scholarly journals Characterization and treatment of sisal fiber residues for cement-based composite application

2014 ◽  
Vol 34 (5) ◽  
pp. 812-825 ◽  
Author(s):  
Paulo R. L. Lima ◽  
Rogério J. Santos ◽  
Saulo R. Ferreira ◽  
Romildo D. Toledo Filho
Keyword(s):  
Tensile Testing ◽  
Agricultural Residues ◽  
Sisal Fiber ◽  
Agricultural Product ◽  
Flexural Test ◽  
Fiber Production ◽  
Commercial Use ◽  
Pull Out ◽  
Sisal Fibers ◽  
Scanning Electron

Sisal fiber is an important agricultural product used in the manufacture of ropes, rugs and also as a reinforcement of polymeric or cement-based composites. However, during the fiber production process a large amount of residues is generated which currently have a low potential for commercial use. The aim of this study is to characterize the agricultural residues by the production and improvement of sisal fiber, called field bush and refugo and verify the potentiality of their use in the reinforcement of cement-based composites. The residues were treated with wet-dry cycles and evaluated using tensile testing of fibers, scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) spectroscopy. Compatibility with the cement-based matrix was evaluated through the fiber pull-out test and flexural test in composites reinforced with 2 % of sisal residues. The results indicate that the use of treated residue allows the production of composites with good mechanical properties that are superior to the traditional composites reinforced with natural sisal fibers.

Effect of Sisal Fiber Hornification on the Fiber-Matrix Bonding Characteristics and Bending Behavior of Cement Based Composites

2014 ◽  
Vol 600 ◽  
pp. 421-432 ◽  
Author(s):  
Saulo Rocha Ferreira ◽  
Paulo Roberto Lopes Lima ◽  
Flávio Andrade Silva ◽  
Romildo Dias Toledo Filho
Keyword(s):  
Dimensional Stability ◽  
Sisal Fiber ◽  
Multiple Cracks ◽  
Direct Tension ◽  
Wetting And Drying ◽  
Pull Out ◽  
Higher Dimensional ◽  
Bending Loads ◽  
Fiber Matrix ◽  
Sisal Fibers

Cycles of wetting and drying can change the microstructure of vegetable fibers through a mechanism known as hornification, which modifies the polymeric structure of the fiber-cells resulting in a higher dimensional stability. In the present work the influence of hornification on the sisal fiber-matrix bond adhesion as well as in the sisal fiber dimensional stability and mechanical behaviour under direct tension was evaluated. Furthermore, cementitious composites reinforced with randomly dispersed hornified sisal fibers were developed and characterized under bending loads. The results show that the tensile strength and strain at failure of the hornified sisal fibers were increased by about 5% and 39%, respectively, whereas the modulus of elasticity was reduced by 9%. The fibers also presented higher dimensional stability with the hornification process. The fiber-matrix bonding was improved and the pull-out resistance of the fibers submitted to ten cycles of wetting and drying was increased by about 40% to 50%. The higher fiber-matrix bond strength contributed to an increase in the ductility and post-cracking behaviour of the composite. The fracture process was characterized by the formation of multiple cracks with the hornified sisal fibers presenting a higher ability to bridge and arrest the cracks.

Evaluation of Interfacial Properties of Sisal Fiber Reinforced High Density Polyethylene (HDPE) Composites

2007 ◽  
Vol 334-335 ◽  
pp. 625-628 ◽  
Author(s):  
Yan Li ◽  
Hong Xia Deng ◽  
Ye Hong Yu
Keyword(s):  
Natural Fiber ◽  
Fiber Surface ◽  
Interfacial Properties ◽  
Sisal Fiber ◽  
Fiber Reinforced ◽  
Statistical Parameters ◽  
Pull Out ◽  
Bonding Properties ◽  
Fiber Surface Treatment ◽  
Sisal Fibers

Statistical methods were employed to study the structure characteristics of sisal fibers. Two types of fiber surface treatment methods, namely chemical bonding and oxidization were used to improve the interfacial bonding properties of sisal fiber reinforced HDPE (sisal/HDPE) composites. Interfacial properties were evaluated by single fiber pull out test. The interfacial shear strength (IFSS) was calculated and analyzed by the statistical parameters. The results were compared with those obtained by traditional ways. A novel method which could more accurately evaluate the interfacial properties between natural fiber and polymeric matrices was proposed.

scholarly journals Study of sisal fibre reinforced concrete in lintels

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Vinay Kumar ◽  
G.V. Yashasvi ◽  
S.K. Sudarshan
Keyword(s):  
Mechanical Characteristics ◽  
Sisal Fiber ◽  
Fibre Reinforced Concrete ◽  
Flexural Test ◽  
Compressive Test ◽  
Sisal Fibre ◽  
Specific Strength ◽  
Sisal Fibers ◽  
New Applications ◽  
Split Tensile Test

