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Performance assessment of waste fibre-reinforced mortar
Gonilho-Pereira, Cristiana; Faria, Paulina; Fangueiro, Raul; Martins, Ana; Vinagre, Pedro; Ratão, SofiaMaterials Science Forum Vols. 730-732 (2013) pp 617-622 ; In this paper an experimental work is presented which main objective is the evaluation of the influence of different percentages of waste fibrous materials usage on the performance of fiberreinforced mortars. Moreover, the influence of binder type is evaluated. Therefore mortars were produced with two different binders – cement and powder hydrated lime....
Compression and permeability properties of multiaxial warp-knit preforms
Padaki, N. V.; Alagirusamy, R.; Deopura, B. L.; Fangueiro, RaúlTextile preform properties such as compression and permeability greatly influence the quality of the composite material and its performance, particularly those prepared by injection moulding techniques like resin transfer moulding (RTM). Directionally oriented warp-knit biaxial, triaxial and quadraxial glass fabrics have been studied for these preform properties. The preform compression properties were tested o...
Experimental behavior of natural fiber-based composites used for strengthening ...
Codispoti, Rosamaria; Oliveira, Daniel V.; Fangueiro, Raúl; Lourenço, Paulo B.; Olivito, Renato S.This paper deals with the experimental characterization of the tensile behavior of fiber-based composites and flexural strength of natural fiber reinforced polymer (NFRP) sheets externally glued on masonry bricks, in terms of load capacity and stress distribution along the bonded length. The bricks adopted for this experimentation are solid clay bricks, typically used in ancient masonry structures. Non-impregna...
Use of textile fibres in the reinforcement of a gypsum-cork based composite mat...
Vasconcelos, Graça; Camões, Aires; Fangueiro, Raúl; Vila-Chã, Nuno; Jesus, Carlos M. G.; Cunha, Fernando Eduardo MacedoThe study presented herein focus on the analysis of a series of experimental tests aiming at characterizing the performance of distinct textile fibers acting as a reinforcement of a gypsum-cork composite material. Two groups of textile fibers were selected, namely synthetic fibers (glass and basalt) and natural fibers (banana and sisal). The reinforced composite material was submitted to distinct types of loadi...
Flexural behaviour of brick masonry retrofitted with braided textile meshes
Vasconcelos, Graça; Mora, Juan; Fangueiro, Raúl; Cunha, Fernando Eduardo Macedo; Martins, AndreiaThe vulnerability of unreinforced masonry walls (URM) under seismic events, causing huge loss of money and human lives, has revealed the enormous need for an efficient strengthening material. In this context, the present paper reports the development of a new reinforcing material for masonry walls based on braided fibrous structures. These fibrous materials were developed through braiding of polyester yarns aro...
Avaliação da introdução de resíduo da indústria têxtil em argamassas
Gonilho-Pereira, Cristiana; Martins, Ana; Faria, Paulina; Fangueiro, Raul4º Congresso Nacional de Argamassas e ETICS, Coimbra, 2012 (CD-ROM) ; O setor têxtil produz uma grande quantidade de resíduos de natureza fibrosa e, embora a sua utilização na construção seja hoje uma realidade, a acumulação destes resíduos em aterros sanitários continua a ser uma preocupação. Tendo em vista o desenvolvimento sustentável, através da diminuição da acumulação destes resíduos e da promoção da sua...
Noise reduction performance of thermobonded nonwovens
Carvalho, R.; Rana, S.; Fangueiro, Raúl; Soutinho, F.Acoustic insulation is an important requirement for the human life today, since noise affects the efficiency of day-to-day activities and even cause various health problems Materials based on fibrous structures show very good acoustic insulation properties, which however strongly depends on the type of structures used. The present paper reports the qualitative analysis of the acoustic insulation behavior of var...
Characterization of polyester with fiberglass materials as reinforcement in int...
Santos, Tiago; Velosa, J. C.; Ramos, Luís F.; Fangueiro, Raúl; Mendonça, PauloSome synthetic fibers present better mechanical performance compared with the natural fibers. Therefor research works were carried out to focus the characterization of polyester and glass fibers to be used as reinforcements in the internal dividing walls. Results from polyester fabrics made of compression with or without fiberglass were obtained.
Analysis of the absorption energy for NiTi wires under different diameters and ...
Medeiros, Ivan; Fangueiro, RaúlThis paper presents the research undertaken at the University of Minho aiming to study the the behaviour of 3D weft-knitted structures using SMA wires and elastomers, in order to produce dynamic structures as a support to answer specific situations and applications. Several samples were produced using nitinol® wires in different diameters and loop types. The Tensile tests were carried out being based to NP EN I...
Influence of structural and process parameters on mechanical behaviour of elast...
Cruz, Juliana; Carvalho, R.; Rana, S.; Fangueiro, Raúl; Coutinho, G.; Pereira, ManuelaIn this work, the influence of various structural and process parameters (such as linear density of core and cover and draw ratio) on the mechanical behaviour of elastane yarn has been thoroughly investigated. According to the experimental results, elastane yarns with high linear density core and cover and produced using higher draw ratio showed the best mechanical properties in terms of both strength and exten...
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