Effect of pine needle fibre reinforcement on the mechanical properties of concrete

AbstractThis investigation is carried out to understand the effects of water absorption on the mechanical properties of hybrid phenol formaldehyde (PF) composite fabricated with Areca Fine Fibres (AFFs) and Calotropis Gigantea Fibre (CGF). Hybrid CGF/AFF/PF composites were manufactured using the hand layup technique at varying weight percentages of fibre reinforcement (25, 35 and 45%). Hybrid composite having 35 wt.% showed better mechanical properties (tensile strength ca. 59 MPa, flexural strength ca. 73 MPa and impact strength 1.43 kJ/m2) under wet and dry conditions as compared to the other hybrid composites. In general, the inclusion of the fibres enhanced the mechanical properties of neat PF. Increase in the fibre content increased the water absorption, however, after 120 h of immersion, all the composites attained an equilibrium state.

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Processing and Mechanical Behavior of Banana Fibre Reinforced Epoxy based Composite with Alumina and silicon Carbide

International Journal of Scientific Research in Science and Technology ◽

10.32628/ijsrst218661 ◽

2021 ◽

pp. 434-441

Author(s):

Kaushal Arrawatia ◽

Kedar Narayan Bairwa ◽

Raj Kumar

Keyword(s):

Mechanical Properties ◽

Polymer Composites ◽

Glass Fibre ◽

High Strength ◽

Fibre Reinforcement ◽

Fixed Amount ◽

Reinforced Polymer ◽

Banana Fibre ◽

Percentage Weight ◽

Fibre Reinforced Polymer

Polymer composites have outstanding qualities such as high strength, flexibility, stiffness, and lightweight. Currently, research is being performed to develop innovative polymer composites that may be used in many operational situations and contain a variety of fibre and filler combinations. Banana fibre has low density compared to glass fibre and it is a lingo-cellulosic fibre having relatively good mechanical properties compared to glass fibre. Because of their outstanding qualities, banana fibre reinforced polymer composites are now widely used in various industries. The primary goal of this study is to determine the effect of the wt.% of banana fibre, the wt.% of SiC, and the wt.% of Al2O3 in banana fibre reinforcement composites on the mechanical and physical properties of banana fibre reinforcement composites. Tensile strength and flexural strength of unfilled banana fibre epoxy composite increased with the increase in wt. of banana fibre from 0 wt.% to 12 wt.%. Further, an increase in wt.% banana fibre drop in mechanical property was observed. It has been concluded from the study that the variation in percentage weight of filler material with fixed amount (12 wt.%) of banana fibre affects the mechanical properties of filled banana reinforcement composites. Optimum mechanical properties were obtained for BHEC5 (72 wt.% Epoxy + Hardener, 12 wt.% banana fibre and 16 wt.% Al2O3).

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Strength-Deformation Properties of Fine-Grained Fibre-Reinforced Concretes

Journal of Theoretical and Applied Mechanics ◽

10.2478/jtam-2013-0027 ◽

2013 ◽

Vol 43 (3) ◽

pp. 77-86

Author(s):

M. Mironova ◽

V. Naidenov

Keyword(s):

Mechanical Properties ◽

Residual Strength ◽

Experimental Results ◽

Fibre Reinforcement ◽

Standard Laboratory ◽

Basic Character ◽

Laboratory Environment ◽

Fine Grained ◽

Hybrid Fibre ◽

Deformation Properties

Abstract The main strength-deformation properties of fine-grained fiber-reinforced concretes with different type and quantity of fibres, used as repair overlays, are discussed. The results of mechanical properties of experimental compositions are obtained and generalized for two basis ages and standard laboratory environment. The experimental results are mathematical processed using MATLAB procedure. The basic character- istics - residual strength, toughness indexes and residual strength factors are obtained as a function of type as well as quantity of the hybrid fibre- reinforcement.

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Mechanical properties of partially pyrolysed composites with plain weave basalt fibre reinforcement

Ceramics International ◽

10.1016/j.ceramint.2013.12.102 ◽

2014 ◽

Vol 40 (5) ◽

pp. 7507-7521 ◽

Cited By ~ 15

Author(s):

Martin Černý ◽

Martina Halasová ◽

Jana Schwaigstillová ◽

Zdeneˇk Chlup ◽

Zbyneˇk Sucharda ◽

...

