Utilization of Coconut Shell in Different Forms in Concrete

IJSRD - International Journal for Scientific Research & Development| Vol. 2, Issue 07, 2014 | ISSN (online): 2321-0613
All rights reserved by www.ijsrd.com 158
Utilization of Coconut Shell in Different Forms in Concrete
Neetesh Kumar1
Dilip Kumar2
1
PG Student 2
Assistant Professor
1,2
Department of Civil Engineering
1,2
Madan Mohan Malviya University of Technology, Gorakhpur
Abstract— The rising cost of material is a matter of concern
in this developing construction environment. The prices of
building material such as cement, sand, gravel etc. are
increasing day by day. The reason for increase in cost is
high demand and less availability of material. Nowadays,
most of the researchers are doing research on the material
which can reduce the cost of construction as well as increase
the strength. Research on waste material such as fly ash, rice
husk, slag and sludge from treatment of industrial and
domestic waste water demolished building material is being
done. Use of coconut shell in concrete is not only useful
economically but also environmentally useful for human
being. Coconut shell is one of the main contributors of
pollution problem as a solid waste. Coconut shell used as
coarse aggregate in concrete encouraged sustainable and
environmentally helpful material in the construction field.
Since cement rate increases day per day and its availability
is decreasing as per time so it can be useful to use coconut
shell ash used as substitute of cement in concrete. Coconut
shell can be used in the form of powder with epoxy resins or
epoxy matrixes in concrete also. Composites are made by
combining two or more natural or artificial materials to
maximize their useful properties and minimize their
weaknesses.
Keywords: coconut shell, coconut shell ash, epoxy matrixes
or composites, coconut shell powder, cement, coarse
aggregate
I. INTRODUCTION
Many of the non-decaying waste materials will remain in the
environment for hundreds, perhaps thousands of years. The
non-decaying waste materials cause a waste disposal crisis,
thereby contributing to the environmental problems.
However, the environmental impact can be reduced by
making more sustainable use of this waste. This is known as
the Waste Hierarchy. Its aim is to reduce, reuse, or recycle
waste, the latter being the preferred option of waste disposal.
There were many experimental work conducted to improve
the properties of the concrete by putting new materials,
whether it is natural materials or recycle materials or
synthetic materials in the concrete mix. Concrete is an
artificial material similar in appearance and properties to
some natural lime stone rock. It is a man made composite,
the major constituent being natural aggregate such as gravel,
or crushed rock, sand and fine particles of cement powder
all mixed with water. The concrete as time goes on through
a process of hydration of the cement paste, producing a
required strength to withstand the load. The use of coconut
shell in concrete has never been a usual practice among the
average citizens, particularly in areas where light weight
concrete is required for non-load bearing walls, non-
structural floors, and strip footings. The chemical
composition of the coconut shell is similar to wood.
Coconut is grown in more than 93 countries. South East
Asia is regarded as the origin of coconut. India is the third
largest, having cultivation on an area of about 2.60 million
hectares. Annual production is about 7562 million nuts with
an average of 5295 nuts per hectare. The coconut industry in
India accounts for over a quarter of the world's total coconut
oil output and is set to grow further with the global increase
in demand. However, it is also the main contributor to the
nation's pollution problem as a solid waste in the form of
shells, which involves an annual production of
approximately 3.18 million tones. Coconut shell represents
more than 60% of the domestic waste volume.
II. OBJECTIVES
 To find economical and environmental helpful
solution for high cost of concrete.
 To discuss the use of coconut shell in the form of
ash as partial replacement of cement.
 To discuss the use of coconut shell powder with
epoxy resins/epoxy matrixes/composites in
concrete.
 To discuss the use of coconut shell as coarse
aggregate in concrete.
A. Chemical Properties of Coconut Shell Ash
Oxide CSA
SiO
2
37.97
Al
2
O
3
24.12
Fe
2
O
3
15.48
CaO 4.98
MgO 1.89
MnO 0.81
Na
2
O 0.95
K
2
O 0.83
P
2
O
5
0.32
SO
3
0.71
LOI 11.94
B. Physical Properties of Coconut Shell
S.N. Physical property Test result
1. Maximum Size (mm) 20
2. Fineness modulus 6.48
3. Specific Gravity 1.56

