All natural composite sandwich beams for structural applications

Dweib, M. A.; Hu, Bo; O’Donnell, Annmarie; Shenton, Harry W.; Wool, Richard P.

doi:10.1016/s0263-8223(03)00143-0

Cited by 276 publications

(169 citation statements)

References 31 publications

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“…Hitherto, the most common fibre reinforcements used in geopolymer composites are based on carbon, basalt, and glass fibres [8][9][10][11][12], but concerns over the environment and non-biodegradability have made renewed interest recently in replacing the synthetic fibres used in geopolymer or other brittle matrices with natural plant  fibres. These include flax, hemp, jute, pineapple, straw, switch grass, kenaf, coir, and bamboo [13,14]. These plant fibres cost less, have low density, and display good mechanical properties when compared with industrial fibres [15].…”

Section: Introductionmentioning

confidence: 99%

Characterisation of mechanical and thermal properties in flax fabric reinforced geopolymer composites

et al. 2015

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This paper presents the mechanical and thermal properties of flax fabric reinforced fly ash based geopolymer composites. Geopolymer composites reinforced with 2.4, 3.0 and 4.1 wt% woven flax fabric in various layers were fabricated using a hand lay-up technique and tested for mechanical properties such as flexural strength, flexural modulus, compressive strength, hardness, and fracture toughness. All mechanical properties were improved by increasing the flax fibre contents, and showed superior mechanical properties over a pure geopolymer matrix. Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) studies were carried out to evaluate the composition and fracture surfaces of geopolymer and geopolymer/flax composites. The thermal behaviour of composites was studied by thermogravimetric analysis (TGA) and the results showed significant degradation of flax fibres at 300 ℃.

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Section: Introductionmentioning

confidence: 99%

Characterisation of mechanical and thermal properties in flax fabric reinforced geopolymer composites

et al. 2015

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“…One trend is the use of natural composites. Dweib et al (2004) and O'Donnell et al (2004) have proposed a new double -I-sandwich panel for claddings with the flanges and web made of soybean oil resins and natural fibres. Nevertheless, the core does not contribute in the structure, and it is made of closed cell polyisocyanurate foam.…”

Section: Current Approaches For Sustainable and High Efficiency Claddmentioning

confidence: 99%

Development of a novel façade sandwich panel with low-density wood fibres core and wood-based panels as faces

et al. 2010

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Abstract. The paper explores, experimentally and theoretically, the possibility of producing a novel cladding sandwich panel comprised of a low-density wood fibre (WF) core and faces made of wood-based panels.Tests on small specimens, using physical and optical devices, were performed for the basic mechanical characterization of WF. Shear modulus (G) was the main target; and values for a range of nominal densities (ρ) from 110 to 190 kg/m 3 were obtained.Short term load tests on real scale WF sandwich (WFS) specimens of 3.2m span were also performed. An initial simple analytical structural linear model, taking into account the shear deformation of the core, was used to evaluate the data obtaining a reasonable agreement.The results show that WFSs are a viable solution at least for claddings; special care must be taken, however, in the selection of the face panels due to the influence of hygro-thermal changes. The line of work is especially attractive as WF is a natural and sustainable product.

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“…Environmental awareness and depletion of the petroleum resources are among vital factors that motivate a number of researchers to explore the potential of reusing natural fiber [1][2][3][4] as an alternative composite material in industries such as automotive component [5,6], packaging materials [7],insulation [8,9], acoustic absorption panel [10,11] and building materials [12,13]. Natural fibers are available in abundance, low cost, lightweight polymer composite and most importance its biodegradability features [14][15][16][17], which often called "ecofriendly" materials.…”

Section: Introductionmentioning

confidence: 99%

Irradiated Jute Reinforced Polypropylene Composites: Effect of Mercerization and SEM Analysis

Bossunia¹,

Poddar²

2016

J Material Sci Eng

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Jute fibres (Corchorus olitorious L.), an environmentally and ecologically friendly product, were chemically modified and treated as surface treatment which was carried out by mercerizing jute fabrics with aqueous solutions of NaOH (5,10 and 20%) at different soaking times (30, 60 and 90 minutes) and temperatures (0, 25 and 50°C). These mercerized jute fabric reinforced polypropylene composites were fabricated by composition molding technique and equated with virgin jute fabric reinforced polypropylene composites, fabricated by same technique. The above composite samples ware compared by evaluating the mechanical parameters such as tensile strength, tensile modulus, bending strength, bending modulus. The effect of mercerization on weight and dimension of jute fabrics was studied. Mechanical properties of mercerized jute-PP composites ware measured and found highest at 20% NaOH at 0°C for 60 min soaking time. Alkali treatment helped in the development of hydrophobicity and reduction in volume fraction of the porosity. This may be due to the better fibre matrix interface adhesion caused due to the fibre surface treatment by alkali. The optimized formulation was irradiated by γ radiation at different dosage (100, 150, 200, 250 & 500 Krad). Among them 250 Krad showed highest mechanical properties.

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All natural composite sandwich beams for structural applications

Cited by 276 publications

References 31 publications

Characterisation of mechanical and thermal properties in flax fabric reinforced geopolymer composites

Characterisation of mechanical and thermal properties in flax fabric reinforced geopolymer composites

Development of a novel façade sandwich panel with low-density wood fibres core and wood-based panels as faces

Irradiated Jute Reinforced Polypropylene Composites: Effect of Mercerization and SEM Analysis

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