Keyword(s):

Mechanical Properties ◽

Fibre Reinforcement ◽

Basalt Fibre ◽

Plain Weave

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A discrete mesoscopic particle model of the mechanics of a multi-constituent arterial wall

Journal of The Royal Society Interface ◽

10.1098/rsif.2015.0964 ◽

2016 ◽

Vol 13 (114) ◽

pp. 20150964 ◽

Cited By ~ 6

Author(s):

Alexandra Witthoft ◽

Alireza Yazdani ◽

Zhangli Peng ◽

Chiara Bellini ◽

Jay D. Humphrey ◽

...

Keyword(s):

Mechanical Properties ◽

Arterial Wall ◽

Dissipative Particle Dynamics ◽

Mechanical Tests ◽

Discrete Models ◽

Particle Model ◽

Fibre Reinforcement ◽

Collagen Fibres ◽

Seamless Integration ◽

Basic Features

Blood vessels have unique properties that allow them to function together within a complex, self-regulating network. The contractile capacity of the wall combined with complex mechanical properties of the extracellular matrix enables vessels to adapt to changes in haemodynamic loading. Homogenized phenomenological and multi-constituent, structurally motivated continuum models have successfully captured these mechanical properties, but truly describing intricate microstructural details of the arterial wall may require a discrete framework. Such an approach would facilitate modelling interactions between or the separation of layers of the wall and would offer the advantage of seamless integration with discrete models of complex blood flow. We present a discrete particle model of a multi-constituent, nonlinearly elastic, anisotropic arterial wall, which we develop using the dissipative particle dynamics method. Mimicking basic features of the microstructure of the arterial wall, the model comprises an elastin matrix having isotropic nonlinear elastic properties plus anisotropic fibre reinforcement that represents the stiffer collagen fibres of the wall. These collagen fibres are distributed evenly and are oriented in four directions, symmetric to the vessel axis. Experimental results from biaxial mechanical tests of an artery are used for model validation, and a delamination test is simulated to demonstrate the new capabilities of the model.

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Dispersed Reinforcement Based on Natural Fibres Used in Cement Composites

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.722.216 ◽

2016 ◽

Vol 722 ◽

pp. 216-221

Author(s):

Jitka Peterková ◽

Martin Sedlmajer ◽

Magdalena Kocianova

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

Flexural Strength ◽

Thermal Insulation ◽

Considerable Effect ◽

Fibre Reinforcement ◽

Cement Composites ◽

Cellulose Fibres ◽

Natural Origin ◽

Waste Cellulose

One of the options for improving the mechanical properties of cement composites is the use of fibre reinforcement. Nowadays, steel or polymer fibres are most frequently used for this purpose. However, given the increasingly stricter requirements related to environmental protection, one goal is to find ways of using alternative fibres of natural origin or waste fibres for which it is difficult to find other practical use. This paper focuses on one part of the development of materials which contain natural waste fibres as dispersed reinforcement in thermally insulating cement composites. The authors aimed to observe what influence the fibres have on the material’s final mechanical properties as well as thermal insulation properties. Another important factor, which was investigated, was the quotient of mechanical and thermal insulation properties. The results of this research showed that waste cellulose fibres have a considerable effect. The best compressive strength values were found in mixture M-2-BF which contained waste basalt fibres. The highest flexural strength values were reached by mixture M-3-CF-a containing cellulose fibres.

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The impact of fibre processing on the mechanical properties of epoxy matrix composites and wood-based particleboard reinforced with hemp (Cannabis sativa L.) fibre

Journal of Materials Science ◽

10.1007/s10853-021-06629-z ◽

2022 ◽

Author(s):

Albert Hernandez-Estrada ◽

Jörg Müssig ◽

Mark Hughes

Keyword(s):

