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P.Sateesh kumar et al .Int. Journal of Engineering Research and Applications www.ijera.com
ISSN: 2248-9622, Vol. 5, Issue 11, (Part - 4) November 2015, pp.39-46
www.ijera.com 39 | P a g e
Study on Behaviour of Concrete Mix Replaceing Fine Aggregate
With Steel Slag At Different Properties
P.Sateesh Kumar1
, VVS. Sarma2
, N.Vidya Sagar Lal3
1
P.G. Student, Department of Civil Engineering, Gokul institute of technology, pirdi,
bobbili,vizianagaram,Andhra Pradesh, India 2
Assistant Professor, Department of Civil Engineering, Vishnu
institute of technology, vishnupur, bhimavaram,Andhra Pradesh, India , 3
Assistant professor, department of
civil engineering, gokul institute of technology, piridi, bobbili, vizianagaram, Andhra Pradesh,india.
Abstract
This paper aims to study experimentally, the effect of partial replacement of fine aggregate by steel slag (ss), on
the various strength and durability properties of concrete by using the mix designs .the optimum percentage of
replacement of fine aggregate by steel slag is found. Workability of concrete gradually decreases, as the
percentage of replacement increases which is found using slump test. Compressive strength, tensile strength,
flexural strength and durability tests such as acid resistant’s, using HCL,H2SO4 and rapid chloride penetration,
are experimentally investigated.
The results indicate that for conventional concrete, partial replacement of concrete by steel slag improves the
compressive, tensile, flexural strength. The mass loss in cubes after immersion in acids is found to be very low.
Deflection in the RCC beams gradually increases, as the load on the beam increases, for the replacement. The
degree of fluoride ion penetrability is assessed based on the limits given in ASTM C 1202. The viability of use
of steel slag in concrete is found.
Waste management is one of the most common and challenging problems in the world. The steel making
industry has generated substantially solid waste. Steel slag is a residue obtained in steel making operation. This
paper deals with the implementation of steel slag as an effective replacement for sand. Steel slag ,which is
consider as the solid waste pollutant, can be used for road construction ,clinker raw materials, filling materials
etc. In this work, steel slag used as replacement for sand, which is also major component concrete mixture. This
method can be implement for producing hallow blocks, solid blocks, paver blocks, concrete structures etc.
Accordingly, advantages can be achieved by using steel slag instead of natural aggregates this will also
encourage other researchers to find another field of using steel slag.
Keywords: Steel slag; replacement; durability; rapid chloride permeability.
I. INTRODUCTION
Concrete is the most widely used material on
earth after water. Many aspects of our daily life
depend directly or indirectly on concrete. Concrete is
prepared by mixing various constituents like cement,
aggregates, water, etc. which are economically
available. Concrete is unique among major
construction materials because it is designed
specifically for particular civil engineering projects.
Concrete is a composite material composed of
granular materials like coarse aggregates embedded
in a matrix and bound together with cement or
binder which fills the space between the particles
and glues them together.
Concrete plays a critical role in the design and
construction of the nation’s infrastructure. Almost
three quarters of the volume of concrete is composed
of aggregates. To meet the global demand of
concrete in the future, it is becoming a more
challenging task to find suitable alternatives to
natural aggregates for preparing concrete.
The fine aggregates fraction is that passing the 4.75
mm sieve and retained on the 75μ sieve. According
to some estimates after the year 2010, the global
concrete industry will require annually 8 to 12
billion metric tons of natural aggregates. “During the
past 25 years, the production of crushed stone has
increased at an average annual rate of about 3.3
percent. Production of sand and gravel has increased
at an annual rate of less than 1 percent. Production
of crushed stone, which is expected to increase by
more than 20 percent, will be about 1.6 billion
metric tons, while production of sand and gravel will
be just under 1.1 billion metric tons, an increase of
14 percent. In essence the amount of crushed stone
to be produced in the next 20 years will equal the
quantity of all stone produced during the previous
century i.e. about 36.5 billion metric tons.”Therefore
the use of alternative sources for natural aggregates
is becoming increasingly important.
Steel slag:- Slag is a by-product generated during
manufacturing of pig iron and steel. It is produced
by action of various fluxes upon gangue materials
RESEARCH ARTICLE OPEN ACCESS
P.Sateesh kumar et al .Int. Journal of Engineering Research and Applications www.ijera.com
ISSN: 2248-9622, Vol. 5, Issue 11, (Part - 4) November 2015, pp.39-46
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within the iron ore during the process of pig iron
making in blast furnace and steel manufacturing in
steel melting shop. Primarily, the slag consists of
calcium, magnesium, manganese and aluminum
silicates in various combinations. The cooling
process of slag is responsible mainly for generating
different types of slags required for various end-use
consumers. Although, the chemical composition of
slag may remain unchanged, physical properties
vary widely with the changing process of cooling.
The blast furnace (BF) is charged with iron ore,
fluxing agents (usually limestone and dolomite) and
coke as fuel and the reducing agent in the production
of iron. The iron ore is a mixture of iron oxides,
silica, and alumina. From this and the added fluxing
agents, alkaline earth carbonates, molten slag, and
iron are formed. Oxygen in the preheated air blown
into the furnace combines with the carbon of the
coke to produce the needed heat and carbon
monoxide. At the same time, the iron ore is reduced
to iron, mainly through the dioxide. The oxides of
calcium and magnesium combine with silica and
alumina to form slag. The reaction of the carbon
monoxide with the iron oxide yields carbon dioxide
(CO2) and metallic iron. The fluxing agents
dissociate into calcium and magnesium oxides and
carbon dioxide. The oxides of calcium and
magnesium combine with silica and alumina to form
slag
Production of steel calls for the removal of excess
silicon by mineralization and of carbon by oxidation
from pig or crude iron. Steel slag is a hard, dense
material somewhat similar to air-cooled iron slag. It
contains important amounts of free iron, giving it its
high density and hardness, which make it
particularly suitable as a road construction
aggregate. Slag is transported to processing plants,
where it undergoes crushing, grinding, and screening
operations to meet various use specifications.
Processed slag is either shipped to its buyer for
immediate use or, in slack seasons, stored.
II. LITRATURE REVIEW
Compressive strength
 Monshi and Asgarani (1999) producing
Portland cement from iron and steel slags after
magnetic separation are mixed with limestone
of six different compositions. Samples with
higher lime saturation factor developed higher
C3S content and better mechanical properties.
Blending 10% extra iron slag to a cement
composed of 49% iron slag, 43% calcined
lime, and 8% steel slag kept the compressive
strength of concrete above standard values for
type I ordinary Portland cement. From the six
different mixtures of limestone, blast-furnace
slag, and converter slag, samples M3, M5, and
M6 showed relatively good mechanical
properties. Cement M3 was blended with 10%
iron slag as in the Portland blast furnace
cement, and compressive strengths of 140.3,
193.8, 333.3 kg/cm2 were obtained after 3, 7,
and 28 days, respectively. The bare minimum
compressive strength of concrete for type I
Portland cement according to ASTM C150-86
for 3, 7, and 28 days are 12, 19, and 28 MPa,
respectively (about 120, 190, and 280 kg/cm2).
