Traction Strength
Mostrando 13-24 de 33 artigos, teses e dissertações.
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13. Previsão das propriedades físicas do papel kraft por espectroscopia no infravermelho próximo (NIR) e regressão por mínimos quadrados parciais (PLS)
The main objective of the present work is represented by the characterization of the physical properties of industrial kraft paper (i.e. transversal and longitudinal tear resistance, transversal traction resistance, bursting or crack resistance, longitudinal and transversal compression resistance (SCT (Compressive Strength Tester) and compression resistance
Química Nova. Publicado em: 2009
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14. Estudo da propriedade resistência superficial em revestimentos de argamassa / Study of surface strength property of mortar rendering
The lack of cohesion in mortar renderings corresponds to the loss of mechanical strength among theirs layers due to the weakening of particles bond, a fact which is reflected, among other events, by a low surface resistance of these renderings. Thus, poor surface strength of mortar renderings accelerates their degradation process, leading to a significant re
Publicado em: 2009
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15. Análise de propriedades térmicas e mecânicas de compósitos de argamassa e resíduo de borracha
Although already to exist alternative technique and economically viable for destination of used tires, quantitative data on properties of constructive elements that use the rubber waste as aggregate still are restricted. In the present work, the waste proceeding from industry of retreading as material for manufacture of composite destined to the production o
Publicado em: 2009
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16. Evaluation of shrinkage and creep of self-compacting concrete for application in precast elements / Avaliação de retração e fluencias do concreto auto-adensavel para aplicação em elementos pre-moldados
This project analyzed, theoretically and experimentally, the mechanical and rheological behavior of the selfcompacting concrete (C.A.A.), specially its features according to slow deformation, shrinkage and creep, and its applicability in precast elements. Two compositions of concrete of different classes of resistance were developed, 35 MPa and 55 MPa. In th
Publicado em: 2009
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17. EFEITOS NAS PROPRIEDADES MECÂNICAS, ELÁSTICAS E DE DEFORMAÇÃO EM CONCRETOS COM ALTOS TEORES DE ESCÓRIA E CINZA VOLANTE. / EFFECTS ON MECHANICAL, ELASTIC AND DEFORMATION PROPERTIES ON CONCRETE WITH HIGH LEVELS OF SLAG AND FLY ASH.
The use of byproducts and industrial waste as pozzolanic, is an alternative to achieve the sustainability, economy and durability in concrete structures. This survey has as its purpose to analyze the effect on mechanical, elastic and deformation properties on concrete with a high level of granulated slag from blast furnace and fly ash in place of Portland bu
Publicado em: 2009
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18. Acompanhamento de recuperaÃÃo estrutural de pavimento urbano de concreto e anÃlise dos materiais empregados
Recife, capital pernambucana, possui 21 (vinte e uma) avenidas pavimentadas em concreto, perfazendo um total de cerca de 1.500.000,00 m (um milhÃo e quinhentos mil metros quadrados). Uma das primeiras avenidas a ser pavimentada em concreto, a Avenida Conde da Boa Vista, antiga Rua Formosa, foi construÃda na administraÃÃo do prefeito PelÃpidas Silveira
Publicado em: 2009
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19. Effects of physical exercise on the sleep of the patients with chronic primary insomnia. / Efeitos do exercício físico no sono de pacientes com insônia crônica primária
Some evidences suggest that physical exercise can improve sleep quality of insomniac patients. The aim of this study was to evaluate and compare the acute effect of three modalities of physical exercise in anxiety state and in the sleep quality in insomnia patients. Thirty-six patients (8 men and 28 women) with primary chronic insomnia (mean age 44,4 8) were
Publicado em: 2008
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20. UTILIZAÇÃO DE RESÍDUO DE LÃ DE VIDRO EM FABRICAÇÃO DE CONCRETO
The waste generation in industrial processes is mostly unavoidable. The glass wool, greatly used in mineral-metallurgical activities, loses its thermal insulating features turning into an industrial waste due to work conditions. The prime goal of this work is to research the use of industrial waste of glass wool, though the incorporation in concrete matrix,
Publicado em: 2007
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21. Potencial de aproveitamento de resíduos de caulim paraibano para o desenvolvimento de argamassas de múltuplo uso. / Potential use of waste kaolin Paraiba for the development of multiple-use mortars.
In Paraíba, the industry of the kaolin, an activity of great importance to the State and local producers, generating large amounts of waste that is landfilled, impacting the environment. The National Council on the Environment (CONAMA) has been made responsible for waste management to their generators. This residue does not have recycling technology known d
Publicado em: 2007
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22. Caracterização tecnológica de rochas ornamentais / Technological characterization of dimension stones
With the increasing use of the rocks as dimension stones, the necessity of an adequate technological characterization of these materials becomes necessary. This work presents the results of a technological characterization of eighteen Brazilian rock types commonly used as dimension stones. The test were carried out according to Brazilian and American standar
Publicado em: 2006
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23. Avaliação dos métodos semi-empíricos para análise de dutos corroídos subsidiado pelo método dos elementos finitos
With the expansion of pipelines mesh through all the country, researches that ensure the security and durability of these installations are essential. The present research presents and compares some techniques of computational modeling applied to pipelines with corrosion defects for the analyses of its residual strength. Shell finite elements were utilized f
Publicado em: 2006
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24. EFEITO DO NAOCL A 10% E DA APLICAÇÃO DO COMPÓSITO DE BAIXA VISCOSIDADE SOBRE A RESISTÊNCIA DA UNIÃO COMPÓSITO-DENTINA / EFFECT OF NAOCL 10% AND THE APPLICATION OF LOW-VISCOSITY COMPOSITE ON RESIN/DENTIN BOND STRENGTH
The aim of this in vitro study was to evaluate the effect of NaOCl 10% as dentin superficial treatment and the application of a low-viscosity composite (LVC) on resin/dentin bond strength. Twenty human third molars, recently extracted, were divided in four experimental groups. The occlusal enamel was removed with a mechanical grinder perpendicular to the lon
Publicado em: 2006