scholarly journals Investigation of Thermal, Mechanical and Transport Properties of Ultra-Lightweight Foamed Concrete (ULFC) Strengthened with Alkali Treated Banana Fibre

2021 ◽  
Vol 86 (1) ◽  
pp. 123-139
Author(s):  
Mohammed Hassan Nensok ◽  
Md Azree Othuman Mydin ◽  
Hanizam Awang
Keyword(s):  
Compressive Strength ◽  
Thermal Properties ◽  
Water Absorption ◽  
Volume Fraction ◽  
Fibre Volume Fraction ◽  
Fibre Volume ◽  
High Porosity ◽  
Control Specimen ◽  
Sem Images ◽  
Banana Fibre

Traditionally, Ultralightweight Foam Concrete (ULFC) is primarily used to replace filling excavations, ditch restoration and underground channels, because of their high porosity, water absorption and low strength. Yet, ULFC is characterized by excellent thermal properties and could be an alternative for sustainable energy-efficient building material. This study investigates the properties of an ULFC strengthened with alkali-treated banana fibre. The low density ULFC of 600kg/m3 was fabricated and strengthened with alkali-treated banana fibre. Fibre volume fraction of 0.25%, 0.35%, 0.45% and 0.55% were compared to the unreinforced specimens, serving as the control specimen (no fibre addition). Mix proportioning of 1:1.5:0.45 of cement, sand, and water was respectively adopted throughout the mix. The alkali treated banana fibre strengthened ULFC was tested for compressive strength, sorptivity and thermal properties. Morphology of the treated fibre and ULFC composites was studied using SEM micrograph. The result depicts that ULFC exhibited the optimum compressive strength of 1.1604N/mm2 with the fibre volume fraction of 0.35%. Sorptivity or rate of water absorption was testified to upsurge, after 24 hours duration at fibre volume fraction of 0.55%, recording a 56.12% increment compared to the control specimen. The finding displays that at the highest-fibre volume fraction of 0.55%, thermal conductivity and diffusivity decrease by 13.17% and 28.16%, correspondingly, whiles the specific heat capacity increases to 37.17% all compared with unreinforced specimens. SEM images reveal that the presence of lumen and the nature of porous and fibrous alkali-treated banana fibre. Hence, it is endorsed that ULFC produced with alkali-treated banana fibre should be utilized as an infill material for composite system.

scholarly journals The Mechanical Properties of Steel-Polypropylene Fibre Composites Concrete (HyFRCC)

2015 ◽  
Vol 773-774 ◽  
pp. 949-953 ◽  
Author(s):  
Izni Syahrizal Ibrahim ◽  
Wan Amizah Wan Jusoh ◽  
Abdul Rahman Mohd Sam ◽  
Nur Ain Mustapa ◽  
Sk Muiz Sk Abdul Razak
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Volume Fraction ◽  
Concrete Strength ◽  
Fibre Volume Fraction ◽  
Fibre Volume ◽  
Polypropylene Fibre ◽  
Experimental Results

This paper discusses the experimental results on the mechanical properties of hybrid fibre reinforced composite concrete (HyFRCC) containing different proportions of steel fibre (SF) and polypropylene fibre (PPF). The mechanical properties include compressive strength, tensile strength, and flexural strength. SF is known to enhance the flexural and tensile strengths, and at the same time is able to resist the formation of macro cracking. Meanwhile, PPF contributes to the tensile strain capacity and compressive strength, and also delay the formation of micro cracks. Hooked-end deformed type SF fibre with 60 mm length and fibrillated virgin type PPF fibre with 19 mm length are used in this study. Meanwhile, the concrete strength is maintained for grade C30. The percentage proportion of SF-PPF fibres are varied in the range of 100-0%, 75-25%, 50-50%, 25-75% and 0-100% of which the total fibre volume fraction (Vf) is fixed at 0.5%. The experimental results reveal that the percentage proportion of SF-PPF fibres with 75-25% produced the maximum performance of flexural strength, tensile strength and flexural toughness. Meanwhile, the percentage proportion of SF-PPF fibres with 100-0% contributes to the improvement of the compressive strength compared to that of plain concrete.

scholarly journals Mechanical properties and water absorption characteristics of composites reinforced with cotton fibres recovered from textile waste

2020 ◽  
Vol 15 ◽  
pp. 155892502090153
Author(s):  
Zunjarrao Kamble ◽  
Bijoya Kumar Behera
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Volume Fraction ◽  
Fibre Volume Fraction ◽  
Fibre Volume ◽  
Compression Moulding ◽  
Degradation Behaviour ◽  
Textile Waste ◽  
Thermoset Composites ◽  
Cotton Fibres

