Cementitious building materials reinforced with vegetable fibres: A review

Pacheco-Torgal, F.; Jalali, Saíd

doi:10.1016/j.conbuildmat.2010.07.024

Cited by 456 publications

(194 citation statements)

References 59 publications

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“…The former, which can be made from vegetable particles, are of great interest inasmuch as they are renewable (12) and often present good sound absorption capabilities (13). Other materials, also called "green materials", come from recycling processes; some of them use residues coming from construction and demolition wastes (14,15), crumb rubber (16) or plastic waste from recycling of electric wires (17).…”

Section: Introductionmentioning

confidence: 99%

Acoustic properties of porous concrete made from arlite and vermiculite lightweight aggregates

Carbajo¹,

Esquerdo-Lloret²,

Ramis³

et al. 2015

Mater. construcc.

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ABSTRACT:The use of sustainable materials is becoming a common practice for noise abatement in building and civil engineering industries. In this context, many applications have been found for porous concrete made from lightweight aggregates. This work investigates the acoustic properties of porous concrete made from arlite and vermiculite lightweight aggregates. These natural resources can still be regarded as sustainable since they can be recycled and do not generate environmentally hazardous waste. The experimental basis used consists of different type specimens whose acoustic performance is assessed in an impedance tube. Additionally, a simple theoretical model for granular porous media, based on parameters measurable with basic experimental procedures, is adopted to predict the acoustic properties of the prepared mixes. The theoretical predictions compare well with the absorption measurements. Preliminary results show the good absorption capability of these materials, making them a promising alternative to traditional porous concrete solutions. RESUMEN: Propiedades acústicas del hormigón poroso a base de áridos ligeros de arlita y vermiculita.El uso de materiales sostenibles se está convirtiendo en una práctica común para la reducción de ruido en las industrias de la edificación e ingeniería civil. Este trabajo investiga las propiedades acústicas de hormigón poroso fabricado a partir de áridos ligeros de arlita y vermiculita. Estos recursos naturales todavía pueden considerarse sostenibles ya que pueden ser reciclados y no generan residuos peligrosos para el medio ambiente. La base experimental utilizada se compone de especímenes de diferente tipo cuyas prestaciones acústicas se evalúan en un tubo de impedancia. Adicionalmente, se ha adoptado un modelo teórico simple para medios porosos granulares, basado en parámetros medibles con procedimientos experimentales básicos, con objeto de predecir las propiedades acústicas de las mezclas preparadas. Las predicciones teóricas muestran una buena concordancia con las medidas de absorción. Los resultados preliminares demuestran la buena capacidad absorbente de estos materiales, haciendo de ellos una alternativa prometedora a las soluciones de hormigón poroso tradicionales.

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Section: Introductionmentioning

confidence: 99%

Acoustic properties of porous concrete made from arlite and vermiculite lightweight aggregates

Carbajo¹,

Esquerdo-Lloret²,

Ramis³

et al. 2015

Mater. construcc.

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“…Likewise, organic fibres (palm, cellulose, hemp, etc.) [9], carbon fibres [10], synthetic fibres (e.g., polypropylene, polyethylene, polyvinyl alcohol, etc.) [11], and metallic fibres ( [12][13][14][15][16][17]) are amongst the most used fibre-shaped reinforcements.…”

Section: Introductionmentioning

confidence: 99%

Effect of Metallic Waste Addition on the Physical and Mechanical Properties of Cement-Based Mortars

et al. 2018

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Featured Application: The development of advance construction materials based on waste valorisation is a reality. The cement-based mortar with recycled metallic waste presented in this study could be potentially used as a building material with crack self-monitoring properties.Abstract: This paper investigates the influence of the type and amount of recycled metallic waste on the physical and mechanical properties of cement-based mortars. The physical and mechanical properties of cement mortars, containing four different amounts of metallic waste (ranged 4 to 16% by cement weight), were evaluated by measuring the bulk density, total porosity, flexural and compressive resistance, and dynamic elastic modulus by ultrasonic tests. All the properties were measured on test specimens under two curing ages: 7 and 28 days. Additionally, the morphological properties and elemental composition of the cement and metallic waste were evaluated by using Scanning Electron Microscopy (SEM), energy dispersive X-ray spectroscopy (EDXS), and X-ray fluorescence (XRF). Main results showed that the addition of metallic waste reduced the bulk density and increased the porosity of the cement-based mortars. Furthermore, it was observed that flexural and compressive strength proportionally increased with the metallic waste addition. Likewise, it was proven that elastic modulus, obtained by compressive and ultrasonic tests, increases with the metallic waste amount. Finally, based on a probability analysis, it was confirmed that the addition of metallic waste did not present a significant effect on the mechanical performance of the cement-based mortars.

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“…In the construction field, research is underway to the association of plant fibers to cementitious materials, like cementitious composites with glass fibers. However, the biochemical composition of these fibers delays the setting, their hydrophilic character affects the hydration of the cement and the workability of the mixture is unsuitable for many applications (Juarez et al 2007;Olorunnisola 2008;Pacheco-Torgal and Jalali 2011;Sawsen et al 2014Sawsen et al , 2015 However, the mechanical properties of the fibres present a significant variability when they are exposed to UV or water and decrease between 10 and 30 % (Le Duigou et al 2015;Thuault et al 2013a;Yan et al 2015). Thus, flax fibre has the potential to be used as reinforcement for construction and building composite materials if this variability is taken into account.…”

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confidence: 99%

Investigation of the internal structure of flax fibre cell walls by transmission electron microscopy

2015

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. Abstract The development of the use of flax fibre as reinforcement of eco-friendly composite materials requires a good knowledge of its hydrothermal and mechanical behaviours. To this end the fibre internal structure must be finely investigated. Transmission electron microscopy was used to analyse the morphology of the fibre cell walls in terms of the arrangement of the layers and their thickness. Thus, an alternative eco-friendly staining method, based on oolong tea extract was successfully implemented. The results reveal an arrangement at the nanoscale slightly different from the classical four layer model encountered in the literature: the inner layer includes three to four sub-layers. The cell walls comprises two outer layers of relative thickness of about 10 %, a middle layer of about 70 % and a group of thinner layers (called sub-layers) that are contiguous to the lumen with relative thickness of about 20 %.

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Cementitious building materials reinforced with vegetable fibres: A review

Cited by 456 publications

References 59 publications

Acoustic properties of porous concrete made from arlite and vermiculite lightweight aggregates

Acoustic properties of porous concrete made from arlite and vermiculite lightweight aggregates

Effect of Metallic Waste Addition on the Physical and Mechanical Properties of Cement-Based Mortars

Investigation of the internal structure of flax fibre cell walls by transmission electron microscopy

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