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An integrated recycling approach for GFRP pultrusion wastes: recycling and reus...
Castro, Ana Cristina Meira; Carvalho, João P.; Ribeiro, M. C. S.; Meixedo, João Paulo; Silva, Francisco J. G.; Fiúza, António; Dinis, M. L.In this study, efforts were made in order to put forward an integrated recycling approach for the thermoset based glass fibre reinforced polymer (GPRP) rejects derived from the pultrusion manufacturing industry. Both the recycling process and the development of a new cost-effective end-use application for the recyclates were considered. For this purpose, i) among the several available recycling techniques for t...
Mix design process of polyester polymer mortars modified with recycled GFRP was...
Ribeiro, M. C. S.; Fiúza, António; Castro, Ana Cristina Meira; Silva, Francisco J. G.; Dinis, M. L.; Meixedo, João Paulo; Alvim, Mário RuiIn this study, the effect of incorporation of recycled glass fibre reinforced plastics (GFRP) waste materials, obtained by means of shredding and milling processes, on mechanical behaviour of polyester polymer mortars (PM) was assessed. For this purpose, different contents of GFRP recyclates, between 4% up to 12% in weight, were incorporated into polyester PM materials as sand aggregates and filler replacements...
A case study on the eco-efficiency performance of a composite processing indust...
Dinis, M. L.; Fiúza, António; Ribeiro, M.C.S.; Alvim, M.R.; Castro, Ana Cristina Meira; Silva, F.J.G.; Meixedo, J.P.; Oliveira, L.In this study, an attempt was made in order to measure and evaluate the eco-efficiency performance of a pultruded composite processing company. For this purpose the recommendations of World Business Council for Sustainable Development (WCSD) and the directives of ISO 14301 standard were followed and applied. The main general indicators of eco-efficiency, as well as the specific indicators, were defined and dete...
Diagnóstico Citogenético em Líquidos Amnióticos Realizado entre 2000-2011 no Ce...
Mota Freitas, M.; Candeias, C.; Lopes, E.; Oliveira, F.P.; Aguiar, J.; Ribeiro, M.C.; Pires, S.; Oliva Teles, N.; Correia, H.; Fonseca Silva, M.L.Introdução: O diagnóstico pré-natal citogenético efetuado em líquido amniótico é um método seguro e fiável para deteção de anomalias cromossómicas fetais, sendo habitualmente realizado a partir das 15 semanas de gestação. Obtêm-se resultados, em média, após 8-10 dias de cultura dos amniócitos. Objectivo: Apresentar a estatística dos resultados obtidos na análise citogenética de líquidos amnióticos realizada na ...
Deleção cromossómica intersticial em 14q “de novo”: apresentação de um caso
Ribeiro, M.C.; Mota Freitas, M.; Ribeiro, J.; Lopes, M.M.; Oliva Teles, N.; Correia, H.; Fonseca e Silva, M.L.Introdução: As deleções intersticiais são anomalias cromossómicas estruturais, desequilibradas, resultantes de dois pontos de quebra, frequentemente associadas a quadros clínicos anormais devido à perda de material genético ativo (eucromatina). As consequências fenotípicas dependem do segmento cromossómico perdido e do número de genes aí localizados. Material e Métodos: Os autores apresentam o caso de um indiv...
PLSR Models for Mechanical Strengths of Concrete Composite Materials Reinforced...
Castro, Ana Cristina Meira; Ribeiro, M. C. S.; Meixedo, João Paulo; Silva, Francisco J. G.; Alvim, Mário Rui; Fiúza, António; Dinis, M. L.In this paper, we present two Partial Least Squares Regression (PLSR) models for compressive and flexural strength responses of a concrete composite material reinforced with pultrusion wastes. The main objective is to characterize this cost-effective waste management solution for glass fiber reinforced polymer (GFRP) pultrusion wastes and end-of-life products that will lead, thereby, to a more sustainable compo...
Mechanical behaviour analysis of polyester polymer mortars modified with recycl...
Ribeiro, M. C. S.; Meixedo, João Paulo; Fiúza, António; Dinis, M. L.; Castro, Ana Cristina Meira; Silva, Francisco J. G.; Costa, C.; Ferreira, F.In this study the effect of incorporation of recycled glass-fibre reinforced polymer (GFRP) waste materials, obtained by means of milling processes, on mechanical behaviour of polyester polymer mortars was assessed. For this purpose, different contents of recycled GFRP waste powder and fibres, with distinct size gradings, were incorporated into polyester based mortars as sand aggregates and filler replacements....
Finite Element Analysis (FEA) applied to heat transfer optimization process of ...
Silva, Francisco J. G.; Ferreira, F.; Costa, C.; Castro, Ana Cristina Meira; Meixedo, João Paulo; Castro, Mário Rui Alvim de; Santos, R. P. C.The aim of this study is to optimize the heat flow through the pultrusion die assembly system on the manufacturing process of a specific glass-fiber reinforced polymer (GFRP) pultrusion profile. The control of heat flow and its distribution through whole die assembly system is of vital importance in optimizing the actual GFRP pultrusion process. Through mathematical modeling of heating-die process, by means of ...
Optimization process of polyester polymer mortars modified with recycled GFRP w...
Silva, Francisco J. G.; Ribeiro, M. C. S.; Fiúza, António; Dinis, M. L.; Meixedo, João Paulo; Castro, Ana Cristina Meira; Costa, C.Glass fibre-reinforced plastics (GFRP), nowadays commonly used in the construction, transportation and automobile sectors, have been considered inherently difficult to recycle due to both: cross-linked nature of thermoset resins, which cannot be remolded, and complex composition of the composite itself, which includes glass fibres, matrix and different types of inorganic fillers. Presently, most of the GFRP was...
Reusability assessment of thermoset polymeric composite wastes as reinforcement...
Ribeiro, M. C. S.; Dinis, M. L.; Fiúza, António; Castro, Ana Cristina Meira; Silva, Francisco J. G.; Meixedo, João Paulo; Costa, C.; Ferreira, F.The development and applications of thermoset polymeric composites, namely fiber reinforced polymers (FRP), have shifted in the last decades more and more into the mass market [1]. Production and consume have increased tremendously mainly for the construction, transportation and automobile sectors [2, 3]. Although the many successful uses of thermoset composite materials, recycling process of byproducts and end...
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