Effect of Coconut Fibers Addition to early Age Unfired Soil Lime Bricks Strength

2013 ◽  
Vol 594-595 ◽  
pp. 471-476 ◽  
Author(s):  
Heru Purnomo ◽  
Dedi Priadi ◽  
Gilles Ausias ◽  
Thibaut Lecompte ◽  
H. Riana Lumingkewas ◽  
...  
Keyword(s):  
Fiber Length ◽  
Natural Fibers ◽  
Fiber Content ◽  
Early Age ◽  
West Java ◽  
Performance Quality ◽  
Potential Loss ◽  
Low Performance ◽  
Fiber Addition ◽  
Coconut Fibers

Low rise buildings and rural houses in Indonesia are often constructed with non-standard bricks. In some provinces, like West Java, fired clay and unfired soil lime bricks co-exist as non standard bricks. These bricks are traditionally produced in home run plants with little adherance to appropriate mix designs. These unfired soil lime bricks enter the market within 2 weeks of production, which inflicts potential loss to the buyers due to their low performance quality. The paper discusses strength improvements of these early age unfired bricks by adding natural fibers. Untreated coconut fibers with three different lengths (1 cm, 2.5 cm and 4 cm) were prepared for bricks reinforcements. The effects of 2%, 4% and 6% fiber addition to the strength of bricks were investigated. The bricks reinforced with 4% fiber content resulted in better strengths compared to those reinforced with other percentage of fibers. The effect of fiber length uniformity to the bricks strength was also evaluated. A 4% non-uniform fiber addition, which constitutes 1/3 part each of 1 cm, 2.5 cm and 4 cm average fiber length, was investigated. The results show that unfired bricks added with uniform fiber resulted in better performances compared to those added with non-uniform fibers. Higher compressive and bending strengths, compared to those strengths of unfired plain soil lime bricks and traditional soil lime bricks, could be achieved through fiber addition.

Effect of Age on Strength of Unfired Soil Lime Bricks Containing Non Uniform Coconut Fibers

2013 ◽  
Vol 423-426 ◽  
pp. 1096-1100 ◽  
Author(s):  
Heru Purnomo ◽  
R.G. Raka Basmara Putra ◽  
R. Mochammad Syaifulloh ◽  
Iwan Sulistyawan
Keyword(s):  
Fiber Length ◽  
Natural Fibers ◽  
West Java ◽  
Treated Fiber ◽  
Time Relation ◽  
Effect Of Age ◽  
Fiber Addition ◽  
Coconut Fibers

In some provinces in Indonesia, like West Java, fired clay and unfired soil lime bricks co-exist as non standard bricks. Low rise buildings and rural houses in Indonesia are often constructed with non-standard bricks. The paper discusses strength-time relation of unfired bricks reinforced with and without natural fibers. Untreated and treated coconut fibers with three different lengths (1 cm, 2.5 cm and 4 cm) were prepared for bricks reinforcements. The effects of 4% non-uniform fiber addition, which constitutes 1/3 part each of 1 cm, 2.5 cm and 4 cm average fiber length, was investigated. Absorption of the bricks was evaluated. For all type of bricks, up to 90 days compressive strengths are almost stable but bending strengths rapidly decrease with time. The results show that unfired bricks added with treated fiber resulted in better performances compared to those added with untreated fibers and without fibers.

Strength Improvement of Early Age Unfired Soil Lime Bricks

2013 ◽  
Vol 689 ◽  
pp. 299-303 ◽  
Author(s):  
Heru Purnomo ◽  
Dedi Priadi ◽  
H. Riana Lumingkewas
Keyword(s):  
Mechanical Properties ◽  
Fiber Length ◽  
Laboratory Tests ◽  
Early Age ◽  
Optimal Amount ◽  
Performance Quality ◽  
Low Performance ◽  
Mixing Water ◽  
Strength Improvement ◽  
Coconut Fibers