The primary aim of this research is to develop thermoset composites reinforced with cotton fibres extracted from textile waste. These composites are mainly targeted to replace timber in its application for furniture items and in some visible and non-visible automotive components. The pre-consumer cotton textile wastes such as cutting waste, in garment manufacturing, and defective fabrics were converted into the fibrous form called ‘shoddy’, using rag-tearing technique. The fibrous web of shoddy was produced using the carding machine. This web was used for developing thermoset composites as a reinforcement material. The thermoset composites with four different fibre volume fraction values, namely 0.1, 0.2, 0.3 and 0.4 were developed using compression moulding technique. The developed composites were characterised by mechanical properties, dynamic mechanical properties, thermal degradation behaviour and water absorption behaviour. The mechanical properties of the composites were found comparable with that of commercial wood. These composites can be used to develop a dashboard panel. The composites developed in this research have shown low water diffusion coefficient values as compared with pine, oak and linden wood.

scholarly journals Assessment of Water Permeability Test on Polypropylene based Self-Compacted Fibre Reinforced Concrete (PSCFRC)

2021 ◽  
Vol 1197 (1) ◽  
pp. 012080
Author(s):  
A Shelorkar
Keyword(s):  
Compressive Strength ◽  
Reinforced Concrete ◽  
Water Permeability ◽  
Volume Fraction ◽  
Fibre Volume Fraction ◽  
Fibre Volume ◽  
Polypropylene Fibre ◽  
Fibre Reinforced Concrete ◽  
Polypropylene Fibres ◽  
Concrete Mix

Abstract An investigation conducted to study the effect of water permeability and strength characteristics such as compressive strength of Polypropylene self-compacted fibre reinforced concrete (PSCFRC) is presented. Polypropylene fibres of lengths, 35 mm with a diameter of 0.44 mm, were systematically combined in different mix proportions to combinations of 0.2%, 0.4%, and 0.6% Polypropylene fibre volume fraction. For comparison, a concrete mix with no fibres was also mixed. A total of 72 cube specimens of 150 mm were tested, 36 each for compressive strength and water permeability at 28 and 56 days of curing. According to the findings of this study, a fibre combination of SCFRC 0.6 percent is the most acceptable fibre composition to use in Polypropylene self-compacted fibre reinforced concrete (PSCFRC) for maximum performance in terms of compressive strength and water permeability requirements together.

scholarly journals Genetic algorithm based ANN to predict compressive strength of siphon for different fiber volume fraction

2018 ◽  
Vol 7 (4.5) ◽  
pp. 681
Author(s):  
Gottapu Santosh Kumar ◽  
K Rajasekhar
Keyword(s):  
Neural Network ◽  
Genetic Algorithm ◽  
Compressive Strength ◽  
Volume Fraction ◽  
Fibre Volume Fraction ◽  
Fibre Volume ◽  
Ann Model ◽  
Fiber Volume ◽  
Manufactured Sand ◽  
Fibrous Concrete

This paper presents the applicability of Genetic Algorithm based Artificial Neural Network (GAANN) for predicting Compressive strength of Slurry Infiltrated Fibrous Concrete (SIFCON) prepared with manufactured sand for different fibre volume fraction (8%, 10% and 12%) as input vector. The network has been trained with data obtained from experimental work. The proposed GAANNs model is successfully used for predicting compressive strength of SIFCON (output vector) for various fibre volume fractions (2%, 4%, 6%, 14%, 16%, 18%, 20% and 22%) at 7 days, 28 days and 56 days of curing respectively. After successful learning GA based ANN model pre- dicted the compressive strength property satisfying all the constrains with an accuracy of about 85%.The various stages involved in the development of genetic algorithm based neural network are addressed in depth in this paper.  

