Experimental Investigation on the Tensile Strength Behaviour of Coconut Fibre-Reinforced Cement Concrete in Fiji and Pacific Region
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- First Online: 01 May 2020
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- Samuela Loaloa Vukicea 10 ,
- Swetha Thammadi 10 ,
- Sateesh Pisini 10 &
- Sanjay Kumar Shukla 10 , 11
Part of the book series: Lecture Notes in Civil Engineering ((LNCE,volume 72))
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Cement concrete is relatively brittle and its tensile strength is typically only about one-tenths of its compressive strength. It is becoming increasingly popular in various applications to reinforce the concrete with small, randomly distributed fibres. The main purpose is not only to increase the energy absorption capacity, called the toughness of the material, but also to increase the tensile and flexural strength of concrete. This experimental analysis is being carried out to investigate the effects of fibre quantity on tensile strength on coconut fibre-reinforced concrete. Coconut (coir) fibre-reinforced cement concrete with different fibre contents was reviewed together with plain cement concrete and a comparative analysis was made. Tensile strength was investigated for plain concrete mix and coconut fibre-reinforced concrete. The results obtained have been analysed critically and discussed for the practical applications. The results conclude that the addition of 1–4% of coconut fibres increases the tensile strength of plain cement concrete significantly. The fibres also formed a good bonding in the concrete. It can be deduced that the optimum fibre content for enhanced concrete strength is 3% by weight of cement.
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School of Building and Civil Engineering, Fiji National University, Suva, Fiji
Samuela Loaloa Vukicea, Swetha Thammadi, Sateesh Pisini & Sanjay Kumar Shukla
Discipline of Civil and Environmental Engineering, Edith Cowan University, Perth, Australia
Sanjay Kumar Shukla
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Varinder S. Kanwar
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Vukicea, S.L., Thammadi, S., Pisini, S., Shukla, S.K. (2020). Experimental Investigation on the Tensile Strength Behaviour of Coconut Fibre-Reinforced Cement Concrete in Fiji and Pacific Region. In: Kanwar, V., Shukla, S. (eds) Sustainable Civil Engineering Practices. Lecture Notes in Civil Engineering, vol 72. Springer, Singapore. https://doi.org/10.1007/978-981-15-3677-9_4
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M. Ranjitham , S. Mohanraj , K. Ajithpandi , S. Akileswaran , S. K. Deepika Sree; Strength properties of coconut fibre reinforced concrete. AIP Conf. Proc. 23 July 2019; 2128 (1): 020005. https://doi.org/10.1063/1.5117917
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The fiber obtained from the dry outer covering of the coconut fiber is termed as “coir”. This fiber has the best toughness among all natural fibres. These coir fibres have the tendency to be used as reinforcement in low cost concrete structures particularly in earthquake regions because of their property of toughness and sturdiness. Some advantages of coir fibers include insect proof, resistant to fungi and decay, provide good insulation against temperature and sound. They remain unaffected by external factors like humidity. They act as reinforcement substance by giving strength to the composite. To the brittle material concrete, a standard stresses or impact load is applied; the durability is 1/10 th of its compressive strength. Thus, reinforcing bars are used with concrete in order that they face upto tensile stresses and replace the shortage of malleability and strength. For the preparation of fiber concrete solid cube M20 grade cement is employed. The fiber is mixed with cement, fine aggregate (Msand), coarse aggregate (gravel) and needed quantity no f water that forms the concrete mix. A layer of oil is applied evenly within the cube mould to prevent the concrete from sticking to the mould. This concrete mix is then crammed fully within the solid cube mould. This is then left to dry for 24hrs. This is taken out from the mould and immersed curing is to be done for 3-7 days. The comparison of fiber concrete cubes with the conventional concrete cubes was the main aim of this study. Various tests were conducted to determine its compressive strength, density and crushing load.
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COMMENTS
In Chapter 2, review of literature related to natural fibres, Coconut fibre reinforced concrete and influence of length of fibres on strength are discussed In Chapter 3, a detailed explanation of ...
The increase in fresh density of concrete reinforced with coconut fibers is related to crack prevention since coconut fiber reinforced concrete has fewer plastic shrinkage voids and produces denser concrete. However, with the 4% addition of coconut fibers, compaction becomes problematic, resulting in porous concrete and lower fresh density.
Hwang et al. developed experimental tests on coconut fiber-reinforced concrete and observed that adding 4% coconut fiber to concrete can decrease its compressive strength by about 50%. In addition, the coconut fiber-reinforced concrete's water absorption and flexural strength can be increased by up to 33% and 50%, respectively.
It is due to the fact that coconut fiber reinforced concrete samples have a lower modulus of rupture than high-strength concrete. According to Figure 17a,b, a suitable bond between the fiber and cement paste was formed, i.e., there were no gaps between the fiber and cement paste, resulting in enhanced mechanical qualities.
