IRJET- Experimental Investigation on Concrete by Partial Replacement of Coarse Aggregate by Cinder.

International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
Volume: 06 Issue: 05 | May 2019 www.irjet.net p-ISSN: 2395-0072
© 2019, IRJET | Impact Factor value: 7.211 | ISO 9001:2008 Certified Journal | Page 5413
Experimental Investigation on Concrete by Partial Replacement of
Coarse Aggregate by Cinder
DHANRAJ A C1, GANESHA S N2, HANUMANTH L3, WESLEY MANOHAR PETER4, SWETA C PATIL5
1,2,3,4,5Smt. Sweta C Patil Asst.Professor, Dept. of Civil Engineering, Sri Taralabalu Jagadguru Institute of
Technology, Ranebennur, Karnataka, India
---------------------------------------------------------------------***----------------------------------------------------------------------
Abstract - Light weight concrete has become more popular
in recent years owning to the tremendous advantages it
offers over the conventional concrete. The main specialties
of lightweight concrete are its low density and thermal
conductivity. Its advantages are that there is a reduction of
dead load, faster building rates in construction and lower
haulage and handling costs. We are replacing the cinder
instead of coarse aggregate; it is obtained from steel
industries. The surface of the cinder is usually rough and
high porous due to mineral structures. Low specific gravity
of cinder in compression with natural aggregates resulted in
the concrete made with cinder to be lighter than normal
concrete. Based on the literature, the main function for
usage cinder material is to minimize the cost and it is
reduced to disposal of waste material and it helps in
reduction of dead load. An experimentally study has been
conducted on concrete with partial replacement of
conventional coarse aggregate by another light weight
aggregate. The M30 concrete mix is designed using ISI
method. We make concrete by replacing coarse aggregate
with cinder of different percentages like0%, 20%, 40%,
60%,80% and 100% with curing of 7 and 28 days. Among
all the percentages the better compressive strength
obtained percentage is selected.
Key Words: Light weight concrete, thermal conductivity,
M30 concrete mix, ISI method.
1. INTRODUCTION
In recent days, due to the developments and innovations
in the new construction materials, stress analysis
approaches towards finding of the weight less structures
to reduce the weight of the construction has lead to
development of the Light Weight Aggregate Concretes
(LWAC) to increase the strengths and weights. Concrete is
one of the most multipurpose material used in building
construction. In structural applications, the self-weight of
the structure is quite important as it represents a major
portion of its dead load. Replacing partially or entirely the
coarser normal weight aggregate in conventional concrete
can be replaced partially or fully with low density
aggregates will produces lightweight concrete that can
reach a reasonably good compressive resistance [1].The
advantages of lightweight Aggregate concrete (LWAC) are
its reduced mass and improved thermal and sound
insulation properties, while maintaining adequate
strength. The reduced self-weight of LWAC will reduce the
gravity load as well as seismic inertial mass which leads to
decreased member sizes as well as forces on foundation
can be reduced. Aggregates contribute an important role
in concrete volume as they contribute to 60 to 70 percent
of the total volume. Thus they have an major influence on
the different material properties like density, specific
gravity, water absorption etc., Cinder is the material
comes under the category light weight aggregate and it is a
byproduct of steel, iron manufacturing companies. The
surface of cinder aggregate is usually rough and highly
porous due to mineral structure. The cinder material
visually classified as having 100% crushed face and have
been used for making building blocks for partition walls.
2. LITERATURE SURVEY
To get an overview of problem building for the present
research, all the available earlier studies were browsed
both in India as well as around the world. Special attention
was given on how the earlier workers have used LWAC
towards understanding the strengths of the concrete of
their study area. A brief review of available studies related
to the present strength properties of concrete materials is
as follows.
2.1 Seabrooks, 1988 [2]. Demonstrates the results of the
162 trial mixtures of the second phase of a three-phase
programme, using aggregates from the three sources such
as, two chemical admixture systems, three levels of fly ash
replacement, and three levels of silica fume replacement. It
is resulted that 91 day compressive strengths of the order
of 65 MPa are attainable light weight concrete, although
this is the threshold level of the aggregates. Further, it is
concluded that a nominal increase in strength occurs with
Type F ash replacement and addition of the silica fume.
2.2 Bhaskar Desai et al., 1993, 1999, 2000 [3, 4, 5]. An
effort is made to study the strength properties of LWAC in
various % proportions of 0, 25, 50, 75 and 100 of cinder
and calculated the properties such as compressive
strength, split tensile strength, modulus of elasticity,
density and shear stress. And this study concludes that,
mode – II failure is procured at Double Central Notched
specimen geometry. Furthermore, they made finite
element analysis to disembarkat stress intensity factor and
these geometry and finite elemental studies have applied in
the investigations of mortar, cement paste, and plain
concrete.