Concrete made with Portland cement has certain characteristics: - it is relatively strong in compression but weak in tension and tends to fail quickly when subjected to Tension. The deficiency in tension can be mitigated with conventional reinforcement & to some extent by the inclusion of a sufficient volume of Fibers. Change in the behavior of the Fiber – matrix composite after it has cracked, is due to the addition of Fibers (Balasubramanyan et al. 2015) Sisal Fiber is a promising concrete composite on account of its low density, less cost, increased specific strength and modulus, zero health risk, and it is easily cultivated in few countries including India. There has been an increasing interest in finding new applications for sisal-fiber which is traditionally used for making ropes, mats, carpets, fancy articles and others. The purpose of this research is to investigate the use of sisal fibers in concrete to enhance the mechanical characteristics of concrete and compare the differences in properties of concrete containing no fibers with fibers. The correlation on the effects of different type and geometry of fibers to the concrete is also the aim of the research. The scrutiny was carried out using several tests, which contained workability test, compressive test, split tensile test & flexural test. A total of ten mix batches of concrete containing 0%, 0.6%, 0.7%, 0.8% dosage of Fiber were cast. M25 grade concrete is considered for research as this grade is seen maximum consumption in industry. Keywords: concrete, sisal fibre, resistance.

Effect of Treatment of Sisal Fiber on Morphology, Mechanical Properties and Fiber-Cement Bond Strength

2014 ◽  
Vol 634 ◽  
pp. 410-420 ◽  
Author(s):  
Rogério de Jesus Santos ◽  
Paulo Roberto Lopes Lima
Keyword(s):  
Tensile Strength ◽  
Factorial Design ◽  
Morphological Characterization ◽  
Sisal Fiber ◽  
Pull Out ◽  
Gradual Loss ◽  
The Matrix ◽  
Number Of Cycles ◽  
Sisal Fibers ◽  
Dimensional Instability

The dimensional instability of vegetable fibers due to hygroscopicity results in a gradual loss of adherence in cement based composites which, when in service, are submitted to a natural variation of humidity. Such an effect reduces the contribution of the fiber as a reinforcement and can cause the early rupture of the material. In this work, a treatment of the sisal fibers is performed with the applying of wetting-drying cycles in order to alter their crystalline structure and improve the dimensional stability of the fiber to withstand the variation of humidity: 6, 10, 20, 30 and 34 cycles were applied in order to evaluate the effect on the properties of fiber; a tensile test, the morphological characterization (MEV) and the evaluation of the chemical structure of fiber were carried out. The effect of the treatment on fiber-matrix behavior was evaluated using the pull-out test. Embedded lengths of 16, 20, 30, 40 and 44 mm were defined through a factorial design and used in the test. It is verified that the use of 10 wetting-drying cycles causes less damage to the tensile strength and the elastic modulus of the fiber and contributes to a better adherence with the matrix, with an increase of up to 23 % compared with the untreated fiber. The statistical analysis of the interaction effect between the studied factors, using 2K factorial design with central composite design, indicates that the number of cycles can be decreased when using a longer length of the embedded fiber.Keywords: wetting-drying cycles, pull out test, tensile strength..

scholarly journals Influence of Sisal Fibers on the Properties of Rammed Earth

2019 ◽  
Vol 8 (9S2) ◽  
pp. 663-667
Keyword(s):  
Experimental Study ◽  
Compressive Strength ◽  
Bond Strength ◽  
Strength Properties ◽  
Coarse Sand ◽  
Sisal Fiber ◽  
Rammed Earth ◽  
Pull Out ◽  
Earth Blocks ◽  
Sisal Fibers

The use of rammed earth has been increasing widely during recent years in many countries as an alternative material for building houses due to its valuable characteristics such as affordability, environment friendly, comfort, strength and durability. This thesis presents the result of an experimental study to evaluate the compressive strength and bond strength properties of untreated, treated bamboo splints and steel reinforced cement stabilized rammed earth blocks. To overcome the deficiencies of blocks, sisal fibers are added to improve the performance of CSRE blocks. Fibers are secondary reinforced materials and acts as crack arresters which improves the strength of cement stabilized rammed earth blocks. In this experimental study, red soil is mixed by adding four different percentages (5%, 10%, 15%, and 20%) of OPC and sisal fiber with 0.2%, 0.4%, 0.6%, 0.8%, and 1.0% by weight of soil respectively. The bamboo splints were treated by soaking them in chemical solution of boric acid, Copper -Sulphate and Potassium Di-chromate (1.5:3:4).The resin-based adhesive with coarse sand will be applied to the top of bamboo splints. After 28days of curing period the cubes were tested for compressive strength, pull-out test is done for a series of CSRE blocks in which Bamboo splints and steel bars are embedded to find out its bond strength.

