Styrene Butadiene Latex
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Influence of surface roughness and the use of new types of fiber in bearing pads of cement-based material for precast concrete connections / Influência da rugosidade superficial e o uso de novos tipos de fibras em almofadas de argamassa para ligações de concreto pré-moldado
This paper presents the study of a mortar modified to be used as a bearing pad connections between precast concrete elements. This mortar is composed of cement and sand, with the addition of styrene-butadiene latex (SB), lightweight aggregate (vermiculite) and short fibers (polypropylene, glass and PVA). Previous research showed that this composite presents
Publicado em: 2010
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2. Effect of silica fume and SBR latex on the pasteaggregate interfacial transition zone
This paper deals with the effect of silica fume and styrene-butadiene latex (SBR) on the microstructure of the interfacial transition zone (ITZ) between Portland cement paste and aggregates (basalt). Scanning Electron Microscope (SEM) equipped with energy dispersive x ray analysis system (EDX) was used to determine the ITZ thickness. In the plain concrete a
Materials Research. Publicado em: 2007-03
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3. Almofada de apoio de compósito de cimento para ligações em concreto pré-moldado / Bearing pad of cement composite for connections in precast concrete
This research presents a study of a mortar modified to use as bearing pad between precast concrete elements. The mortar used in this research is achieved by the introduction of styrene-butadiene latex (SB) and polypropylene fibers into a cement mortar and sand, modifying their mechanical properties, as increase of the potential deformation by decrease of the
Publicado em: 2007
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4. Mathematical modeling and experimental study of styrene - butadiene emulsion copolymerization. / Modelagem matemática e estudo experimental da copolimerização de estireno e butadieno em emulsão.
Neste trabalho, estudos da copolimerização em emulsão de estireno e butadieno foram realizados em duas etapas. A primeira etapa consistiu na obtenção de um modelo matemático que representasse os processos em batelada e em semicontínuo através das principais variáveis do processo. Na segunda etapa, o efeito de diversas variáveis importantes ao proce
Publicado em: 2006
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5. High performance latex-modified lightweight aggregate concrete for thin precast components - dosage, production, properties and microstructure / "Concreto leve de alto desempenho modificado com SB para pré-fabricados esbeltos - dosagem, produção, propriedades e microestrutura"
This dissertation deals with the application of the high performance lightweight aggregate concrete (HPLWAC) for the production of thin precast components, such as structural and insulation panels and elements for covering. A concrete with special properties was presented, once the use of styrene-butadiene latex (SBR), silica fume, accelerating superplastifi
Publicado em: 2003
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6. Behavior of conventional glass fibers in matrix of Portland cement modified with latex and with the addition of silica fume. / Comportamento das fibras de vidro convencionais em matriz de cimento Portland modificada com látex e adição de sílica ativa.
Portland cement mortar and concrete are durable building materials, relatively cheap and, despite they display a good rigidity and an adequate compressive strength, they have other deficient properties such as tensile strength, impact, fatigue, beyond low toughness and ductility. A considerable improvement of these properties can be obtained adding fibers, i
Publicado em: 2002