 Ameri et al. (2012) used the steel slag from
Zob-Ahan steel production factory in concrete.
Here placed natural aggregates from the steel
slag and performed compressive strength tests
on samples containing slag ratios of 0, 25, 50,
75 and 100 % and cement contents of concrete
200, 300 and 350 kg/m3. According to his
results, compressive strength improves with
the increase in steel slag ratio up to 25% but
after that increasing the steel slag ratio above
25% decreases compressive strength. The
maximum compressive strength value occurs at
25% slag ratio.
Split tensile strength:-
 Aldea et al. (2000) studied the effects of curing
conditions on properties of concrete by partial
replacement of slag. He replaced 0% slag
(control), 25% slag, 50% slag, and 75% slag
with the cement. The specimen size 75 × 75
mm was used according to ASTM C 496-90.
There is small effect of slag replacement up to
50% upon strength, whereas higher
replacement results in a fall in compressive
strength. The 25% and 50% slag replacement
have a valuable effect compared to control, as
tensile strength increases for all the curing
types. The 50% slag replacement provides
tensile strength to some extent higher to no
slag replacement, whereas the 75% slag
replacement reduces the tensile strength
regardless of the curing type used
Durability characteristics:-
 Veiga and Gastaldini (2012) studied the
sulfate resistance of a white Portland cement
(WPC)containing 0%, 50% or 70% granulated
blast-furnace slag as a partial cement
replacement. The piece of the blended cements
was monitored by exposing the prepared
mortar specimens to a 5% Na2SO4 solution for
two years according to ASTM C1012/04. He
observed that the slag in the partial cement
replacement benefits in both cements and an
increase in its percentage increased sulfate
resistance. For long-term exposure, all of the
WPC blends showed a smaller amount of
expansion than the corresponding blends with
PC. After 24 months of exposure to a sodium
sulfate solution, WPC established higher
resistance to sodium sulfate attack than grey
P.Sateesh kumar et al .Int. Journal of Engineering Research and Applications www.ijera.com
ISSN: 2248-9622, Vol. 5, Issue 11, (Part - 4) November 2015, pp.39-46
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Portland cement and this was maybe due to the
lower CH content of the WPC hydrated paste.
When the slag replacement level was higher,
the expansion values were lower in ASTM
C1012 test due to dilution effect and
pozzolanic reactions that consume CH and
density the matrix. All of the mortar mixtures
containing white Portland cement exhibited
enhanced resistance to sulfate attack than the
corresponding grey Portland cement mortars.
There could have been a balancing effect
between the slag and the limestone used as
filler in the WPC
III. MATERIALS AND PROPERTIES
The materials used in research are:-
1. Ordinary Portland cement (43 grade)
2. Fine aggregate (4.75 mm down)
3. Coarse aggregate (20 mm down)
4. Steel slag
5. Water
6. Admixtures
Cement:- Ordinary Portland cement of 43 grade
(JP) was used in the experiment. The details of tests
conducted on cement are described below
a)Specific gravity of cement:- Specific gravity of
the cement is calculated by using density bottle
method.
Cement specific gravity: 3.15
b) Fineness test on cement:-Fineness test on cement
can be calculated by sieve test or air permeability
method, in commercial cement it is suggested that
there should be about 25 to 30% of particles less
than 7 microns in size.
Fineness of test cement: 92%
c) Initial and final setting time on cement:-Initial
and final setting time on cement is obtained by
vicat’s apparatus, for the initial setting time of the
cement vicat’s needle should penetrate to a depth of
33 to 35 mm from the top, for final setting time the
vicat’s needle should pierce through the paste more
than 0.5mm.We need to calculate the initial and final
setting time as per IS:4031 (Part 5) –1988.
Initial setting time of test cement: 90mins
Final setting time of test cement: 3hrs 30mins (210
mins)
d) Standard consistency test:- The standard
consistency test of a cement paste is defined as that
consistency which will permit vicat’s plunger having
the 10mm diameter and 50mm length to penetrate to
a depth of 33 to 35 from the top of the mould. The
basic aim to find out the water content required to
produce a cement paste of standard consistency as
specified by the IS: 4031( Part4 )-1988.
Standard consistency of test cement : 33%
Fine aggregate:- Aggregates smaller than 4.75mm
and upto 0.075 mm are considered as fine aggregate.
The details of test conducted on fine aggregate are
described below.
a)Specific gravity:- The specific gravity of fine
aggregate is 2.64
b) Fineness modulus:- The standard definition of
fineness modulus is as follows “ An empirical factor
obtained by adding the total percentages of a sample
of the aggregate retained on each of a specified
series of sieves, and dividing the sum by 100.”
Sieve analysis helps to determine the particle size
distribution of the coarse and fine aggregates. This is
done by sieving the aggregates as per IS: 2386 (
Part1)-1963.
Properties of Fine aggregate
Properties
Test
values
Specific gravity
2.64
Bulk density
(gm/cc) 1.68
Fineness
modulus 2.66
Coarse aggregate:- Aggregates greater than
4.75mm are considered as Coarse aggregate.
Properties of Coarse aggregate
Properties
Test
values
Specific gravity 2.76
Bulk density
(loose)(gm/cc)
1.38
Bulk density
(compacted)
(gm/cc)
1.53
Steel Slag:- The properties of Steel slag used in
project are:
Properties of Steel slag:-
Properties
Test
values
Specific gravity 2.72
Bulk density
(loose)(gm/cc) 1.64
Bulk density
(compacted) (gm/cc) 1.89
EXPERIMENTAL PROGRAMME
Tests for workability:-
Slump cone test:- Slump cone test is a very
common test for determination of workability of
concrete. This test was carried out for M25, before
casting the specimens.
b) Compaction factor test:- This test is more
accurate than slump cone test and this test is used to
determine the workability of low water cement ratio
P.Sateesh kumar et al .Int. Journal of Engineering Research and Applications www.ijera.com
ISSN: 2248-9622, Vol. 5, Issue 11, (Part - 4) November 2015, pp.39-46
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more accurately. This test is conducted as per
IS:1199 -1959.
IV. RESULTS AND DISCUSSION
Slump cone test:-
The Variation of slump with increase in percentage
of steel slag 0%, 10%, 20%, 30%, 40%, 50% are
tabulated and the graph is plotted below.
Workability in terms of Slump Cone test
SI. No Description Slump (mm)
1 Plain concrete 55
2 Steel slag 10% 58
3 Steel slag 20% 63
4 Steel slag 30% 67
5 Steel slag 40% 70
6 Steel slag 50% 65
Variation of Slump
Description of result: From Fig The variation of
slump for the partial replacement of Fine aggregate
with Steel slag increased in the order of 55, 58, 63,
67, and70mm for 0%, 10%, 20%, 30% and 40%
proportions and decreased by 65 mm for 50%
replacements respectively.
