Polypropylene Fibres
Mostrando 1-8 de 8 artigos, teses e dissertações.
-
1. Tensile Behaviour and Durability Issues of Engineered Cementitious Composites with Rice Husk Ash
ABSTRACT The Engineered Cementitious Composites (ECC) is a special type of High Performance Fibre Reinforced Cementitious Composite (HPFRCC) characterized by a high tensile ductility with a 2% maximum volume of micro fibres. ECC has a tensile strain-hardening performance that leads to multiple cracking behaviour, thus providing the high ductility to the conc
Matéria (Rio J.). Publicado em: 20/07/2017
-
2. Comportamento de hidratação e resposta cisalhante cíclica de resíduo de mineração cimentado reforçado com fibras
As propriedades do solo cotidianamente podem não ser adequadas às características e às necessidades de projeto. É apresentada, como alternativa, a técnica de reforço com inclusão de elementos fibrosos à matriz de solo cimentado e não cimentado. Ainda, embora comuns, o comportamento do solo frente a solicitações cíclicas não é completamente con
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
-
3. Sisal organosolv pulp as reinforcement for cement based composites
The present work describes non-conventional sisal (Agave sisalana) chemical (organosolv) pulp from residues of cordage as reinforcement to cement based materials. Sisal organosolv pulp was produced in a 1:1 ethanol/water mixture and post chemically and physically characterized in order to compare its properties with sisal kraft pulp. Cement based composites
Materials Research. Publicado em: 2009-09
-
4. Preparation and characterization of mono-component two-phase system (SBM) by oxypropylation reaction of cellulose fibres and starch / Preparação e caracterização de sistema bifásico mono-componente (SBM) a partir da reação de oxipropilação de fibras celulósicas e amido
Chemical modifications were applied to cellulosic materials and starch with the objective to obtain products with an external thermoplastic layer while preserving the inner part of these substrates. The final products should behave as composite materials where the unmodified inner part is the reinforcement agent and the thermoplastic layer the matrix. The mo
Publicado em: 2007
-
5. Argamassas com adição de fibras de polipropileno -estudo do comportamento reológico e mecânico. / Mortars with polypropylene fibres´addition - study of the rheological and mechanical behavior.
Many designers and constructors have been looking for alternative solutions trying to avoid types of anomalies in the mortar rendering. One of these solutions is the application of mortar with fibres addition. However, the knowledge concerning the composite behavior is very empirical, mainly in Brazil where there are no systematic researches about this sub
Publicado em: 2006
-
6. Aspectos produtivos e análise do desempenho do fibrocimento sem amianto no desenvolvimento de tecnologia para telhas onduladas / Productive aspects and performance of fibrecement without asbestos in the development of technology for undulate roofing tiles
Estudos anteriores utilizando matriz cimentícia reforçada exclusivamente com fibras vegetais propiciaram a produção de telhas com desempenho aceitável nas idades iniciais. Porém, com o envelhecimento natural, as telhas apresentaram significativa redução do desempenho mecânico, fato este atribuído principalmente ao ataque alcalino da matriz cimentí
Publicado em: 2006
-
7. ANÁLISE EXPERIMENTAL DE VIGAS ARMADAS DE CONCRETO DE ALTO DESEMPENHO COM DIFERENTES TIPOS DE FIBRAS / EXPERIMENTAL ANALYSIS OF HIGH STRENGTH CONCRETE BEAMS REINFORCED WITH DIFFERENT FIBRES
The future is directed to an increasing use of high performance concrete reinforced with fibers. The former due to its improved durability and strength, and the latter due to its ability to give ductility and tenacity to such a fragile product. Recently reviewed draft of the NBR 6118, called new NB1, was published. New constitutive laws for concrete and desi
Publicado em: 2001
-
8. Fibrogenic effect of wollastonite compared with asbestos dust and dusts containing quartz.
The distribution of length and diameter and the aspect ratio of crocidolite asbestos, a mineral substitute for asbestos (wollastonite), a manmade mineral fibre (glass wool), and synthetic fibres (polypropylene and polyacrylonitrite) were determined by light microscopy with phase contrast and, for crocidolite, also with transmission electron microscopy. The s