Mechanical Properties ◽

Fracture Zone ◽

Structural Integrity ◽

Bending Strength ◽

Cannabis Sativa ◽

Mechanical Performance ◽

Epoxy Composites ◽

Fibre Reinforcement ◽

Fibre Bundles ◽

The Impact

AbstractThis work investigated the impact that the processing of hemp (C. sativa L.) fibre has on the mechanical properties of unidirectional fibre-reinforced epoxy resin composites loaded in axial tension, and particleboard reinforced with aligned fibre bundles applied to one surface of the panel. For this purpose, mechanically processed (decorticated) and un-processed hemp fibre bundles, obtained from retted and un-retted hemp stems, were utilised. The results clearly show the impact of fibre reinforcement in both materials. Epoxy composites reinforced with processed hemp exhibited 3.3 times greater tensile strength when compared to the un-reinforced polymer, while for the particleboards, the bending strength obtained in those reinforced with processed hemp was 1.7 times greater than the un-reinforced particleboards. Moreover, whether the fibre bundles were processed or un-processed also affected the mechanical performance, especially in the epoxy composites. For example, the un-processed fibre-reinforced epoxy composites exhibited 49% greater work of fracture than the composites reinforced with processed hemp. In the wood-based particleboards, however, the difference was not significant. Additionally, observations of the fracture zone of the specimens showed different failure characteristics depending on whether the composites were reinforced with processed or un-processed hemp. Both epoxy composites and wood-based particleboards reinforced with un-processed hemp exhibited fibre reinforcement apparently able to retain structural integrity after the composite’s failure. On the other hand, when processed hemp was used as reinforcement, fibre bundles showed a clear cut across the specimen, with the fibre-reinforcement mainly failing at the composite's fracture zone.

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Physico-Mechanical Properties of Treated Chicken Feather–Reinforced Unsaturated Polyester Resin Based Composites

Nano Hybrids and Composites ◽

10.4028/www.scientific.net/nhc.32.73 ◽

2021 ◽

Vol 32 ◽

pp. 73-84

Author(s):

Md. Farhad Ali ◽

Md. Sahadat Hossain ◽

Tanvir Siddike Moin ◽

Samina Ahmed ◽

A.M. Sarwaruddin Chowdhury

Keyword(s):

Mechanical Properties ◽

Environmental Pollution ◽

Bending Strength ◽

Polyester Resin ◽

Unsaturated Polyester ◽

Tensile Modulus ◽

Unsaturated Polyester Resin ◽

Fibre Reinforcement ◽

Test Results ◽

Chicken Feather

The influence of chemical treatment on the mechanical properties of treated chicken feather fibre-reinforced unsaturated polyester resin (TCFF-UPR) composites was studied in this research. Redundant portions of chicken from poultry farms are comprehensively contaminating the environment. To minimize environmental pollution, these redundant portions need to use for the production of other materials. In this study, we used chicken feather for the preparation of useful composites combining with unsaturated polyester resin (UPR) to reduce environmental pollution. The composites were prepared successfully by conventional hand lay up technique using modified chicken feather as the reinforcing phase of composites. For preparing composites different percentages (2, 5, 7, 10, 12 and 15% by weight) of fibre were used. Attained tensile test results expressed significant enhancement in the tensile properties of composites, with the optimum combination of tensile strength presented by 5 wt% , tensile modulus presented by 10 wt% untreated chicken feather bio-fibre reinforcement and bending strength by 5 wt% chicken feather bio-fibre reinforcement.

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Mechanical Properties of Epoxy Composites Filled with Short Steel Fibres for Hybrid Injection Moulds

Materials Science Forum ◽

10.4028/www.scientific.net/msf.587-588.222 ◽

2008 ◽

Vol 587-588 ◽

pp. 222-226 ◽

Cited By ~ 8

Author(s):

Aurélio C. Sabino-Netto ◽

Gean V. Salmoria ◽

Carlos H. Ahrens ◽

António Sergio Pouzada

Keyword(s):

Mechanical Properties ◽

Thermal Properties ◽

Epoxy Composites ◽

Particulate Composites ◽

Mechanical And Thermal Properties ◽

Fibre Reinforcement ◽

Epoxy System ◽

Steel Fibres ◽

Hybrid Injection ◽

Short Steel Fibres

Epoxide filled composites are being increasingly used for mouldings blocks of hybrid injection moulds. The filling is sought for improving both mechanical and thermal properties that are relevant for the mould performance. In spite of several works investigating the particulate filling of resins, there are only a few reports on fibre reinforcement. Composites based on an epoxy system with varying volume fractions of short steel fibres (SSF) were investigated. The mechanical properties were determined for each composite, and the topography of the fracture surfaces was analyzed by SEM. The mechanical properties of the epoxy filled composites were also compared to commercial particulate composites that are used for producing casting moulds. In spite of the SSF being more difficult to mix that the usual metal particulate fillers, it was found that the resulting composites show some improvement in the mechanical properties.

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