Despite their low performance quality and aesthetics, non-standard bricks are commonly used in the construction of low-rise buildings and rural houses in Indonesia. These bricks are produced traditionnally in home run plants with little adherance to appropriate mix designs. These unfired soil lime bricks enter the market within 2 weeks of production, which inflicts potential loss to the buyers due to their low performance quality. The paper discusses strength improvements of these early age bricks through 2 methods. The first method is by adding the optimal amount of mixing water to the soil and lime mix. The second method is by adding untreated coconut fibers with a 2.5 cm fiber length as additional reinforcements. The effect of 3%, 5% and 7% fiber addition to the mechanical properties of bricks were investigated. Laboratory tests showed that higher compressive strengths, compared to that of traditional unfired soil lime bricks, could be achieved through the 2 proposed methods. The bricks reinforced with higher percentage of untreated coconut fibers have better modulus of ruptures.

Experimental study on effect of fiber length and fiber content on tensile and flexural properties of bamboo fiber/epoxy composite

2019 ◽  
Vol 15 (5) ◽  
pp. 947-957 ◽  
Author(s):  
Giridharan R. ◽  
Raatan V.S. ◽  
Jenarthanan M.P.
Keyword(s):  
Mechanical Properties ◽  
Fiber Length ◽  
Epoxy Composite ◽  
Natural Fibers ◽  
Weight Ratio ◽  
Fiber Content ◽  
Bamboo Fiber ◽  
Flexural Properties ◽  
Fiber Reinforced ◽  
Content Type

Purpose The purpose of this paper is to study the effects of fiber length and content on properties of E-glass and bamboo fiber reinforced epoxy resin matrices. Experiments are carried out as per ASTM standards to find the mechanical properties. Further, fractured surface of the specimen is subjected to morphological study. Design/methodology/approach Composite samples were prepared according to ASTM standards and were subjected to tensile and flexural loads. The fractured surfaces of the specimens were examined directly under scanning electron microscope. Findings From the experiment, it was found that the main factors that influence the properties of composite are fiber length and content. The optimum fiber length and weight ratio are 15 mm and 16 percent, respectively, for bamboo fiber/epoxy composite. Hence, the prediction of optimum fiber length and content becomes important, so that composite can be prepared with best mechanical properties. The investigation revealed the suitability of bamboo fiber as an effective reinforcement in epoxy matrix. Practical implications As bamboo fibers are biodegradable, recyclable, light weight and so on, their applications are numerous. They are widely used in automotive components, aerospace parts, sporting goods and building industry. With this scenario, the obtained result of bamboo fiber reinforced composites is not ignorable and could be of potential use, since it leads to harnessing of available natural fibers and their composites rather than synthetic fibers. Originality/value This work enlists the effect of fiber length and fiber content on tensile and flexural properties of bamboo fiber/epoxy composite, which has not been attempted so far.

scholarly journals The Influence of the Addition of Plant-Based Natural Fibers (Jute) on Biocemented Sand Using MICP Method

Materials ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4198 ◽  
Author(s):  
Md Al Imran ◽  
Sivakumar Gowthaman ◽  
Kazunori Nakashima ◽  
Satoru Kawasaki
Keyword(s):  
Fiber Length ◽  
Natural Fibers ◽  
Construction Materials ◽  
Soil Improvement ◽  
Fiber Content ◽  
Microbial Interactions ◽  
Engineering Properties ◽  
Precipitation Trend ◽  
Calcareous Sand ◽  
Jute Fibers

The microbial-induced carbonate precipitation (MICP) method has gained intense attention in recent years as a safe and sustainable alternative for soil improvement and for use in construction materials. In this study, the effects of the addition of plant-based natural jute fibers to MICP-treated sand and the corresponding microstructures were measured to investigate their subsequent impacts on the MICP-treated biocemented sand. The fibers used were at 0%, 0.5%, 1.5%, 3%, 5%, 10%, and 20% by weight of the sand, while the fiber lengths were 5, 15, and 25 mm. The microbial interactions with the fibers, the CaCO3 precipitation trend, and the biocemented specimen (microstructure) were also evaluated based on the unconfined compressive strength (UCS) values, scanning electron microscopy (SEM), and fluorescence microscopy. The results of this study showed that the added jute fibers improved the engineering properties (ductility, toughness, and brittleness behavior) of the biocemented sand using MICP method. Furthermore, the fiber content more significantly affected the engineering properties of the MICP-treated sand than the fiber length. In this study, the optimal fiber content was 3%, whereas the optimal fiber length was s 15 mm. The SEM results indicated that the fiber facilitated the MICP process by bridging the pores in the calcareous sand, reduced the brittleness of the treated samples, and increased the mechanical properties of the biocemented sand. The results of this study could significantly contribute to further improvement of fiber-reinforced biocemented sand in geotechnical engineering field applications.