Effect of CacO3 and Wood Flour Filler on the Compression Strength of Coconut (Coir) Fibre Reinforced Polymer (FRP) Composite

2007 ◽  
Vol 18-19 ◽  
pp. 249-251
Author(s):  
Anthony O. Inegbenebor ◽  
A.D. Ogbevire ◽  
A.I. Inegbenebor
Keyword(s):  
Compressive Strength ◽  
Volume Fraction ◽  
Wood Flour ◽  
Fibre Volume Fraction ◽  
Testing Machine ◽  
Fibre Volume ◽  
Coir Fibre ◽  
Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Coconut Fibre

Compression test specimens were produced from the composite material of fibre reinforced polymer (FRP). These specimens were tested on the compressive testing machine. The results obtained showed that 5% coconut fibre volume fraction with 95% volume fraction of polypropylene matrix gave compressive strength value of 39.3 Mpa. However, it was observed that when 15% volume fraction of CaCO3 and wood flour filler each were added, the compressive strength increased from 39.3 Mpa to 53.3 Mpa and 39.3Mpa to 43.7Mpa respectively. This observation was discussed in respect of the two fillers.

scholarly journals POROSITY, PERMEABILITY AND MICROSTRUCTURE OF FOAMED CONCRETE THROUGH SEM IMAGES

2019 ◽  
Vol 10 (1) ◽  
pp. 22-33 ◽  
Author(s):  
P. Shawnim ◽  
F. Mohammad
Keyword(s):  
Compressive Strength ◽  
Water Absorption ◽  
Pore Size ◽  
High Porosity ◽  
Capillary Water ◽  
Sem Images ◽  
Microstructural Investigation ◽  
Capillary Water Absorption ◽  
Foamed Concrete ◽  
Percentage Ratio

This paper examined the foamed concrete (FC) for permeability of total and capillary water absorption, at 28 days of air sealed curing. The microstructure of 15 selected FC specimens was investigated to determine permeability in relation to porosity and density using Scanning Electron Microscopy (SEM) images. The FC specimens of the densities (1100, 1600, and 1800) kg/m3 were made using fine sand and brick aggregates with toner and MK inclusion as additives. The microstructural investigation of the FC revealed, porosity measure as a percentage ratio of the area under investigation to be in the range of (39.65 to 77.7) %. The pore size is in the range of (0.01 to 70) µm, depending on the type of additive, for the mixes containing toner and MK, it is in a fine range of (0.01 to 10.0) µm. For the FC specimens, the finer the pore size, the less permeable and the stronger it is. Permeability is porosity and strength dependent, whereby high porosity leads to high permeability and low compressive strength for FC mixes made with sand or brick only with no additive inclusion. Meanwhile, the FC mixes made with the inclusion of additives, such as the toner and MK20 mixes, showed an evenly spread net of independent air voids with a regular shape within their matrix, which is beneficial in decreasing permeability. Therefore, besides the porosity and strength, the fineness of the pore matrix and the shape factor of the pores are two other key factors in controlling permeability. Toner and MK20 inclusion can enhance the capillary water absorption to reach almost water tight. Besides, MK30 and MK50 inclusion displayed adverse effect on permeability. Depending on the type of filler, the additive, and the percentage ratio of the porosity of the FC matrix at (1600 and 1800) kg/m3 densities, it is possible to produce FC with compressive strength between (55.1 and 30) N/mm2.

scholarly journals DAYA SERAP AIR DAN KANDUNGAN SERAT (FIBER CONTENT) KOMPOSIT POLIESTER TIDAK JENUH (UNSATURATED POLYESTER) BERPENGISI SERAT TANDAN KOSONG SAWIT DAN SELULOSA

2013 ◽  
Vol 2 (3) ◽  
pp. 17-21 ◽  
Author(s):  
Michael ◽  
Elmer Surya ◽  
Halimatuddahliana
Keyword(s):  
Water Absorption ◽  
Palm Oil ◽  
Volume Fraction ◽  
Unsaturated Polyester ◽  
Fibre Volume Fraction ◽  
Fibre Volume ◽  
Cellulose Content ◽  
Content Increase ◽  
Empty Fruit Bunch ◽  
The Matrix

This study was aimed to investigate the effect of empty fruit bunch palm oil and cellulose content as filler in water absorption and fibre volume fraction of the unsaturated polyester composites. The composites were made by hand-lay up method by mixing unsaturated polyester with the composition of each fillers (empty fruit bunch palm oil and cellulose) of 5,10,15,20 wt%. The parameter which was carried on the prepared samples was water absorption for each sample every 24 hours until the composites have constant absorption. It was found that the addition of fillers to the matrix caused the water absorption of composites increased at each of composition of fillers (empty fruit bunch palm oil and cellulose) and the fibre volume fraction increased as the filler content increase.