A systematic literature review on the coir-reinforced cementitious composites will be beneficial regarding the current achievements and existing gaps for future investigations. ... Experimental investigations on coconut-fibre rope tensile strength and pullout from coconut fibre reinforced concrete. Constr. Build. Mater., 41 (2013), pp. 681-690 ...
Based on the above review of literature, three different treatments were proposed as the novelty of the present research to improve the morphological, fresh and mechanical characteristics of coconut fibre reinforced self-compacting concrete (CFRSCC). ... Strength and durability of coconut-fiber-reinforced concrete in aggressive environments ...
The coconut fiber-reinforced concrete (CFRC) Conclusions. Based on the extensive experimental work that was carried out, the following conclusions were obtained: 1. With respect to compressive strength, incorporating a small amount of coconut fiber (the best at 0.6%) enhances the performance of concrete exposed to tropical climate by ...
The addition of coconut fibres improved the flexural strength of concrete by about 12%, they also formed good bonding in the concrete. The study found the optimum fibre content to be 3% (by weight of cement). Further work is required by changing the fibre content and aspect ratio to determine the optimum range of fibre content so that fibre ...
Abstract. Coconut fiber is a material naturally available in many parts of the world. In this study, Coconut fiber reinforced concrete specimen were cast and tested to investigate the mechanical strength. Coconut fibers of length 25, 50, and 75 mm were added at four different proportions of 0.5%, 1%, 1.5% and 2% by mass of cement.
The fundamental purpose of this research is to provide an in-depth literature review on incorporating coconut fibers in cementitious composites, focusing on its mechanical properties, applications, and current state in the construction industry. ... In the coconut-fiber-reinforced concrete research field, the leading ten articles concerning ...
importance of coconut fiber in concrete. Therefore, this review focuses on the physical properties of coconut fibers, fresh properties, and mechanical and durability aspects of concrete reinforced with coconut fiber. A successful project will also give the idea to a new researcher to choose and apply coconut fiber in concrete. 2.
Concrete is the most utilized material in the construction industry. Concrete is said to be good in compression but has low tensile strength, and that is why it is usually reinforced with steel [].Lau and Anson [] studied the effect of high temperature on high-performance steel fibre reinforced concrete (SFRC) with heating temperatures ranging between 105 °C and 1200 °C.
The flexural strength of coconut fibre-reinforced concrete increases for 1-3% of fibre for M20 grade compared to conventional concrete. ... The results from the experimental studies are then compared to those from literature review. ... (2017) Utilization of natural fibre in concrete—a review. Int J Adv Eng Res Dev 4(9) Google Scholar ...
The results for the flexural strength of concrete gained at 28 days for 0.25%, 0.5% and 1.0% of coconut fibres were 28.82%, 22.15%, and 0.42%, respectively. Yan et al. [49] studied the mechanical properties of fibre-reinforced cementitious composites.
Coconut fiber reinforced concrete is at greater compressive strength with 83.33 aspect ratio at 3 % volume fraction of fiber and the values is also represented in graph in the Fig. 1. ... Literature review. The inclusion of steel fibers increases the compressive strength by 4.2 % compared to concrete without fibers. Compared to concrete without ...
A Review on Coconut Fiber Reinforced Concrete Sanjay Kumar Yadav1 Avinash Singh2 1M.Tech Student 2Assistant Professor 1,2Department of Civil Engineering ... A literature survey was carried out, which indicates that the detailed investigation of coconut fiber concrete is necessary. In the present study the
It is supported by research,60 which concluded that the density of concrete reinforced with jute fiber is lower than the density of concrete without reinforced fibers. In contrast, according to research,26 the fiber with a dose of 2.0% had the maximum density when compared to the control mix.
Reinforced concrete with coconut fiber is added to the concrete in varying proportion (0.6 and 1.2%) of this volume of concrete), with water cement rate of 0.50. Required stagnation value and compression strength nominal concrete were obtained at 0.5 ratio. However, while adding fiber to mix is observed low operability.
The fiber obtained from the dry outer covering of the coconut fiber is termed as "coir". This fiber has the best toughness among all natural fibres. These coir fibres have the tendency to be used as reinforcement in low cost concrete structures particularly in earthquake regions because of their property of toughness and sturdiness.
DOI: 10.1007/s13399-024-05682-3 Corpus ID: 269592165; Physicomechanical, microstructural morphological, and thermal characterizations of jute and coconut husk-based natural fibers reinforced hempcrete hurd composites for building and construction applications
This review paper examined the literature related to the field of natural fiber concrete with data obtained from the WoS Core Collection database, which contains over 10,000 disciplines and is fairly authoritative and comprehensive (Cavacini, 2015).Although Google Scholar exhibits a broader data collection, it has a relatively high duplication rate compared to WoS (Bar-Ilan, 2008).
The integration of waste materials in extrudable cement mixtures has the potential to make the construction industry more sustainable by reducing carbon footprints and developing eco-friendly materials. This along with advancements in 3D concrete printing (3DCP) provides engineering and architectural benefits by reducing material waste and costs. In this paper, the impact of waste ...