research studies the C3A influence on cement pastes, in order to add knowledge to all the aspects that can contribute to its rheologic behavior and, consequently,
Publicado em: 2004