Physical and mechanical behaviour of recycled PET fibre reinforced mortar

Oliveira, Luiz António Pereira de; Castro-Gomes, João

doi:10.1016/j.conbuildmat.2010.11.044

Cited by 173 publications

(68 citation statements)

References 13 publications

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“…through melting or heat treatment and subsequent fibre spinning; -a comprehensive investigation has been herein undertaken, which encompasses and complements the previously cited investigation in a unified framework. As a matter of fact, this study starts with analyzing the properties of the fibres and their bond with the matrix and proceeds going on This kind of a thorough investigation hardly could be found in the literature so far, referenced studies dealing with either one or the other single property, and, but for one study [15] on mortar reinforced with R-PET fibres from shredded bottles, all focused on processed PET fiber spinning production.…”

Section: Introductionmentioning

confidence: 99%

Early age performance and mechanical characteristics of recycled PET fibre reinforced concrete

Borg

Baldacchino

Ferrara

2016

Construction and Building Materials

155

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In this study the performance of concrete reinforced with fibres produced from waste non-biodegradable plastic, polyethylene terephthalate (PET), has been thoroughly investigated. The novelty of the study, to the authors' knowledge, consists in the fact that fibres have been employed as directly shredded from collected waste plastic bottles, with no processing through, e.g., plastic melting and fibre spinning. Moreover, a comprehensive investigation has been herein undertaken, which ranges from the identification of the mechanical behavior of the fibres to the assessment of their bond with the matrix and of the early age and hardened state properties of the Recycled PET Fibre Reinforced Concrete. Different types of shredded Recycled PET fibres, straight and deformed, together with different fibre lengths, 30mm and 50mm, have been assessed, for varying percentage addition in concrete. The tensile properties and pull out characteristics of the fibres have been determined. The effects of fibres in mitigating plastic and restrained drying shrinkage cracking were then assessed and, finally, the compressive strength and the flexural performance of the fibre concrete were determined. The cracking potential of fibre-reinforced mortar thin slabs was also assessed. A slight reduction in compressive strength was reported while in the flexural performance assessment, the higher fibre volumes and the deformed fibres provided better residual strengths. In the assessment of plastic shrinkage, the R-PET fibres managed to restrain crack development even at low fibre volume fractions. The longer fibres were found to be more effective, with the deformed fibres performing slightly better than their straight counterparts in restraining crack development. In the case of restrained shrinkage cracking, 1% of 50mm long deformed PET fibres exhibited the best performance, with no cracks observed after 28 days. In the mortar slabs, a reduction in the total crack area was observed in both fibre types with an increase in fibre volume fractions. The use of Shredded Recycled PET fibres in concrete has been shown to lead to significant improvements in performance for various fibre concrete characteristics and offers a potential alternative for this material. The authors thank the reviewers for their careful reading of the manusript and for their insightful comments which are greatly appreciated. The recommendations of the reviewers have all been taken into due consideration in order to improve the quality of the manuscript as required.In detail:Reviewer 1 1.A pertinent sentence has been added. Highlights: The number of digits in the tables fibres obtained by shredding recycled PET bottles have been used as dispersed reinforcement in concrete  effects of fibres on cracking potential due to plastic and restrained drying shrinkage and on mechanical properties have been investigated  recycled PET fibres can effectively replace industrial fibres in structures sensitive to shrinkage cracking AbstractIn this study the performance of conc...

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Section: Introductionmentioning

confidence: 99%

Early age performance and mechanical characteristics of recycled PET fibre reinforced concrete

Borg

Baldacchino

Ferrara

2016

Construction and Building Materials

155

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“…Existen sistemas de reciclaje de desechos plásticos "solidos", los cuales en su gran mayoría son procesos de compactación y trituración, (García Villalba, Ponce Corral, Martínez López, & León Ordaz, 2016) cuyos productos son utilizados como complemento en procesos energéticos o de infraestructura (Pereira de Oliveira & Castro-Gomes, 2011), mas sin embargo, es muy poco lo que se ha trabajado en proyectos que involucren directamente la reutilización de las botellas plásticas, como por ejemplo la obtención de fibras en forma de hilos a partir de las botellas (Damián Eneque, 2016); permitiendo así la integración de esta actividad a un nuevo ciclo económico, generando la reutilización como materia prima para la elaboración de nuevos productos.…”