(IJSRD/Vol. 2/Issue 07/2014/037)
4. Bulk Density(kg/m3
) 510-600
5. Water Absorption (%) 23
6.
Aggregate Crushing Value
(%)
2.49
7.
Aggregate Impact Value
(%)
8.55
8. Moisture Content (%) 4.2
9. Shell Thickness(mm) 3-6
C. Coconut shell and crushed coconut shell
D. Use of Coconut Shell Ash as Replacement Of Cement
The cost of cement used in concrete works is on the increase
and unaffordable, thus the need to find alternative binding
materials that can be used solely or in partial replacement of
cement. One of the agricultural waste materials, coconut
shells are collected and burnt .in the open air (uncontrolled
combustion) for three hours to produce coconut shell ash
(CSA), which in turn was used as pozzolana in partial
replacement of cement in concrete production. The studies
showed that the density of concrete cubes for 10-15%
replacement was above 2400 Kg/m3
. The average density
decreases from 2525.5 Kg/m3
for OPC to 2314 Kg/m3
at
30% replacement. The density of cement is higher than that
of the CSA. The compressive strength meets the
requirement for use in both heavy weight and light weight
concreting. CSA meets the requirement for a pozzolana. The
setting times increases with increase in the amount of CSA.
The initial setting time increases from 1 hr 5 min at 0%
replacement to 3 hrs 26 min at 30% replacement while the
final setting time increases from 1 hr 26 min at 0%
replacement to 4 hrs 22 min at 30% replacement. The
pozzolanic activity index decreases with increasing
percentage replacement of OPC with CSA. The compressive
strength decreases with increasing percentage replacement
of OPC with CSA. The optimal 28 days strength for OPC-
CSA mix is recorded at 10% replacement is 31.78 N/mm2
.
E. Use Of Coconut Shell Powder With Epoxyresins/ Epoxy
Matrixes/ Composites In Concrete
The chemical composition of coconut shell powder having
Lignin (29.4%), Cellulose (26.6%), Pentosans (27.7%),
Solvent Extractives (4.2%), Moisture (8%), Uronic
Anhydrides (3.5%) and Ash (0.6%).The coconut shells
collected from local resoureces were crushed into small
pieces manually by using hammer. Then small pieces
converted into powder by same method. The collected
powder was then sieved to different sieve sizes.
Mechanical properties of coconut shell powder epoxy resin
are greatly affected by the how much volume filled by
coconut shell powder. Samples provided are on the 20 %, 30
%, 40 % coconut shell powder filled, from density point of
view it is observed that density of 20% CSP filled is less
than the other filled. When we go from 20% to 30 % density
curve increases gradually and when it goes to 40% from
30%, it increases more rapidly than other so from 30-40%
rate of increase in density is maximum.
Maximum tensile strength is obtained at 20% CSP
filed and it decreases as further increment in the ratio. Rate
of decreasing tensile strength is approximately constant
from 20% to 30% and from 30% to 40%.
Flexural strength of CSP composites increases
from 20 % to the 30 % of CSP filled and further it is
decreased for the 40 %. Flexural strength is minimum for
the 40% and rate of decrement in strength for 30-40% is
greater than rate of increment in flexural strength for the 20-
30%.
The composite prepared with 20% to 30% CSP
filled volume fraction is suitable for the application in the
interior part of an aircraft, motor car and automobilewhere
materials with good tensile strength, low density andlow
hydrophilic characteristic are required.
F. Use of Coconut Shell as Coarse Aggregate In Concrete
Using 1:2:4 proportions it is found that the density and
strength characteristics of concrete produced by volume
replacement of 20%, 30%, 40%, 50% and 100%
replacement of crushed granite with coconut shells were
investigated. It was concluded that
 Increase in percentage replacements by coconut
shells reduced the strength and density of concrete.
 With the exception of complete replacement, 20%,
30%, 40%, and 50% replacement of crushed
granite by coconut shells can be used in producing
lightweight concrete.
 18.5% replacement of crushed granite with coconut
shells can be used to produce structural concrete
per the requirements.
 Coconut shells can be used as partial replacement
of crushed granite or other conventional aggregates
in reinforced concrete construction.
 Coconut shell can be used as partial replacement of
coarse aggregate in concrete.
At M-25 mix design it was reported development
of the mix design of lightweight aggregate concrete using
Coconut shell aggregate (CSA) as coarse aggregate together
with cement and river sand. The compressive strength after
28 days was found to be in the ranges between 4.9 N/mm2
-
23.5 N /mm2
under water curing. The test results shows that
concrete using coconut shell aggregate has resulted in
acceptable strength required for structural lightweight
concrete. It is concluded that the lightweight concrete
developed from CSA aggregate can be used for both
structural and non-structural applications. This study was
carried out to determine the possibilities of using coconut
shell as aggregate in concrete. They concluded water
absorption of the coconut shell aggregate was high about 24
% but the crushing value and impact value was comparable

