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Light Weight Concrete Using Coconut Shell
Anbazhagan.A ,Gopinath. L, 12UG student, 3Assistant Professor,
Department of Civil ,
IFET College of Engineering,
Villupuram, Tamilnadu, India.
ABSTRACT
The high cost of materials for any conventional building is a major factor that affects the
housing delivery worldwide. This has necessitated research for alternative cost effective
materials in construction with the innovation . The paper aims at analysing characteristic
compressive and tensile strength of coconut shells of concrete produced. By introducing
coconut shells as a addition in conventional concrete in M30 grade concrete. The cube and
cylinder are casted, tested then physical and mechanical properties are determined. In this
studies, three different concrete mixes with different three mixes of with coconut shell in 20
mm aggregate, with 8mm aggregates and without coconut shell. Nine samples specimen will
be prepare for each concrete mixes. The parameters will be tested are compressive strength,
tensile strength.
Keywords:- introducing, addition, coconut shells.
1.Introduction
Infrastructure development across the
world created demand for construction
materials. Concrete is the premier civil
engineering construction material.
Concrete manufacturing involve
consumption of ingredients, aggregates,
water and admixture. Among all the
ingredients, aggregates form the major part.
Use of natural aggregate in such a rate leads
to a question about the preservation of
natural aggregates sources. In addition,
operations associated with aggregate
extraction and processing are the principal
causes of environmental concerns. In light
of this, in the contemporary civil
engineering construction, using alternative
materials in place of natural aggregate in
concrete production makes concrete as
sustainable and environmentally friendly
construction material. Different alternative
waste materials and industrial by products
such as fly ash, bottom ash, recycled
aggregates, foundry sand, china clay sand,
crumb rubber, glass were replaced with
natural aggregate and investigated
properties of the concretes. Apart from
above mentioned waste materials and
industrial by products, few studies
identified that coconut shells, the
agricultural by product can also be used as
aggregate in concrete.
India is the third largest, having cultivation
on an area of about 1.78 million hectares for
coconut production. Annual production is
about 7562 million nuts with an average of
4248 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. It also
presents serious disposal problems for local
environment, is an abundantly available
agricultural waste from local coconut
industries. In developing countries, where
abundant coconut shell waste is discharged,
these wastes can be used as potential
material or replacement material in the
construction industry. This will have the
double advantage of reduction in the cost of
construction material and also as a means of
disposal of wastes.
2. Selection of materials and tests:
1.Cement
2.Fine aggregate
3.Coarse aggregate
4. Coconut shell
Coconut shell
Coconut shell crushing value by
Compression testing machine 1.53%
Coconut shell aggregate impact by test
Impact testing machine 6.08%
Specific gravity by Wire Basket 1.5
3.Methodology
Proportioning of coconut shells in a big and
small configuration.
3.1 Mixing and casting
The solid ingredient of fine aggregate,
course aggregate, fly ash and egg shell
powder are dried and mixed for about 3
minutes and continued with solution such
as sodium hydroxide and sodium silicate
and also water for another 4 minutes. Then
placed to the mould which well prepared by
oil coat. Concrete is placed by three
compacted layer and allowed to place on
vibrator to dry out excess water and make
equal distribution of aggregates. After 24
hours specimen is allowed for curing
process.
3.2 Curing Curing was provided to strength
the concrete before it subjected to carrying
a loading condition. Due to absence of
cement material, heat of hydration is
negligible. Hence it doesn’t required water
curing. Curing is provided at room
temperature.
4. Result After proper curing of specimen,
they are allowed to test its strength to be
achieved on concrete. Three type of testing
to be carried using CTM and UTM is given
by
Compression test
Flexural test
Split tensile test
Conclusion
The result obtained from this test provides
clear conclusion about the combination of
concrete mix.
Coconut shell is suitable for the addition in
conventional concrete to reduce the density
of concrete which is usefull to reduce
weight of concrete and achieve light weight
concrete.
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