Compressive strength test:-
Concrete cubes of size 150mmx150mm were casted
for 0%, 10%, 20%, 30%, 40%, 50% steel slag
replacement. The compressive strength for M25
grade is tested for 7 and 28 days of curing and the
results are tabulated and plotted below.
Compressive strength with different replacement
percentages of Steel slag
Compressive strength of concrete by partial
replacement of sand with Steel slag
Description of result:
 From above graph The compressive
strength of concrete is increased gradually
from 0% to 30% and attained a maximum
value at a replacement of 40% Steel slag in
fine aggregate, while compared with
controlled specimen.
 The compressive strength of concrete is
decreased for 50% replacement of slag.
 However compressive strength of concrete
for the partial replacement of Fine
aggregate with Steel slag of 50% does not
decrease by control mix.
Split tensile strength test:- Concrete cylinders of
size 150mmx300mm were casted for 0%, 10%,
20%, 30%, 40%, 50% replacement of steel slag. The
split tensile strength for M25 grade is tested for 7
and 28 days of curing and the results are tabulated
and plotted below.
Split Tensile strength with different
replacement percentages of Steel slag
0
10
20
30
40
50
60
70
80
o% 10%
slag
20%
slag
30%
slag
40%
slag
50%
slag
Slump(mm)
Sand replacement with steel slag in %
M25
0
10
20
30
40
50
0%
10%
20%
30%
40%
50%
Compressivestrength
N/mm2
Sand replacement with steel…
7 Days
28 Days
% of Steel
Slag
replacement
Average 7
Days
compressive
strength
(N/mm2
)
Average 28
Days
compressive
strength
(N/mm2
)
0% 20.36 32.07
10% 22.8 34.66
20% 23.16 36.10
30% 24.73 37.95
40% 26.8 40.79
50% 24.14 35.25
P.Sateesh kumar et al .Int. Journal of Engineering Research and Applications www.ijera.com
ISSN: 2248-9622, Vol. 5, Issue 11, (Part - 4) November 2015, pp.39-46
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Split Tensile strength of concrete by partial
replacement of sand with Steel slag
Description of result:
 From above the Graph The Split tensile
strength of concrete is increased gradually
from 0% to 30% and attained a maximum
value at a replacement of 40% Steel slag in
fine aggregate, while compared with
controlled specimen.
 The Split tensile strength of concrete is
decreased for 50% replacement of slag.
 However Split tensile strength of concrete
for the partial replacement of Fine
aggregate with Steel slag of 50% does not
decrease by control mix.
Flexural strength test:- Concrete prisms of size
500mmx100mmx100mm were casted for 0%, 10%,
20%, 30%, 40%, 50% replacement of steel slag. The
Flexural strength for M25 grade is tested for 7 and
28 days of curing and the results are tabulated and
plotted below.
Flexural strength with different replacement
percentages of Steel slag
% of Steel
Slag
replacement
Average 7
Days
Flexural
strength
(N/mm2
)
Average
28 Days
Flexural
strength
(N/mm2
)
0% 4.72 5.85
10% 4.75 5.90
20% 4.82 6.08
30% 5.51 6.3
40% 5.67 6.84
50% 5.01 6.34
Flexural strength of concrete by partial
replacement of sand with Steel slag
Description of result:-
 From above graph The Flexural strength of
concrete is increased gradually from 0% to
30% and attained a maximum value at a
replacement of 40% Steel slag in fine
aggregate, while compared with controlled
specimen.
 The Flexural strength of concrete is
decreased for 50% replacement of slag.
 However Flexural strength of concrete for
the partial replacement of Fine aggregate
with Steel slag of 50% does not decrease by
control mix.
Stress – Strain Curve:- A typical stress and strain
of concrete in compression are tabulated and plotted
below. The relation is fairly linear in the initial
stages but subsequently becomes non linear reaching
a maximum value before concrete fails. The curve is
usually obtained by testing a cylinder with a height-
to-lateral dimension ratio of at least 2, the test being
conducted under uniform rate of strain. If a uniform
rate of strain is adopted, it will not be possible to
obtain the descending portion of stress and strain
curve beyond the maximum stress.
0
1
2
3
4
5
0% 10% 20% 30% 40% 50%
Splittensilestrengthin
N/mm2
Sand replacement with steel slag in %
7 Days
28 Days
0
2
4
6
8
0% 20% 40%
Flexuralstrengthin
N/mm2
Sand replacement with…
7 Days
28 Days
% of Steel
Slag
replacement
Average 7
Days Split
tensile
strength
(N/mm2
)
Average 28
Days Split
tensile
strength
(N/mm2
)
0% 2.22 3.43
10% 2.4 3.89
20% 2.51 4.12
30% 2.63 4.22
40% 3.29 4.5
50% 2.92 3.9
P.Sateesh kumar et al .Int. Journal of Engineering Research and Applications www.ijera.com
ISSN: 2248-9622, Vol. 5, Issue 11, (Part - 4) November 2015, pp.39-46
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Below graph shows the stress-strain behavior of
concrete for 0% to 50% steel slag replacement.
Stress-Strain curve of concrete for various
percentages of Steel slag
Description of result:-
 The stress and strain increases gradually with
increase in load upto the breaking point. From
Fig it has been observed that the stress-strain
curve for 0% conventional concrete and 40%
Steel slag replaced concrete is similar
Effects of HCL acid on 0% (normal)
concrete and steel slag concrete- Durability
studies:- Concrete cubes of size
150mmx150mm were casted for 0%, 10%,
20%, 30%, 40%, 50% steel slag replacement.
The cubes were casted and cured in water for
28 days and exposed to HCL of 0.5% and 1%
concentrations. Cubes are immersed in
solution after 28 days curing, and are tested
for compressive strength after a further period
of 28 and 56 days. The results are tabulated
below and the graphs are plotted.
Compressive strength of concrete cubes
after immersion in 0.5% HCL solution
Compressive strength of concrete cubes
after immersion in 0.5% HCL
Description of result:-
 From Fig , it is observed that the
compressive strength of concrete is
decreasing when compared to control mix
after immersing the cubes in 0.5%HCL
solution
 However there is an increase in strength for
the 40% replacement of Steel slag but
slightly less than the strength compared to
conventional concrete 0%.
 By observing the results of compressive
strength of 0.5%HCL solution for 28 and
56 days it is observed that the strength loss
will be much larger if the concrete is
immersed in the solution for a longer period
of time. So 40% slag is optimum from the
consideration of resistance to sulphate
0
5
10
15
20
25
0 0.5 1 1.5 2
Stress
Strainx10-3
0%
10%
20%
30%
40%
50%
0
10
20
30
40
50
0%
10%
20%
30%
40%
50%
Compressivestrength
N/mm2
Sand replacement with steel slag
in %
Control(28day
s)
Immersed(28d
ays)
Immersed(56d
ays)
% of Steel
Slag
replacement
28 Days Compressive
strength
56 Days Compressive
strength
Control
28 days
Immersed
0.5%HCL
Control
28days
Immersed
0.5% HCL
32.07 46.3 32.07 43.9
0% 42.09 34.66 39.4
20%
10
%
39.91 36.10 35.06
30% 37.95 39 37.95 34.22
40% 40.79 45.56 40.79 43.31
50% 35.25 34 35.25 30.04
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attack as observed form the experimental
results.