Effect of Sisal Fiber Surface Treatments on Sisal Fiber Reinforced Polypropylene (PP) Composites

2014 ◽  
Vol 906 ◽  
pp. 167-177 ◽  
Author(s):  
Hou Lei Gan ◽  
Lei Tian ◽  
Chang Hai Yi
Keyword(s):  
Surface Morphology ◽  
Morphological Changes ◽  
Fiber Surface ◽  
Atmospheric Plasma ◽  
Single Fiber ◽  
Sisal Fiber ◽  
Fiber Reinforced ◽  
Polypropylene Composites ◽  
Pull Out ◽  
Debonding Process

Abstract: The Interface of sisal fiber which was treated by using alkali, potassium permanganate, atmospheric plasma and silane reinforced polypropylene composites were investigated by single fiber pull-out testes and surface morphology were studied. The results indicated that the morphological changes observed on the sisal fiber surface were obviously evident. Untreated, permanganate and plasma treated sisal fiber reinforced PP show a stable debonding process. Silane treated sisal fiber reinforced PP show an unstable debonding process. Single fiber pull-out tests indicated that the IFSS value was in the order of FIB < FIBKMnO4 < FIBP < FIBKH-550 < FIBKH-570. As can be seen from surface morphology of pull-out fiber, a little of PP resin was adhered to the pull-out FIB, FIBKMnO4, FIBP of sisal fiber. In contrast, PP resin at the surface of pull-out fiber was flaked off and sisal fibril was drawn out from sisal fiber were observed from pull-out fibers of FIBKH-550 and FIBKH-570.

Test Comparison Research Mechanics Performance between Sisal Fiber Concrete and Rubber Powder Concrete

2011 ◽  
Vol 243-249 ◽  
pp. 494-498
Author(s):  
Hui Ming Bao
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Sisal Fiber ◽  
Environment Friendly ◽  
Rubber Powder ◽  
Comparison Research ◽  
Mechanics Performance ◽  
Fiber Concrete ◽  
Sisal Fibers

By means of the tests on the mechanics performance of the reinforcing concrete mixed with sisal fibers or rubber powder of certain content are investigated. The compressive strength, tensile strength and flexural strength, etc. are compared. The test indicates that when the test condition is same, the compressive strength, tensile strength and flexural strength of the sisal fibers concrete are better than those of the rubber powder’s. The sisal fiber concrete is environment friendly than the rubber powder concrete. And it has widely value of spread and utilization.

scholarly journals Cementitious Composites Reinforced with Polypropylene, Nylon and Polyacrylonitile Fibres

2012 ◽  
Vol 730-732 ◽  
pp. 271-276
Author(s):  
H.R. Pakravan ◽  
M. Jamshidi ◽  
M. Latifi ◽  
F. Pacheco-Torgal
Keyword(s):  
Absorption Capacity ◽  
Cement Matrix ◽  
Cementitious Composites ◽  
Scanning Electron Micrographs ◽  
Energy Absorption Capacity ◽  
Cement Ratio ◽  
Pull Out ◽  
Water To Cement Ratio ◽  
Before And After ◽  
Scanning Electron

This paper compares the adhesion strength between three polymeric fibres (polypropylene (PP), nylon66 (N66) and polyacrylonitrile (PAN)) embedded in a cement paste. The specimens were prepared at a water to cement ratio (w/c) of 0.5 and tested after 7, 14 and 28 curing days. It was found that although the adhesion between the polymeric fibres to the cement matrix is an important factor, the energy absorption capacity or energy dissipation ability of the fibres, plays a more important role in the improvement of the cementitious composites fracture toughness. Scanning electron micrographs were used to characterize the fibres surface before and after the Pull-out tests.

scholarly journals CHARACTERIZATION OF SISAL FIBERS BY INFRARED, UV-VIS DIFFUSE REFLECTANCE AND SCANNING ELECTRON MICROSCOPY

2019 ◽  
Vol 16 (31) ◽  
pp. 111-125
Author(s):  
Laudenor AMORIM ◽  
Santino Loruan Silvestre DE MELO ◽  
Sérgio Luís Moura DE PAIVA JÚNIOR ◽  
Enio Pontes DE DEUS
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Diffuse Reflectance ◽  
Polymer Matrix Composites ◽  
Impact Resistance ◽  
Morphological Characterization ◽  
Matrix Composites ◽  
Composites Materials ◽  
Sisal Fibers ◽  
Scanning Electron

The development of more resistant and inexpensive materials were important for the emergence of composites, materials that are the result of the mixing of two or more distinct components with improved properties. Vegetable fibers reinforced polymer matrix composites help to reduce costs as well as to preserve product quality. Sisal fibers are important due to good impact resistance and availability. Thus, the characterization used infrared spectroscopy and UV-Vis diffuse reflectance. The main purpose was to adapt the methodology used, in order to improve fiber-matrix adhesion, but without risks of fiber defibrillation. Scanning electron microscopy was used to obtain the morphological characterization and the energy-dispersive X-Ray spectroscopy to describe the elemental chemical composition of the fibers. Chemical treatments using NaOH 2% and acetylation with acetic acid and acetic anhydride in the ratio (1:1,5) were important to observe the main changes such as the removal of impurities and the smaller amount of water absorbed in the acetylated fiber, which allows a better adhesion of the fibers with a polymer. After this, the fibers can be used to the production of polypropylene and polyethylene composites that are expected to apply in automotive parts such as bumpers, fuel tanks and internal coatings.

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