2.3 Siva lingaRao, et.al., 2011 [6]. Accomplished that, the
best mean strength results of M20 concrette have occurred
at the 60 percent replacement of conventional aggregate
with cinder by volume along with cement replaced by
10percent of silica fume by weight. In addition to this it is
also noted that there is a slight increase in the strength of
based on the during period extension and the unit weight
of the cinder concrete is varying from 1980 to 2000
Kg/m³.furthermore, it is also noted that there is a decrease
in density after extended curing periods.
3. MATERIALS AND THEIR PROPERTIES
The materials which are used for the experimental
procedure are as follows;
1) Cement- Cement is the most important ingredient
which determines the fresh & hardened properties of
concrete. Ordinary Portland cement of 43 grade (sp
gravity-3.15)confirming to IS 12269-1987 is used in this
experimental program.
2) Fine aggregates - The aggregates which are passing
through 4.75mm size IS sieve and contains only that much
of coarse grained materials as permitted by the
specifications are generalized as fine aggregates. Fine
aggregates confirming to zone II passing through 4.75mm
IS sieve (sp gravity-2.52) is used in this experimental
program.
3) Coarse aggregates: The aggregates which are retained
on4.75mm size IS sieve and contains only finer materials
are generalized as coarse aggregates. Coarse aggregates
Passing through 12mm sieve and retained on 10mm sieve
(spgravity-2.63) are used in this experimental program.
4) CINDER: Cinder is a naturally occurring light weight
rock(sp gravity-1.512) of igneous origin. It is a pyroclastic
material which is similar to that of pumice and has many
cavities.
4. METHODOLOGY
The raw materials are firstly cleaned such that it should be
free from impurities and then they are subjected to the
basic tests. Based on the appropriate water cement ratio
the mix designs are obtained for M30 grade concrete as
per the codal provisions. For the obtained mix design the
lightweight aggregates such as CINDER are partially
replaced in place of conventional aggregates with various
percentages. The fresh concrete, slump test is carried for
each proportion. For each proportioned percentage the
cubes and cylinders are casted in order to determine
hardened properties of concrete. The above specimens are
kept for curing for 28days and then the test results are
determined. The above process is carried for the M30
grade of conventional concrete. After testing the light
weight aggregate concrete the proportion at which
optimum strength obtained is determined. Further the
optimum light weight aggregate concrete is compared
with that of conventional grade concrete, so that the
amount of strength gained with respect to normal
conventional concrete is determined.
5. EXPERIMENTAL ANALYSIS:
The fresh and hardened properties of concrete are
determined by various tests as follows;
A) Test on fresh concreter:
1)slump test
B) Test on hardened concrete:
1) Compression strength test.
2) Split tensile test.
SLUMP TEST
The slump test is carried out in order to determine the
workability of concrete. Slump test is carried out for
various proportions of light weight concrete and the test
results shown in graph 1 as follows
Graph1: comparison of aggregate proportion (%) verses
slump (mm) for M30 grade concrete mixes.
From the above slump values it is observed that the slump
goes on increasing up to 40% replacement of cinder and
60% replacement of coarse aggregate. Further the values
of the slump goes on decreasing till the last proportion,
therefore from the graph it is analysed that the slump is
highest for the 40% cinder and 60% coarse aggregate
replacement proportion.
COMPRESSION STRENGTH TEST
The cubes of 150x150x150mm are casted by varying the
proportions of leca and cinder for both M30 grade
concrete mixes. The results obtained are tabulated for the
curing period of 7 days, 28 days as shown below in graph
2
100 80 60 40 20 0
0 20 40 60 80 100
M30 29 37 51 43 37 31
0
10
20
30
40
50
60
SLUMP(MM)
AGGREGATE PROPORTION
M30
C.A
CINDER