Resistance to sulphate attack of concrete (mgso4)
-Durability studies:- Concrete cubes of size
150mmx150mm were casted for 0%, 10%, 20%,
30%, 40%, 50% steel slag replacement. The cubes
were casted and cured in water for 28 days.
Magnesium sulphate (MgSO4) solution of 50g/l and
Sodium sulphate (Na2SO4) solution of 50g/l is used
to evaluate sulphate resistance of concrete. Cubes
are immersed in solution after 28 days curing, and
are tested for compressive strength after a further
period of 28 and 56 days. The cubes are tested for
compressive strength and any reduction or change is
noted. The compressive strength test results on
immersed cubes specimens are tabulated belows.
Compressive strength of concrete cubes after
immersion in 50gm/litre of MgSo4 solution
Description of result:-
 From Fig it is observed that the
Compressive strength of concrete is
decreasing when compared to control mix
after immersing the cubes in MgSO4 (50g/l)
solution.
 However there is an increase in strength for
the 40% replacement of Steel slag but
slightly less than the strength compared to
conventional concrete 0%.
 By observing the results of compressive
strength of MgSO4 (50g/l) solution for 28
and 56 days it is observed that the strength
loss will be much larger if the concrete is
immersed in the solution for a longer period
of time. So 40% slag is optimum from the
consideration of resistance to sulphate
attack as observed form the experimental
results.
V. CONCLUSIONS
Based on the analysis of experimental results
and discussions there upon the following
conclusions are made.
 The compressive strength, flexural strength
and split tensile strength of normal concrete
and concrete with Steel slag as partial
replacements are compared and observed
that the strength of the normal concrete is
slightly lower than the Steel slag replaced
concrete.
 The compressive strength increases with
increase in percentage of steel slag upto
40% by weight of fine aggregate. The
enhancement in compressive strength is
about 32% for 7 days curing and 27.2% for
28 days curing.
 The split tensile strength increases with
increase in percentage of steel slag upto
40% by weight of fine aggregate. The
enhancement in split tensile strength is
about 48.2% for 7 days curing and 31.2%
for 28 days curing.
 The Flexural strength increases with
increase in percentage of steel slag upto
0
10
20
30
40
50
60
0%
10%
20%
30%
40%
50%
Compressivestrength
N/mm2
Sand relacement with steel slag
in %
Control(28da
ys)
Immersed(28
days)
Immersed(56
days)
% of Steel
Slag
replacement
28 Days Compressive strength 56 Days Compressive strength
Control
28 days
Immersed
MgSO4
Control
28days
Immersed
MgSO4
0% 32.07 49.23 32.07 55.2
10% 34.66 45.62 34.66 53.09
20% 36.10 42.33 36.10 48.09
30% 37.95 39.84 37.95 45.68
40% 40.79 47.42 40.79 53.93
50% 35.25 32.6 35.25 40.42
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40% by weight of fine aggregate. The
enhancement in split tensile strength is
about 20.12% for 7 days curing and 17%
for 28 days curing.
 From the results of compressive strength,
split tensile strength, flexural strength of 7
and 28 days curing, 40% replacement of
fine aggregate by steel slag is the optimum
percentage of replacement of M25 grade
concrete.
 From the Stress-Strain curve (Graph) 40%
Steel slag replaced for M25 concrete is
similar to that of M25 conventional
concrete.
 The compressive strength of concrete is
decreased compared to the control mix
(0%) for all the percentage replacements of
Steel slag but however there is an increase
in strength for 40% replacement of Steel
slag but slightly less than the strength
compared to conventional concrete (0%) for
0.5% and 1% of HCL and MgSO4(50g/l),
Na2SO4(50g/l) at the ages of 28 and 56 days
of strength.
 The following benefits can be obtained by
using Steel slag :- (i)Cost reduction
(ii) Utilization of waste material is possible in
construction by using Steel slag as a partial
replacement material for fine aggregate in concrete.
REFERENCES:-
 TECHNICAL PAPERS
[1.] Aldea C, M., Young F., Wang K., Shah S.
P. (2000). “Effects of curing conditions on
properties of concrete using slag
replacement.” Cement and Concrete Vol.
30 pp 465-472.
[2.] Ameri M., Kazemzadehazad.S. (2012)
“Evalution of the use of steel slag in
concrete”. 25th ARRB Conference –
Shaping the future: Linking policy, research
and outcomes, Perth, Australia.
[3.] A Guide to the Use of Iron and Steel Slag
in Roads. Revision 2, (2002) Published by:
Australasian Slag Association Inc.
[4.] Bakhareva T., Sanjayana J.G., Cheng Y.B.
(2001) “Sulfate attack on alkali-activated
slag concrete.” Cement and Concrete Vol.
32 pp 211-216.
[5.] Bilim C., Atis C. D., Tanyildizi H.,
Karahan O. (2008) “Predicting the
Compressive Strength of Ground
Granulated Blast Furnace Slag Concrete
using Artificial Neural Network”. Advances
in Engineering Software Vol. 40 pp 334–
340.
[6.] Binici H., Temiz H.S., Kose M.M. (2006).
“The effect of fineness on the properties of
the blended cements incorporating ground
granulated blast furnace slag and ground
basaltic pumice.”
[7.] Higgins D.D. (2003). “Increased sulfate
resistance of ggbs concrete in the presence
of carbonate.” Cement and Concrete
Composites Vol. 25 pp 913-919.
[8.] M.Soundar rajan. (2014). “study on
strength properties of concrete by partially
replacement of sand by steel slag.”
International Journal On Engineering
Technology and Sciences Vol 1.
 IS CODES
[9.] IS: 10262-2009 (Reaffirmed 2004):
Recommended guidelines for concrete mix
design, Bureau of Indian Standard, New
Delhi-2004.
[10.] IS: 383-1970: Specification for Coarse and
Fine Aggregates from Natural Sources for
Concrete, Bureau of Indian Standard, New
Delhi-1970.
[11.] IS: 2386 (Part I, III)-1963: Methods of Test
for Aggregates for Concrete, Bureau of
Indian Standard, New Delhi-1963.
[12.] IS: 5816-1999: Methods of test for Splitting
Tensile Strength of Concrete, Bureau of
Indian Standard, New Delhi-1999.
[13.] IS: 516-1959: Indian Standard Methods of
Test for Strength of concrete, Bureau of
Indian Standard, New Delhi-1999.
[14.] IS: 456-2007: Plain and reinforced
Concrete Code of Practice, Bureau of
Indian Standard, New Delhi.
[15.] IS: 4031 (Part 4, 5&6)-1988: Methods of
Physical Tests for Hydraulic Cement,
Bureau of Indian Standard, New Delhi-
1988.
