Building Materials
Mostrando 25-36 de 255 artigos, teses e dissertações.
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25. Effect of wood particle treatment on the properties of gypsum plaster pastes and composites
ABSTRACT In this work the performance of gypsum plaster and wood particle in pastes and composites was investigated. Wood particles of fineness 0.42 mm and 1.20 mm were employed. Natural wood particles and the treated ones in cold or hot water (80 °C) were performed. The effects of the extractives solutions from the treatments applied to the wood particles
Matéria (Rio J.). Publicado em: 2016-12
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26. Two-part silicone mold. A new tool for flexible ureteroscopy surgical training
ABSTRACT Introduction and objectives: Flexible ureteroscopy is a common procedure nowadays. Most of the training programs use virtual reality simulators. The aim of this study was to standardize the building of a three-dimensional silicone mold (cavity) of the collecting system, on the basis of polyester resin endocasts, which can be used in surgical traini
Int. braz j urol.. Publicado em: 2016-08
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27. Cardanol-based thermoset plastic reinforced by sponge gourd fibers (Luffa cylindrica)
Abstract A growing global trend for maximum use of natural resources through new processes and products has enhanced studies and exploration of renewable natural materials. In this study, cardanol, a component of the cashew nut shell liquid (CNSL), was used as a building block for the development of a thermosetting matrix, which was reinforced by raw and mod
Polímeros. Publicado em: 04/03/2016
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28. The Bond Strength Behavior of Polymer-modified Mortars During a Wetting and Drying Process
Polymer-modified mortars are highly popular for setting exterior tile systems and low-porosity ceramic tiles because they possess greater flexibility and higher bond strengths than conventional mortars which increases cladding serviceability. However, the long-term performance of this application is not completely understood and many pathologies has been rep
Mat. Res.. Publicado em: 24/11/2015
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29. Geopolymer/PEG Hybrid Materials Synthesis and Investigation of the Polymer Influence on Microstructure and Mechanical Behavior
Geopolymers are aluminosilicate inorganic polymers, obtained from the alkali activation of powders containing SiO2+Al2O3>80wt%, mainly proposed as environmentally friendly building materials. In this work, metakaolin-based geopolymers have been prepared and a water-soluble polymer, polyethylene glycol (PEG), has been added in different percentages to obtain
Mat. Res.. Publicado em: 25/08/2015
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30. Mechanical properties of recycled Kraft paper residue polyester composites
Construction industry has a significant grow in the past few years. Following that rate, the amount of residue produced from that growth also increases. The need to find alternatives apart from disposing that residue in landfills have led researchers to find new materials from disposal residues. In this paper, kraft paper from cement bags used in building co
Mat. Res.. Publicado em: 13/06/2014
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31. Direct-write assembly of 3D scaffolds using colloidal calcium phosphates inks
Additive manufacture techniques using concentrated colloidal inks are a promising approach for creating three-dimensional (3D) calcium phosphates scaffolds for bone repair and regeneration. Among those, the direct-write assembly allows building scaffolds with precise size and geometry. In the present work, commercial β-TCP and HA were used to produce two t
Matéria (Rio J.). Publicado em: 2014-03
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32. Microwave-assisted extraction combined with HPLC-MS/MS for diagnosis of fungal contamination in building materials
Ergosterol foi usado como indicador de contaminação fúngica para avaliar a presença de mofo em materiais de construção. Saponificação assistida por radiação micro-ondas seguida por extração com pentano foi utilizada na etapa de preparo de amostra. Analisaram-se amostras de tijolo, gesso, cimento e granito por cromatografia líquida de alta efici�
J. Braz. Chem. Soc.. Publicado em: 2013-09
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33. Properties of recycled high density polyethylene and coffee dregs composites
Composites of recycled high density polyethylene (HDPE-R) and coffee dregs (COFD) were elaborated. The blends were made at the proportions of 100-0, 90-10, 80-20, 70-30, 60-40, 50-50 and 40-60% polymer-filler ratio. The materials were evaluated through scanning electron microscopy (SEM), differential scanning calorimetry (DSC), thermogravimetry/derivative th
Polímeros. Publicado em: 2013
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34. Concreto ultraleve® estrutural com pérolas de EPS: caracterização do material e estudo de sua aplicação em lajes / Structural ultra lightweight concrete with EPS beads: material characterization and study of its use in slabs
The use of lightweight concrete is mainly due to the benefits provided by reducing the density of the material such as smaller efforts on structures, economy of molds and scaffolding, as well as lower costs of transportation and erection of precast constructions. Currently, besides the technical and economic issues, the choice of building materials should ta
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/10/2012
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35. A adoção de sistemas de avaliação ambiental de edifícios (LEED e Processo AQUA) no Brasil: motivações, benefícios e dificuldades / The adoption of environmental assessment systems of buildings (LEED e Process AQUA) in Brazil: motivations, benefits e difficulties
The building environmental assessment systems over the world are employing increasingly and we can find several studies concerning this subject. Many authors and websites emphasize the benefits of LEED and Process AQUA, but few discuss quantitatively the impacts, difficulties and reasons for its adoption, showing thus the need and importance of research like
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/08/2012
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36. Análise numérica de painéis pré-moldados de fechamento em edificações de pequena altura / Numerical analysis of precast panels in small height buildings
Abstract: The civil construction has intensified efforts in the search and implementation of strategies for the modernization of the sector, in which the rationalization of constructive processes has a crucial role. The most notable trends are related to employment of systems, wholly or partly pre-fabricated, able to maximize the potential of rationalization
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/06/2012