This document summarizes an experimental study on the effect of coconut fiber in concrete strength. The study used coconut fiber volumes of 0%, 1%, 2%, and 3% in an M20 concrete mix. Cubes were cast and tested for compressive strength. The results showed that the addition of fibers adversely affected the compressive strength. The methodology, expected outcomes, advantages, and disadvantages of using coconut fiber in concrete are also summarized. Some key references on the topic are provided.

1. Shetty Institute of Technology, Gulbarga
Department of Civil Engineering
Guidance : Prof. Rajkumar Ambalgi
* Rahul. 3TS15CV024
* Shivaling. 3TS15CV030
* Vishwanath. 3TS15CV041
* Santosh. 3TS16CV030

2. EXPERIMENTAL STUDY ON EFFECT OF
COCONUT FIBER IN THE STRENGTH OF
CONCRETE

3. ABSTRACT
 The aim of this project is to spread awareness of coconut fibers
as a construction material in Civil Engineering.
 This research describes experimental studies on the use of
coconut fiber as enhancement of concrete.
 There are various types of fibres such as steel fibre, plastic
fibre, nylon fibre, carbon fibres etc. And we used coconut fibre
also known as coir fibre.
 Volume fraction of fiber of 0%,1%,2%,&3%
 M20 mix proportion
 the addition of fibres adversely affected the compressive strength.

4. CONTENTS
 1.Introduction
 1.1 General
 1.2 Natural Fiber
 2.Literature review
 3.Material study
 4.Experimental study
 5. Methodology
 6. Expected Outcomes
 7. Advantages
 8. Disadvantages
 9.References

5. INTRODUTION
1.1 General
Concrete is most widely-used Man made construction material
and studies indicate that it will continue to be so in the years and decades to
come. Concrete is good in compression and also it is very strong in carrying
flexural force.
1.2 Natural fiber
Natural fibers include those made from plant, animal and
mineral sources we used Coconut fibers obtained from coconut husk. The
common name, scientific name and plant family of coconut fiber is coir, Cocos
nucifera and arecaceae (Palm), respectively.

6. LITERATURE REVIEWS
Ramakrishna G. And et all(2004) :-
impact strength of a few natural fibers reinforced
cement mortar slabs:a comparative study[topic]. Have experimentally investigated the
resistance to impact loading, using a simple projectile test, on cement mortar slabs
reinforced with four natural fibers, coir, sisal, jute, hibiscus and cannebinus. They have
concluded that, out of the four fibers, coir fiber reinforced mortar slab specimen have
shown the best performance.
John v.M.Et all:-
Have studied durability of mortar reinforced with coconut fibre.They
are concluded finally increasing durability at the presence of coir.

7. MATERIAL STUDY
3.1.Cement
The cement used should confirm to IS specifications. Portland cement Specific Gravity is 3.15
the most known and available everywhere. OPC 53 grade confirms to IS 112:1989 is used for this study.
3.2. Fine Aggregate
Naturally available fine aggregate is used for casting specimens. The fine aggregate was
passing through 4.75mm sieve and had a specific gravity of 2.68.(Zone 2 II of IS 383-1970)
3.3.Coarse Aggregate
Coarse aggregate are the crushed stone is used for making concrete. The maximum
size of coarse aggregate used for this investigation is 20mm and the specific gravity is 2.78.
3.4.Water
Water available in the college campus
3.5.Fibers
Uniform length of fibers was obtained by using cutting machine.

8. Figure shows cement and coconut fibers

9. EXPERIMENTAL STUDY
 Material used cement OPC (53 Grade, conforming IS 8112-1989)
 Fiber volume fraction of 0%,1%,2%,& 3% .
 M20 mix proportion (10262-1982)
 Sieve analysis of course & fine aggregates (IS 383-1970)
 Hand mixing was used for convenient handling of coir fiber. Sand and cement were mixed dry
and kept separately. Then coarse aggregates, coir fibers and dry mix of cement and sand were
kept in three layers and approximate amount of water was sprinkled on each layer and mixed
thoroughly.
 The cubes (150mm x 150mm×150mm)
 Each layer was compacted with 25 blows with 16 mm diameter steel rod.

10. METHODOLOGY

11. EXPECTED OUTCOMES
Aziz et al. concluded that the tensile strength and modulus
of rupture of cement paste increased when fibres up to 38
mm fibre length and 4% volume fraction were used. ... The
results indicated that coconut fibres with a length of 38 mm
and a volume fraction of 4% gave the maximum strength.

12. ADVANTAGES
 As stated, the main advantage of fiber-reinforced
concrete is the reduction of shrinkage and cracking. The
right fiber-reinforced concrete can also provide impact-
resistance, increase tensile strength and reduce voids in
the concrete.

13. DISADVANTAGES
 A disadvantage of fiber-reinforced concrete is that it can
adversely affect workability, especially in the case of steel fiber-
reinforced concrete. Even distribution of fibers throughout your
concrete is a concern. There may also be a danger of fibers
balling during mixing.
 Another disadvantage to be aware of is that fiber-reinforced
concrete is heavier than non-fiber concrete. If you’re using steel
fibers, there’s also the danger of corrosion. Finally, fiber-
reinforced concrete tends to be more expensive than ordinary
concrete, although the cost could be offset by other factors.

14. REFERENCES
 Asasutjarit C., Hirunlabh J., Khedari J., S. Charoenvai,B. Zeghmati , U. CheulShin
(2007),“Development of
 coconut coir-based lightweight cementboard”, Construction and Building Materials
vol.21, pp.277–288
 Majid Ali , Anthony Liu, Hou Sou, Nawawi Chouw(2012), “Mechanical and
 dynamic properties of coconut fibre reinforced concrete”, Construction and Building
Materials vol.30
 pp.814–825.
 John V.M., Cincotto M.A., Sjostrom C., Agopyan V., Oliveira C.T.A, (2005) ,

15.  Li, Z., Wang, L., and Wang, X. (2006). "Flexural characteristics of coir fiber
reinforced cementitious
 composites”. Fibers and Polymers. 7(3), 286-294
 Mansur M. A and Aziz M. A, “Study of Bamboo-Mesh Reinforced Cement
 Composites” Int. Cement Composites and Lightweight Concrete”, 5(3),1983,pp.
165–171.
 Ramakrishna,G., and Sundararajan,T. (2005). "Studies on the durability of natural
fibres and the effect of
 corroded fibres on the strength of mortar." Cement and Concrete Composites, 27(5),
575-582
 Yuhazri M.Y., and Dan M.M.P., (2007) Helmet Shell Using Coconut Fibr (Deco-
Helmet). Journal of
 Advanced Manufacturing Technology, Vol. 1 (No.1 pp. 23-30. ISSN 1985-3157.

16. THANK YOU