 BIBILOGRAPHY
[16.] M.S. Shetty, “Concrete technology”,
S.Chand & Company ltd, Ram Nagar, New
Delhi,
[17.] Nevelli, “Properties of concrete” longman
publications, New Delhi, Reprint 2010.

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Study on Behaviour of Concrete Mix Replaceing Fine Aggregate With Steel Slag At Different Properties

  • 1. P.Sateesh kumar et al .Int. Journal of Engineering Research and Applications www.ijera.com ISSN: 2248-9622, Vol. 5, Issue 11, (Part - 4) November 2015, pp.39-46 www.ijera.com 39 | P a g e Study on Behaviour of Concrete Mix Replaceing Fine Aggregate With Steel Slag At Different Properties P.Sateesh Kumar1 , VVS. Sarma2 , N.Vidya Sagar Lal3 1 P.G. Student, Department of Civil Engineering, Gokul institute of technology, pirdi, bobbili,vizianagaram,Andhra Pradesh, India 2 Assistant Professor, Department of Civil Engineering, Vishnu institute of technology, vishnupur, bhimavaram,Andhra Pradesh, India , 3 Assistant professor, department of civil engineering, gokul institute of technology, piridi, bobbili, vizianagaram, Andhra Pradesh,india. Abstract This paper aims to study experimentally, the effect of partial replacement of fine aggregate by steel slag (ss), on the various strength and durability properties of concrete by using the mix designs .the optimum percentage of replacement of fine aggregate by steel slag is found. Workability of concrete gradually decreases, as the percentage of replacement increases which is found using slump test. Compressive strength, tensile strength, flexural strength and durability tests such as acid resistant’s, using HCL,H2SO4 and rapid chloride penetration, are experimentally investigated. The results indicate that for conventional concrete, partial replacement of concrete by steel slag improves the compressive, tensile, flexural strength. The mass loss in cubes after immersion in acids is found to be very low. Deflection in the RCC beams gradually increases, as the load on the beam increases, for the replacement. The degree of fluoride ion penetrability is assessed based on the limits given in ASTM C 1202. The viability of use of steel slag in concrete is found. Waste management is one of the most common and challenging problems in the world. The steel making industry has generated substantially solid waste. Steel slag is a residue obtained in steel making operation. This paper deals with the implementation of steel slag as an effective replacement for sand. Steel slag ,which is consider as the solid waste pollutant, can be used for road construction ,clinker raw materials, filling materials etc. In this work, steel slag used as replacement for sand, which is also major component concrete mixture. This method can be implement for producing hallow blocks, solid blocks, paver blocks, concrete structures etc. Accordingly, advantages can be achieved by using steel slag instead of natural aggregates this will also encourage other researchers to find another field of using steel slag. Keywords: Steel slag; replacement; durability; rapid chloride permeability. I. INTRODUCTION Concrete is the most widely used material on earth after water. Many aspects of our daily life depend directly or indirectly on concrete. Concrete is prepared by mixing various constituents like cement, aggregates, water, etc. which are economically available. Concrete is unique among major construction materials because it is designed specifically for particular civil engineering projects. Concrete is a composite material composed of granular materials like coarse aggregates embedded in a matrix and bound together with cement or binder which fills the space between the particles and glues them together. Concrete plays a critical role in the design and construction of the nation’s infrastructure. Almost three quarters of the volume of concrete is composed of aggregates. To meet the global demand of concrete in the future, it is becoming a more challenging task to find suitable alternatives to natural aggregates for preparing concrete. The fine aggregates fraction is that passing the 4.75 mm sieve and retained on the 75μ sieve. According to some estimates after the year 2010, the global concrete industry will require annually 8 to 12 billion metric tons of natural aggregates. “During the past 25 years, the production of crushed stone has increased at an average annual rate of about 3.3 percent. Production of sand and gravel has increased at an annual rate of less than 1 percent. Production of crushed stone, which is expected to increase by more than 20 percent, will be about 1.6 billion metric tons, while production of sand and gravel will be just under 1.1 billion metric tons, an increase of 14 percent. In essence the amount of crushed stone to be produced in the next 20 years will equal the quantity of all stone produced during the previous century i.e. about 36.5 billion metric tons.”Therefore the use of alternative sources for natural aggregates is becoming increasingly important. Steel slag:- Slag is a by-product generated during manufacturing of pig iron and steel. It is produced by action of various fluxes upon gangue materials RESEARCH ARTICLE OPEN ACCESS
  • 2. P.Sateesh kumar et al .Int. Journal of Engineering Research and Applications www.ijera.com ISSN: 2248-9622, Vol. 5, Issue 11, (Part - 4) November 2015, pp.39-46 www.ijera.com 40 | P a g e within the iron ore during the process of pig iron making in blast furnace and steel manufacturing in steel melting shop. Primarily, the slag consists of calcium, magnesium, manganese and aluminum silicates in various combinations. The cooling process of slag is responsible mainly for generating different types of slags required for various end-use consumers. Although, the chemical composition of slag may remain unchanged, physical properties vary widely with the changing process of cooling. The blast furnace (BF) is charged with iron ore, fluxing agents (usually limestone and dolomite) and coke as fuel and the reducing agent in the production of iron. The iron ore is a mixture of iron oxides, silica, and alumina. From this and the added fluxing agents, alkaline earth carbonates, molten slag, and iron are formed. Oxygen in the preheated air blown into the furnace combines with the carbon of the coke to produce the needed heat and carbon monoxide. At the same time, the iron ore is reduced to iron, mainly through the dioxide. The oxides of calcium and magnesium combine with silica and alumina to form slag. The reaction of the carbon monoxide with the iron oxide yields carbon dioxide (CO2) and metallic iron. The fluxing agents dissociate into calcium and magnesium oxides and carbon dioxide. The oxides of calcium and magnesium combine with silica and alumina to form slag Production of steel calls for the removal of excess silicon by mineralization and of carbon by oxidation from pig or crude iron. Steel slag is a hard, dense material somewhat similar to air-cooled iron slag. It contains important amounts of free iron, giving it its high density and hardness, which make it particularly suitable as a road construction aggregate. Slag is transported to processing plants, where it undergoes crushing, grinding, and screening operations to meet various use specifications. Processed