Section: Introductionunclassified

Diseño e implementación de una máquina recicladora de botellas plásticas por corte, controlada automáticamente

2017

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Se ha diseñado una máquina automática para la obtención de hilos y cintas mediante un proceso de corte rotacional continuo. Esta máquina procesa botellas plásticas usadas como envases para almacenamiento y transporte de bebidas gaseosas y no gaseosas con capacidad de tres litros. Es un diseño mecatrónico, compuesto por sencillos sistemas mecánicos/neumáticos, eléctricos y de control, que permite procesar hasta cincuenta botellas por hora. Se puede obtener una variedad de productos comprendidos entre aproximadamente 46.5 m de longitud de hilo de 1.6 mm de espesor (ancho) y 11.3 m de longitud de cinta de 6.7 mm de ancho por botella. Estos productos son materia prima económica obtenida de material de desecho como son las botellas plásticas, elementos altamente contaminantes del ambiente por el pequeño porcentaje que es reciclado especialmente en Ecuador. Esta materia prima puede tener aplicaciones en algunos procesos de manufactura como son: la fabricación de escobas, cuerdas, canastos, fundas, elementos sujetadores entre otros.

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“…Comisión Permanente del Hormigón, 2008). The cost and environmental sustainability of producing steel or plastics fibres (Pereira de Oliveira & Castro-Gomes, 2011) are the main disadvantages of these fibres in front of using natural ones. The current tendency of considering natural fibres is based on their environmental advantages: low energy consumption for their production, low CO2 emissions or even CO2 absorption and being a renewable resource with no toxicity are some of the strong points of the natural fibres as Corberos-Rodríguez (Corberos-Rodriguez, 2009) pointed out.…”

Section: Introductionmentioning

confidence: 99%

Additioning alfa fibres in cement mortar

Bernat-Masoa

Puigvertb

Abdelmoulac

et al. 2018

rdlc

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Cement mortar is a broadly used construction material. Adding fibres into the fresh mortar is an effective reinforcing technique to overcome the drawbacks related with the little tensile and flexural strength. Using natural fibres (mostly vegetal) is environmental sustainable and competitive. In particular, alfa fibre, which is produced in Mediterranean area, is herein considered. The main objective of this paper is analysing the mechanical performance of strengthening mortars using alfa fibre. Flexural and compressive tests have been performed and the experimental results showed a significant increase of the flexural strength and the toughness factor, whereas the compressive strength was slightly reduced when adding alfa fibres. The methodology used for measuring the toughness factor has been successfully adapted for this research and, thus, it might be applied to other materials. Different fibre dosages and lengths have been tested and the influence of these parameters have been analysed concluding that adding short fibres is the best option because of the better workability and the greater flexural performance.Key words: Alfa fibre, mortar, strengthening, experimental testing, toughness. ResumenEl mortero de cemento es un material ampliamente usado. Añadir fibras en mortero fresco es una manera efectiva de reforzar el material para superponerse a los problemas derivados de su baja resistencia a tracción y flexión. El uso de fibras naturales (mayormente vegetales) es ecológicamente sostenible y competitivo. En particular, se ha considerado para el estudio la fibra de esparto, cuya producción se concentra en áreas de clima mediterráneo. El principal objetivo de este artículo es analizar la mejora de propiedades mecánicas asociada al refuerzo de morteros con fibras de esparto. Ensayos a flexión y compresión se han llevado a cabo y los resultados experimentales muestran un significativo aumento de la resistencia a flexión y el factor de dureza, mientras que la resistencia a compresión se reduce ligeramente al añadir fibras de esparto. La metodología utilizada para medir la tenacidad es una adaptación particular para la presente investigación que resulta de utilidad para el ensayo de otros materiales de características similares. Se han utilizado diferentes dosificaciones de fibra y diferentes longitudes de fibra. La influencia de estos parámetros se ha analizado concluyendo que añadir fibras cortas es la mejor opción, debido al trabajo y resistencia a flexión obtenidos.

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Physical and mechanical behaviour of recycled PET fibre reinforced mortar

Cited by 173 publications

References 13 publications

Early age performance and mechanical characteristics of recycled PET fibre reinforced concrete

Early age performance and mechanical characteristics of recycled PET fibre reinforced concrete

Diseño e implementación de una máquina recicladora de botellas plásticas por corte, controlada automáticamente

Additioning alfa fibres in cement mortar

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