Influence of yarn hybridisation and fibre architecture on the compaction response of woven fabric preforms during composite manufacturing

2021 ◽  
pp. 152808372110242
Author(s):  
Hussein Kommur Dalfi ◽  
Zeshan Yousaf ◽  
Erdem Selver ◽  
Prasad Potluri
Keyword(s):  
Volume Fraction ◽  
Mechanical Test ◽  
Fibre Volume Fraction ◽  
Single Layer ◽  
Fibre Volume ◽  
Woven Fabric ◽  
Thickness Reduction ◽  
Compression Tests ◽  
Sem Images ◽  
Composite Manufacturing

Fabric preforms undergo transverse compaction during composite manufacturing. This compaction changes the preform thickness, fibre volume fraction (FVF), tow geometry and voids for resin flow. In this paper, influence of yarn hybridisation and fibre architecture on the compaction response of woven fabric preforms has been studied. A series of cyclic compression tests have been carried out on both dry and wet preforms. The effect of hybridisation on compressibility has been investigated for single as well as multilayer fabrics. The influence of interlacement pattern (twill and satin fabrics) with hybrid yarns has also been investigated. Nesting efficiencies of multilayer stacks have been studied by utilising mechanical test results. Additionally, the meso-structure of single and multilayer fabrics under 1 bar pressure has been analysed using SEM images. It is observed that the thickness reduction for single layer twill hybrid fabric is 38% while thickness reduction for twill S-glass fabric is 67% at 100 kPa. Moreover, single layer hybrid twill fabrics have shown higher compressibility resistance (60% thickness reduction at 100 kPa) compared to single layer hybrid satin fabrics (which showed 67% thickness reduction at 100 kPa). Whereas opposite trend is observed for multilayer hybrid fabrics due to nesting effect.

Effect of fibre content on the mechanical properties of hemp fibre woven fabrics/polypropylene composite laminates

2021 ◽  
pp. 096739112110239
Author(s):  
Sheedev Antony ◽  
Abel Cherouat ◽  
Guillaume Montay
Keyword(s):  
Mechanical Properties ◽  
Polymer Matrix ◽  
Composite Laminates ◽  
Volume Fraction ◽  
Fibre Volume Fraction ◽  
Fibre Volume ◽  
Woven Fabrics ◽  
Fibre Content ◽  
Viscoelastic Behaviour ◽  
Hemp Fibre

Nowadays natural fibre composites have gained great significance as reinforcements in polymer matrix composites. Composite material based on a polymer matrix reinforced with natural fibres is extensively used in industry due to their biodegradability, recyclability, low density and high specific properties. A study has been carried out here to investigate the fibre volume fraction effect of hemp fibre woven fabrics/PolyPropylene (PP) composite laminates on the tensile properties and impact hammer impact test. Initially, composite sheets were fabricated by the thermal-compression process with desired number of fabric layers to obtain composite laminates with different fibre volume fraction. Uniaxial, shear and biaxial tensile tests were performed and mechanical properties were calculated. Impact hammer test was also carried out to estimate the frequency and damping parameters of stratified composite plates. Scanning Electron Microscope (SEM) analysis was performed to observe the matrix and fibre constituent defects. Hemp fabrics/PP composite laminates exhibits viscoelastic behaviour and as the fibre volume fraction increases, the viscoelastic behaviour decreases to elastic behaviour. Due to this, the tensile strength increases as the fibre content increases. On the other hand, the natural frequency increases and damping ratio decrease as the fibre volume fraction increases.

scholarly journals Insulation Characteristics of Sisal Fibre/Epoxy Composites

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
A. Shalwan ◽  
M. Alajmi ◽  
A. Alajmi
Keyword(s):  
Volume Fraction ◽  
Fibre Volume Fraction ◽  
Thermal Characteristics ◽  
Fibre Volume ◽  
Point Of View ◽  
Natural Fibres ◽  
Epoxy Composites ◽  
Ongoing Research ◽  
Sisal Fibre ◽  
The Impact

Using natural fibres in civil engineering is the aim of many industrial and academics sectors to overcome the impact of synthetic fibres on environments. One of the potential applications of natural fibres composites is to be implemented in insulation components. Thermal behaviour of polymer composites based on natural fibres is recent ongoing research. In this article, thermal characteristics of sisal fibre reinforced epoxy composites are evaluated for treated and untreated fibres considering different volume fractions of 0–30%. The results revealed that the increase in the fibre volume fraction increased the insulation performance of the composites for both treated and untreated fibres. More than 200% insulation rate was achieved at the volume fraction of 20% of treated sisal fibres. Untreated fibres showed about 400% insulation rate; however, it is not recommended to use untreated fibres from mechanical point of view. The results indicated that there is potential of using the developed composites for insulation purposes.

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