slag is either shipped to its buyer for immediate use or, in slack seasons, stored. II. LITRATURE REVIEW Compressive strength  Monshi and Asgarani (1999) producing Portland cement from iron and steel slags after magnetic separation are mixed with limestone of six different compositions. Samples with higher lime saturation factor developed higher C3S content and better mechanical properties. Blending 10% extra iron slag to a cement composed of 49% iron slag, 43% calcined lime, and 8% steel slag kept the compressive strength of concrete above standard values for type I ordinary Portland cement. From the six different mixtures of limestone, blast-furnace slag, and converter slag, samples M3, M5, and M6 showed relatively good mechanical properties. Cement M3 was blended with 10% iron slag as in the Portland blast furnace cement, and compressive strengths of 140.3, 193.8, 333.3 kg/cm2 were obtained after 3, 7, and 28 days, respectively. The bare minimum compressive strength of concrete for type I Portland cement according to ASTM C150-86 for 3, 7, and 28 days are 12, 19, and 28 MPa, respectively (about 120, 190, and 280 kg/cm2).  Ameri et al. (2012) used the steel slag from Zob-Ahan steel production factory in concrete. Here placed natural aggregates from the steel slag and performed compressive strength tests on samples containing slag ratios of 0, 25, 50, 75 and 100 % and cement contents of concrete 200, 300 and 350 kg/m3. According to his results, compressive strength improves with the increase in steel slag ratio up to 25% but after that increasing the steel slag ratio above 25% decreases compressive strength. The maximum compressive strength value occurs at 25% slag ratio. Split tensile strength:-  Aldea et al. (2000) studied the effects of curing conditions on properties of concrete by partial replacement of slag. He replaced 0% slag (control), 25% slag, 50% slag, and 75% slag with the cement. The specimen size 75 × 75 mm was used according to ASTM C 496-90. There is small effect of slag replacement up to 50% upon strength, whereas higher replacement results in a fall in compressive strength. The 25% and 50% slag replacement have a valuable effect compared to control, as tensile strength increases for all the curing types. The 50% slag replacement provides tensile strength to some extent higher to no slag replacement, whereas the 75% slag replacement reduces the tensile strength regardless of the curing type used Durability characteristics:-  Veiga and Gastaldini (2012) studied the sulfate resistance of a white Portland cement (WPC)containing 0%, 50% or 70% granulated blast-furnace slag as a partial cement replacement. The piece of the blended cements was monitored by exposing the prepared mortar specimens to a 5% Na2SO4 solution for two years according to ASTM C1012/04. He observed that the slag in the partial cement replacement benefits in both cements and an increase in its percentage increased sulfate resistance. For long-term exposure, all of the WPC blends showed a smaller amount of expansion than the corresponding blends with PC. After 24 months of exposure to a sodium sulfate solution, WPC established higher resistance to sodium sulfate attack than grey
  • 3. P.Sateesh kumar et al .Int. Journal of Engineering Research and Applications www.ijera.com ISSN: 2248-9622, Vol. 5, Issue 11, (Part - 4) November 2015, pp.39-46 www.ijera.com 41 | P a g e Portland cement and this was maybe due to the lower CH content of the WPC hydrated paste. When the slag replacement level was higher, the expansion values were lower in ASTM C1012 test due to dilution effect and pozzolanic reactions that consume CH and density the matrix. All of the mortar mixtures containing white Portland cement exhibited enhanced resistance to sulfate attack than the corresponding grey Portland cement mortars. There could have been a balancing effect between the slag and the limestone used as filler in the WPC III. MATERIALS AND PROPERTIES The materials used in research are:- 1. Ordinary Portland cement (43 grade) 2. Fine aggregate (4.75 mm down) 3. Coarse aggregate (20 mm down) 4. Steel slag 5. Water 6. Admixtures Cement:- Ordinary Portland cement of 43 grade (JP) was used in the experiment. The details of tests conducted on cement are described below a)Specific gravity of cement:- Specific gravity of the cement is calculated by using density bottle method. Cement specific gravity: 3.15 b) Fineness test on cement:-Fineness test on cement can be calculated by sieve test or air permeability method, in commercial cement it is suggested that there should be about 25 to 30% of particles less than 7 microns in size. Fineness of test cement: 92% c) Initial and final setting time on cement:-Initial and final setting time on cement is obtained by vicat’s apparatus, for the initial setting time of the cement vicat’s needle should penetrate to a depth of 33 to 35 mm from the top, for final setting time the vicat’s needle should pierce through the paste more than 0.5mm.We need to calculate the initial and final setting time as per IS:4031 (Part 5) –1988. Initial setting time of test cement: 90mins Final setting time of test cement: 3hrs 30mins (210 mins) d) Standard consistency test:- The standard consistency test of a cement paste is defined as that consistency which will permit vicat’s plunger having the 10mm diameter and 50mm length to penetrate to a depth of 33 to 35 from the top of the mould. The basic aim to find out the water content required to produce a cement paste of standard consistency as specified by the IS: 4031( Part4 )-1988. Standard consistency of test cement : 33% Fine aggregate:- Aggregates smaller than 4.75mm and upto 0.075 mm are considered as fine aggregate. The details of test conducted on fine aggregate are described below. a)Specific gravity:- The specific gravity of fine aggregate is 2.64 b) Fineness modulus:- The standard definition of fineness modulus is as follows “ An empirical factor obtained by adding the total percentages of a sample of the aggregate retained on each of a specified series of sieves, and dividing the sum by 100.” Sieve analysis helps to determine the particle size distribution of the coarse and fine aggregates. This is done by sieving the aggregates as per IS: 2386 ( Part1)-1963. Properties of Fine aggregate Properties Test values Specific gravity 2.64 Bulk density (gm/cc) 1.68 Fineness modulus 2.66 Coarse aggregate:- Aggregates greater than 4.75mm are considered as Coarse aggregate. Properties of Coarse aggregate Properties Test values Specific gravity 2.76 Bulk density (loose)(gm/cc) 1.38 Bulk density (compacted) (gm/cc) 1.53 Steel Slag:- The properties of Steel slag used in project are: Properties of Steel slag:- Properties Test values Specific gravity 2.72 Bulk density (loose)(gm/cc) 1.64 Bulk density (compacted) (gm/cc) 1.89 EXPERIMENTAL PROGRAMME Tests for workability:- Slump cone test:- Slump cone test is a very common test for determination of workability of concrete. This test was carried out for M25, before casting the specimens. b) Compaction factor test:- This test is more accurate than slump cone test and this test is used to determine the workability of low water cement ratio