Graph 2: comparison of aggregate proportion (%) verses
compressive strength for M30 grade concrete mixes
The compression test results which are obtained are
plotted in graph 2, with compressive strength along y axis
and the aggregate proportions along x axis.
With 0% replacement of cinder and 100% replacement of
coarse aggregate, compressive strength for M30 is 32.86
for 28 days curing period and 7 days curing period
compressive strength is 24.16.Variation in the strength is
observed consecutively in same extent as the aggregate
proportions are varied. From the above compression test
values it has been observed that the strength goes on
decreasing from the first proportion to the last in a
gradual sense.
SPLIT TENSILE TEST:
The cylinders of 300X150mm are casted by varying the
proportions of coarse aggregate and cinder for M30 grade
concrete mixes. The results obtained are shown
graphically for the curing period of 28 days and 7 days as
shown below
Split tensile test is carried out for the M30 grade by
varying the aggregate proportions. From the obtained
results; the graph is plotted with split tensile strength
along y axis and aggregate proportions along x axis.
split tensile strength for M30 grade concrete mixes.
The graph shows the results of split tensile strength for
7days and 28 days of curing period with respect to the
variation in the aggregate proportion for M30 grade of
concrete. It can be observed that, strength value increases
with respect to increase in curing period. That is with 0%
cinder and 100% coarse aggregates the value of split
tensile strength for 7 days of curing period is 2.13 N/mm2,
and for 28 days of curing period it is found to be 2.6
N/mm2. It is also observed that, the split tensile strength is
found to be varying in a detrimental way with the
variation in the aggregate proportion. That is, with 20%
replacement of cinder and 80% of coarse aggregate, the
value of split tensile strength for 28 days of curing is found
to be 2.55 N/mm2.whereas with 40% replacement of
cinder and 60% of coarse aggregate the value of split
tensile strength is found to be 2.46 N/mm2.This may be
due to the reason that, the specific gravity of cinder is less
than that of the coarse aggregate.
FLEXURAL STRENGTH TEST:
Experiments were also conducted to study the behavior of
cinder as coarse aggregate subjected to flexural strength
test for M30 grade concrete for 7 and 28 days curing
period
Split tensile test is carried out for the M30 grade by
varying the aggregate proportions. From the obtained
results; the graph is plotted with split tensile strength
along y axis and aggregate proportions along x axis.
100 80 60 40 20 0
0 20 40 60 80 100
7 days 24.16 23.056 21.885 16.099 14.152 13.298
28 days 32.86 31.08 29.924 23.379 21.491 20.05
0
5
10
15
20
25
30
35
COMPRESSIVESTRENTH
7 days
28 days
C.A
CINDER
100 80 60 40 20 0
0 20 40 60 80 100
7 DAYS 2.13 2.02 1.85 1.49 1.15 0.93
28 DAYS 2.6 2.55 2.46 1.97 1.43 1.22
0
0.5
1
1.5
2
2.5
3
SPLITTENSILESTRENTH
7 DAYS
28 DAYS
C.A
CINDER