Effect of Fibers Length and Fibers Content on the Splitting Tensile Strength of Coconut Fibers Reinforced Concrete Composites

2017 ◽  
Vol 748 ◽  
pp. 311-315 ◽  
Author(s):  
Riana H. Lumingkewas ◽  
Abrar Husen ◽  
Rendy Andrianus
Keyword(s):  
Tensile Strength ◽  
Fiber Length ◽  
Plain Concrete ◽  
Fiber Content ◽  
Splitting Tensile Strength ◽  
Mass Ratio ◽  
Coconut Fiber ◽  
Strength Behavior ◽  
Fiber Concrete ◽  
Coconut Fibers

Tests on the Indonesian coconut fiber showed that, compared to the results of previous studies, tensile strength and tension failure improved after the fiber was washed with water and dried. This study aims to obtain the effects of fiber length and fiber content on splitting tensile strength behavior of the concrete composite reinforced with coconut fiber. Experimental observations were carried out on the splitting tensile strength of coconut fibers as determined by the fiber content (1, 2, 3, and 4 % by a mass ratio of fiber per cement) and the length of the fibers (5, 20, 40 mm) in the concrete. The results show that a coconut fiber length of 5 mm and a fiber content of 3 % in fiber concrete composite gives the composite 1.28 times higher splitting tensile strength than plain concrete. The density of the fiber concrete composite decreases with the addition of coconut fiber content.

Effect of Fibers Content on the Tensile Properties of Coconut Fibers Reinforced Cement Mortar Composites

2013 ◽  
Vol 742 ◽  
pp. 92-97 ◽  
Author(s):  
Riana H. Lumingkewas ◽  
Gilles Ausias ◽  
Thibaut Lecompte ◽  
Arnaud Perrot ◽  
Irwan Katili ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Failure Strain ◽  
Cement Mortar ◽  
Natural Fibers ◽  
Tensile Behavior ◽  
Fiber Content ◽  
Mass Ratio ◽  
Coconut Fiber ◽  
Reinforced Cement ◽  
Coconut Fibers

The coconut fiber presents higher ductile properties than other natural fibers. In previous studies, it demonstrated than Indonesian coconut fibers presents an improved tensile strength and failure strain after washed with water and dried. The coconut fibers have the potential to reinforce material for construction, especially in earthquake areas such as tropical countries. The purpose of this research is to assess the benefit brought by coconut fibers content on the tensile behavior of mortar composite. Splitting tensile strengths were measured and microstructure observed using scanning electron microscopy (SEM). The influence of fiber content (expressed by a mass ratio fiber/cement) is investigated. The results show that a fiber content of 5% allows a 10 times higher deflection and presents a 1.5 times higher tensile strength than mortar without fiber. Further studies will focus on the bond strength between the fiber and the cement mortar matrix.

scholarly journals Effect of Coconut Fiber Length and Content on Properties of High Strength Concrete

Materials ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1075 ◽  
Author(s):  
Waqas Ahmad ◽  
Syed Hassan Farooq ◽  
Muhammad Usman ◽  
Mehran Khan ◽  
Ayaz Ahmad ◽  
...  
Keyword(s):  
High Strength Concrete ◽  
Fiber Length ◽  
Natural Fibers ◽  
Construction Materials ◽  
High Strength ◽  
Coconut Fiber ◽  
Strength Concrete ◽  
Super Plasticizer ◽  
Scanning Electron ◽  
Coconut Fibers