  • 4. P.Sateesh kumar et al .Int. Journal of Engineering Research and Applications www.ijera.com ISSN: 2248-9622, Vol. 5, Issue 11, (Part - 4) November 2015, pp.39-46 www.ijera.com 42 | P a g e more accurately. This test is conducted as per IS:1199 -1959. IV. RESULTS AND DISCUSSION Slump cone test:- The Variation of slump with increase in percentage of steel slag 0%, 10%, 20%, 30%, 40%, 50% are tabulated and the graph is plotted below. Workability in terms of Slump Cone test SI. No Description Slump (mm) 1 Plain concrete 55 2 Steel slag 10% 58 3 Steel slag 20% 63 4 Steel slag 30% 67 5 Steel slag 40% 70 6 Steel slag 50% 65 Variation of Slump Description of result: From Fig The variation of slump for the partial replacement of Fine aggregate with Steel slag increased in the order of 55, 58, 63, 67, and70mm for 0%, 10%, 20%, 30% and 40% proportions and decreased by 65 mm for 50% replacements respectively. Compressive strength test:- Concrete cubes of size 150mmx150mm were casted for 0%, 10%, 20%, 30%, 40%, 50% steel slag replacement. The compressive strength for M25 grade is tested for 7 and 28 days of curing and the results are tabulated and plotted below. Compressive strength with different replacement percentages of Steel slag Compressive strength of concrete by partial replacement of sand with Steel slag Description of result:  From above graph The compressive strength of concrete is increased gradually from 0% to 30% and attained a maximum value at a replacement of 40% Steel slag in fine aggregate, while compared with controlled specimen.  The compressive strength of concrete is decreased for 50% replacement of slag.  However compressive strength of concrete for the partial replacement of Fine aggregate with Steel slag of 50% does not decrease by control mix. Split tensile strength test:- Concrete cylinders of size 150mmx300mm were casted for 0%, 10%, 20%, 30%, 40%, 50% replacement of steel slag. The split tensile strength for M25 grade is tested for 7 and 28 days of curing and the results are tabulated and plotted below. Split Tensile strength with different replacement percentages of Steel slag 0 10 20 30 40 50 60 70 80 o% 10% slag 20% slag 30% slag 40% slag 50% slag Slump(mm) Sand replacement with steel slag in % M25 0 10 20 30 40 50 0% 10% 20% 30% 40% 50% Compressivestrength N/mm2 Sand replacement with steel… 7 Days 28 Days % of Steel Slag replacement Average 7 Days compressive strength (N/mm2 ) Average 28 Days compressive strength (N/mm2 ) 0% 20.36 32.07 10% 22.8 34.66 20% 23.16 36.10 30% 24.73 37.95 40% 26.8 40.79 50% 24.14 35.25
  • 5. P.Sateesh kumar et al .Int. Journal of Engineering Research and Applications www.ijera.com ISSN: 2248-9622, Vol. 5, Issue 11, (Part - 4) November 2015, pp.39-46 www.ijera.com 43 | P a g e Split Tensile strength of concrete by partial replacement of sand with Steel slag Description of result:  From above the Graph The Split tensile strength of concrete is increased gradually from 0% to 30% and attained a maximum value at a replacement of 40% Steel slag in fine aggregate, while compared with controlled specimen.  The Split tensile strength of concrete is decreased for 50% replacement of slag.  However Split tensile strength of concrete for the partial replacement of Fine aggregate with Steel slag of 50% does not decrease by control mix. Flexural strength test:- Concrete prisms of size 500mmx100mmx100mm were casted for 0%, 10%, 20%, 30%, 40%, 50% replacement of steel slag. The Flexural strength for M25 grade is tested for 7 and 28 days of curing and the results are tabulated and plotted below. Flexural strength with different replacement percentages of Steel slag % of Steel Slag replacement Average 7 Days Flexural strength (N/mm2 ) Average 28 Days Flexural strength (N/mm2 ) 0% 4.72 5.85 10% 4.75 5.90 20% 4.82 6.08 30% 5.51 6.3 40% 5.67 6.84 50% 5.01 6.34 Flexural strength of concrete by partial replacement of sand with Steel slag Description of result:-  From above graph The Flexural strength of concrete is increased gradually from 0% to 30% and attained a maximum value at a replacement of 40% Steel slag in fine aggregate, while compared with controlled specimen.  The Flexural strength of concrete is decreased for 50% replacement of slag.  However Flexural strength of concrete for the partial replacement of Fine aggregate with Steel slag of 50% does not decrease by control mix. Stress – Strain Curve:- A typical stress and strain of concrete in compression are tabulated and plotted below. The relation is fairly linear in the initial stages but subsequently becomes non linear reaching a maximum value before concrete fails. The curve is usually obtained by testing a cylinder with a height- to-lateral dimension ratio of at least 2, the test being conducted under uniform rate of strain. If a uniform rate of strain is adopted, it will not be possible to obtain the descending portion of stress and strain curve beyond the maximum stress. 0 1 2 3 4 5 0% 10% 20% 30% 40% 50% Splittensilestrengthin N/mm2 Sand replacement with steel slag in % 7 Days 28 Days 0 2 4 6 8 0% 20% 40% Flexuralstrengthin N/mm2 Sand replacement with… 7 Days 28 Days % of Steel Slag replacement Average 7 Days Split tensile strength (N/mm2 ) Average 28 Days Split tensile strength (N/mm2 ) 0% 2.22 3.43 10% 2.4 3.89 20% 2.51 4.12 30% 2.63 4.22 40% 3.29 4.5 50% 2.92 3.9
  • 6. P.Sateesh kumar et al .Int. Journal of Engineering Research and Applications www.ijera.com ISSN: 2248-9622, Vol. 5, Issue 11, (Part - 4) November 2015, pp.39-46 www.ijera.com 44 | P a g e Below graph shows the stress-strain behavior of concrete for 0% to 50% steel slag replacement. Stress-Strain curve of concrete for various percentages of Steel slag Description of result:-  The stress and strain increases gradually with increase in load upto the breaking point. From Fig it has been observed that the stress-strain curve for 0% conventional concrete and 40% Steel slag replaced concrete is similar Effects of HCL acid on 0% (normal) concrete and steel slag concrete- Durability studies:- Concrete cubes of size 150mmx150mm were casted for 0%, 10%, 20%, 30%, 40%, 50% steel slag replacement. The cubes were casted and cured in water for 28 days and exposed to HCL of 0.5% and 1% concentrations. Cubes are immersed in solution after 28 days curing, and are tested for compressive strength after a further period of 28 and 56 days. The results are tabulated below and the graphs are plotted. Compressive strength of concrete cubes after immersion in 0.5% HCL solution Compressive strength of concrete cubes after immersion in 0.5% HCL Description of result:-  From Fig , it is observed that the compressive strength of concrete is decreasing when compared to control mix after immersing the cubes in 0.5%HCL solution  However there is an increase in strength for the 40% replacement of Steel slag but slightly less than the strength compared to conventional concrete 0%.  By observing the results of compressive strength of 0.5%HCL solution for 28 and 56 days it is observed that the strength loss will be much larger if the concrete is immersed in the solution for a longer period of time. So 40% slag is optimum from the consideration of resistance to sulphate 0 5 10 15 20 25 0 0.5 1 1.5 2 Stress Strainx10-3 0% 10% 20% 30% 40% 50% 0 10 20 30 40 50 0% 10% 20% 30% 40% 50% Compressivestrength N/mm2 Sand replacement with steel slag in % Control(28day s) Immersed(28d ays) Immersed(56d ays) % of Steel Slag replacement 28 Days Compressive strength 56 Days Compressive strength Control 28 days Immersed 0.5%HCL Control 28days Immersed 0.5% HCL 32.07 46.3 32.07 43.9 0% 42.09 34.66 39.4 20% 10 % 39.91 36.10 35.06 30% 37.95 39 37.95 34.22 40% 40.79 45.56 40.79 43.31 50% 35.25 34 35.25 30.04