flexural strength for M30 grade concrete mixes.
It is observed from the graph 6.4. that, for 0%
replacement of cinder and 100% of coarse aggregate the
flexural strength value for 7 days of curing period is
3.513N/mm2, and for 28 days it is 4.334N/mm2.Similarly
for 20% cinder and 80 % coarse aggregate the flexural
strength value for 7 days of curing period is 3.361N/mm2
and for 28 days it is 4.185N/mm2.This shows that
decrease in flexural strength is observed till the last
proportion that is 100% cinder and 0% coarse aggregate.
It is observed that, the values of flexural strength are
found to be increased with respect to increase in the
curing period. This may be due to the reason that, as the
curing period of concrete increases, the strength also
increases. From the graph it is also observed that as the
value of flexural strength decreases with the variation of
aggregate proportion in a gradual sense, this may be due
to the reason that the coarse aggregate is strong enough
and have high specific gravity when compared to cinder.
Hence with the increase in the cinder content and
decrease in the coarse aggregate content will result in
decrease in the value of flexural strength of concrete.
Results are observed in case of M30 grade concrete also
and the same is presented in graph
6. CONCLUSIONS
From the limited experimental study of the following
conclusions are seem to be valid:
1. The slump value is found to increase gradually until
the(40%,60%) cinder and coarse aggregate proportions,
and thereafter the slump goes on decreasing gradually.
Therefore with 40%replacement of cinder and 60% of
coarse aggregate the better workability are obtained for
the both concrete mixes.
2. From the study it is concluded that the cube
compressive strength is decreased continuously with the
increase in percentage of cinder and also the percentage of
decrease in cube compressive strength is increased
continuously with increasing cinder. However even with
40% replacement of conventional aggregate by cinder
aggregate optimum target mean strength of concrete is
achieved.
3. From the study it is concluded that the cylinder
compressive strength is decreased continuously with the
increase in percentage of cinder and also the percentage of
decrease in cylinder compressive strength is increased
continuously with increasing cinder.
4. From the study it is concluded that the split tensile
strength is decreased continuously with increase in
percentage of cinder and also the percentage of decrease
in split tensile strength is increased continuously with
increasing cinder.
5. From the study it may be concluded that the young’s
modulus have decreased continuously with the increase in
percentage of cinder
REFERENCES
[1] Clarke, J.L. Design Requirements. Structural Light
weight Aggregate Concrete, Chapman & Hall, London, pp.
45-74, 1993.
[2] Thorenfeldt, E., Design Criteria of Light weight
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Norway, pp. 720- 732, 1995.
[3] Bryan, Dennis. S. P, “Occurrence and uses of natural
lightweight aggregate in the Western United States”,
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1989, pp. 89-193.
[4] P.S. Raghuprasad, R. Satish, D.B. Nirmala, A.V. Pradeep
kumar, “Experimental investigation on solid concrete
blocks with partial replacement of coarse aggregate with
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[5] M. A. Caldarone and R. G. Burg , “Development of very
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[6] Watkins, J. and Liu, K.L.W., “A Finite Element Study of
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0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
100 80 60 40 20 0
0 20 40 60 80 100
FLEXURALSTRENTH
AGGREGATE PROPORTION (%)
7 days
28 days
C.A
CINDER

[8] N. Siva lingaRao, G. VenkataRamana, V. Bhaskar Desai,
B. L.P. Swamy, “Properties of lightweight aggregate
concrete with cinder and silica fume admixture”,
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[7] IS. 383-1970 is used for Specification for Coarse and
Fine Aggregate Natural sources for concrete, 1970
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Concrete, 1999.
AUTHORS
First Author – Dr. V.Bhaskar Desai, Professor, Dept. of
Civil Engineering, JNTUA College of Engineering,
Anantapuramu – 515002, A.P.
Second Author – Mr. A. Sathyam, Conservation Assistant
Gr-I, Archaeological Survey of India, Anantapuramu Sub
Circle, Anantapuramu & Research Scholar, JNTUA College
of Engineering, Anantapuramu – 515002, A.P.

IRJET- Experimental Investigation on Concrete by Partial Replacement of Coarse Aggregate by Cinder.

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IRJET- Experimental Investigation on Concrete by Partial Replacement of Coarse Aggregate by Cinder.