Recently, the addition of natural fibers to high strength concrete (HSC) has been of great interest in the field of construction materials. Compared to artificial fibers, natural fibers are cheap and locally available. Among all natural fibers, coconut fibers have the greatest known toughness. In this work, the mechanical properties of coconut fiber reinforced high strength concrete (CFR-HSC) are explored. Silica fume (10% by mass) and super plasticizer (1% by mass) are also added to the CFR-HSC. The influence of 25 mm-, 50 mm-, and 75 mm-long coconut fibers and 0.5%, 1%, 1.5%, and 2% contents by mass is investigated. The microstructure of CFR-HSC is studied using scanning electron microscopy (SEM). The experimental results revealed that CFR-HSC has improved compressive, splitting-tensile, and flexural strengths, and energy absorption and toughness indices compared to HSC. The overall best results are obtained for the CFR-HSC having 50 mm long coconut fibers with 1.5% content by cement mass.

Effect of Coconut Coir Uniformity on Strength of Unfired Soil Lime Bricks

2014 ◽  
Vol 887-888 ◽  
pp. 819-823
Author(s):  
Heru Purnomo ◽  
R.G. Raka Basmara Putra ◽  
R. Mochammad Syaifulloh ◽  
Iwan Sulistyawan ◽  
Essy Arijoeni Basoenondo ◽  
...  
Keyword(s):  
Fiber Length ◽  
Natural Fibers ◽  
Fiber Reinforcement ◽  
Experimental Investigations ◽  
Treated Fiber ◽  
Time Relation ◽  
Coconut Coir ◽  
Coconut Fibers

The paper discusses strength-time relation of unfired bricks reinforced with and without natural fibers. Untreated and treated coconut fibers with three different lengths (1 cm, 2.5 cm and 4 cm) were prepared for soil lime bricks reinforcements. The effects of 4% uniform 2.5 cm fiber reinforcement was compared to the effects of 4% non-uniform fiber reinforcement, which constitutes a fiber mix between 1/3 part each of 1 cm, 2.5 cm and 4 cm fiber length. Absorption of brick was also evaluated. Experimental investigations reveal that for all type of bricks, up to 90 days compressive strengths decrease a little but bending strengths rapidly decrease with time. The results show that unfired bricks added with uniform treated fiber resulted in better strength performances compared to those added with uniform untreated, non-uniform untreated and non-uniform treated fibers, and also to those without fibers.

scholarly journals The Regression Models of Impact Strength of Coir Coconut Fiber Reinforced Resin Matrix Composite Materials

2020 ◽  
Vol 1 (1) ◽  
pp. 32-38
Author(s):  
Muhamad Fitri ◽  
Shahruddin Mahzan
Keyword(s):  
Composite Materials ◽  
Impact Strength ◽  
Matrix Composite ◽  
Fiber Length ◽  
Natural Fibers ◽  
Fiber Content ◽  
Resin Matrix ◽  
Coconut Fiber ◽  
Resin Matrix Composite ◽  
The Impact

The need of coconuts in Indonesia is relatively high. The use of large quantities of coconuts produces large amounts of organic waste from coco fiber, which tends to become waste if it is not used to be beneficial for humans.One of the potential uses of coconut fiber is as a reinforcement of natural fibers in polymer matrix composite materials. Recently, the applications of composite materials have been expanded widely including structural angine component which whitstand certain load like impact load. But most of them used synthetic fiber. Although the use of natural fibers as reinforcement in composite materials has been widely studied, their use is still limited because natural fibers have their own advantages and disadvantages. The purpose of this study was to measure the impact strength of specimens of coconut fiber reinforced polymer matrix composite material, and to determine the effect of the length and concentration of coconut fiber on its impact strength. A significant and valid regression model was also generated in this research, that states the relationship between fiber length and fiber content of resin matrix composite material to its impact strength. The result shows that the impact strength of the samples were influenced by fiber content and fiber length. The regression models for the impact strength of  resin composite reinforced with coconut fiber is Y = 4.44 +0.180 X1 – 0.52 X2  Where: Y = Impact Strength (kJ/m2), and X1= Fiber length (mm), and X2= Fiber content (%).

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