  • 7. P.Sateesh kumar et al .Int. Journal of Engineering Research and Applications www.ijera.com ISSN: 2248-9622, Vol. 5, Issue 11, (Part - 4) November 2015, pp.39-46 www.ijera.com 45 | P a g e attack as observed form the experimental results. Resistance to sulphate attack of concrete (mgso4) -Durability studies:- Concrete cubes of size 150mmx150mm were casted for 0%, 10%, 20%, 30%, 40%, 50% steel slag replacement. The cubes were casted and cured in water for 28 days. Magnesium sulphate (MgSO4) solution of 50g/l and Sodium sulphate (Na2SO4) solution of 50g/l is used to evaluate sulphate resistance of concrete. Cubes are immersed in solution after 28 days curing, and are tested for compressive strength after a further period of 28 and 56 days. The cubes are tested for compressive strength and any reduction or change is noted. The compressive strength test results on immersed cubes specimens are tabulated belows. Compressive strength of concrete cubes after immersion in 50gm/litre of MgSo4 solution Description of result:-  From Fig it is observed that the Compressive strength of concrete is decreasing when compared to control mix after immersing the cubes in MgSO4 (50g/l) solution.  However there is an increase in strength for the 40% replacement of Steel slag but slightly less than the strength compared to conventional concrete 0%.  By observing the results of compressive strength of MgSO4 (50g/l) solution for 28 and 56 days it is observed that the strength loss will be much larger if the concrete is immersed in the solution for a longer period of time. So 40% slag is optimum from the consideration of resistance to sulphate attack as observed form the experimental results. V. CONCLUSIONS Based on the analysis of experimental results and discussions there upon the following conclusions are made.  The compressive strength, flexural strength and split tensile strength of normal concrete and concrete with Steel slag as partial replacements are compared and observed that the strength of the normal concrete is slightly lower than the Steel slag replaced concrete.  The compressive strength increases with increase in percentage of steel slag upto 40% by weight of fine aggregate. The enhancement in compressive strength is about 32% for 7 days curing and 27.2% for 28 days curing.  The split tensile strength increases with increase in percentage of steel slag upto 40% by weight of fine aggregate. The enhancement in split tensile strength is about 48.2% for 7 days curing and 31.2% for 28 days curing.  The Flexural strength increases with increase in percentage of steel slag upto 0 10 20 30 40 50 60 0% 10% 20% 30% 40% 50% Compressivestrength N/mm2 Sand relacement with steel slag in % Control(28da ys) Immersed(28 days) Immersed(56 days) % of Steel Slag replacement 28 Days Compressive strength 56 Days Compressive strength Control 28 days Immersed MgSO4 Control 28days Immersed MgSO4 0% 32.07 49.23 32.07 55.2 10% 34.66 45.62 34.66 53.09 20% 36.10 42.33 36.10 48.09 30% 37.95 39.84 37.95 45.68 40% 40.79 47.42 40.79 53.93 50% 35.25 32.6 35.25 40.42
  • 8. P.Sateesh kumar et al .Int. Journal of Engineering Research and Applications www.ijera.com ISSN: 2248-9622, Vol. 5, Issue 11, (Part - 4) November 2015, pp.39-46 www.ijera.com 46 | P a g e 40% by weight of fine aggregate. The enhancement in split tensile strength is about 20.12% for 7 days curing and 17% for 28 days curing.  From the results of compressive strength, split tensile strength, flexural strength of 7 and 28 days curing, 40% replacement of fine aggregate by steel slag is the optimum percentage of replacement of M25 grade concrete.  From the Stress-Strain curve (Graph) 40% Steel slag replaced for M25 concrete is similar to that of M25 conventional concrete.  The compressive strength of concrete is decreased compared to the control mix (0%) for all the percentage replacements of Steel slag but however there is an increase in strength for 40% replacement of Steel slag but slightly less than the strength compared to conventional concrete (0%) for 0.5% and 1% of HCL and MgSO4(50g/l), Na2SO4(50g/l) at the ages of 28 and 56 days of strength.  The following benefits can be obtained by using Steel slag :- (i)Cost reduction (ii) Utilization of waste material is possible in construction by using Steel slag as a partial replacement material for fine aggregate in concrete. REFERENCES:-  TECHNICAL PAPERS [1.] Aldea C, M., Young F., Wang K., Shah S. P. (2000). “Effects of curing conditions on properties of concrete using slag replacement.” Cement and Concrete Vol. 30 pp 465-472. [2.] Ameri M., Kazemzadehazad.S. (2012) “Evalution of the use of steel slag in concrete”. 25th ARRB Conference – Shaping the future: Linking policy, research and outcomes, Perth, Australia. [3.] A Guide to the Use of Iron and Steel Slag in Roads. Revision 2, (2002) Published by: Australasian Slag Association Inc. [4.] Bakhareva T., Sanjayana J.G., Cheng Y.B. (2001) “Sulfate attack on alkali-activated slag concrete.” Cement and Concrete Vol. 32 pp 211-216. [5.] Bilim C., Atis C. D., Tanyildizi H., Karahan O. (2008) “Predicting the Compressive Strength of Ground Granulated Blast Furnace Slag Concrete using Artificial Neural Network”. Advances in Engineering Software Vol. 40 pp 334– 340. [6.] Binici H., Temiz H.S., Kose M.M. (2006). “The effect of fineness on the properties of the blended cements incorporating ground granulated blast furnace slag and ground basaltic pumice.” [7.] Higgins D.D. (2003). “Increased sulfate resistance of ggbs concrete in the presence of carbonate.” Cement and Concrete Composites Vol. 25 pp 913-919. [8.] M.Soundar rajan. (2014). “study on strength properties of concrete by partially replacement of sand by steel slag.” International Journal On Engineering Technology and Sciences Vol 1.  IS CODES [9.] IS: 10262-2009 (Reaffirmed 2004): Recommended guidelines for concrete mix design, Bureau of Indian Standard, New Delhi-2004. [10.] IS: 383-1970: Specification for Coarse and Fine Aggregates from Natural Sources for Concrete, Bureau of Indian Standard, New Delhi-1970. [11.] IS: 2386 (Part I, III)-1963: Methods of Test for Aggregates for Concrete, Bureau of Indian Standard, New Delhi-1963. [12.] IS: 5816-1999: Methods of test for Splitting Tensile Strength of Concrete, Bureau of Indian Standard, New Delhi-1999. [13.] IS: 516-1959: Indian Standard Methods of Test for Strength of concrete, Bureau of Indian Standard, New Delhi-1999. [14.] IS: 456-2007: Plain and reinforced Concrete Code of Practice, Bureau of Indian Standard, New Delhi. [15.] IS: 4031 (Part 4, 5&6)-1988: Methods of Physical Tests for Hydraulic Cement, Bureau of Indian Standard, New Delhi- 1988.  BIBILOGRAPHY [16.] M.S. Shetty, “Concrete technology”, S.Chand & Company ltd, Ram Nagar, New Delhi, [17.] Nevelli, “Properties of concrete” longman publications, New Delhi, Reprint 2010.