(IJSRD/Vol. 2/Issue 07/2014/037)
to that of other lightweight aggregates. The average fresh
concrete density and 28-day cube compressive strength of
the concrete using coconut shell aggregate were 1975 kg/m3
and 19.1 N/mm2
respectively.
` At the different proportions, the compressive
strength of concrete cubes produced with gravel and coconut
shells, for seven (7) days curing, the average compressive
strength for concrete cubes produced with coconut shell of
mix ratio 1:2:4, 1:11/2
:3, 1:3:6 were 8.6, 8.9, 6.4 N/mm2
respectively and 15.1, 16.5, 11N/mm2
respectively for 28
days. The 7 days cured concrete cubes produced with gravel
have an average compressive strength of 19.6, 18.5, and 9.6
N/mm2
and 28.1, 30.0 and 15.6 N/mm2
at 28days with mix
ratios of 1:2:4, 1:11/2
:3, 1:3:6. From the research, mix ratio
1:11/2
:3 of coconut shell with strength 16.5N/mm2
at 28 days
can be used as plain concrete.
III. CONCLUSIONS
There are several conclusions from above study:
(1) Coconut shell can be used in concrete to solve
environmental and economical problem.
(2) Coconut shell can be as coarse aggregate in
concrete and it give enough strength to concrete as
its crushing value and impact value is better than
coarse aggregate. It can be grouped as light weight
aggregate and used at different proportion as per
required strength.
(3) Coconut shell ash can e used as the partial
replacement of cement in concrete and proportion
depends upon the strength required and quality of
coconut shell ( property of coconut shell).
(4) Coconut shell powder with epoxy resin/matrixes
can be used in concrete.
ACKNOWLEDGEMENTS
We extend our thanks to the faculty of civil engineering
department, Madan Mohan Malviya University of
Technology, Gorakhpur for their contribution during work
REFERENCES
[1] Utsev J. T, Taku J. K. (2012), “Coconut Shell Ash as
Partial Replacement of Ordinary Portland Cement in
Concrete Production”, International Journal of
Scientific & Technology Research Vol. 1, Issue 8, pp.
86-89.
[2] V.K.Nagarajan, 2014, “Experimental Study on Partial
Replacement ofCement with Coconut Shell Ash in
Concrete”, International Journal of Science and
Research, Volume 3 Issue 3, March.
[3] Alok Singh et al. (2013), “Study of mechanical
properties and absorption behavior of coconut shell
powder-epoxy composites”, International Journal of
Materials Science and Applications, August 30.
[4] Abdulfatah Abubakar, Muhammed Saleh Abubakar
(2011), “exploratory study of coconut shell as coarse
aggregate in concrete”, Journal of Engineering and
Applied Sciences, Vol 3, Dec.
[5] Daniel Yaw Osei. (2013), “Experimental assessment
on coconut shells as aggregate in concrete”,
International Journal of Engineering Science
Invention, Vol. 2, Issue 5, pp. 07-11.
[6] Gunasekaran, K., Annadurai, R. & Kumar, P. S.,2012
“ Long term study on compressive and bond strength
of coconut shell aggregate concrete” Construction
and Building Materials 28 (1) 208-215.
[7] K.Gunasekaran, P.S.Kumar et al 2008, Proceedings
of International Conference on Advances in Concrete
and Construction, ICACC-2008”, Hyderabad, India
pp 450-459

Utilization of Coconut Shell in Different Forms in Concrete

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