International Research Journal of Engineering and Technology (IRJET)
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MECHANICAL BEHAVIOUR OF RECYCLED COARSE AND FINE
AGGREGATE IN CONCRETE.
Mr. V.M. Gnanasundar1, Mr.T.Tamilmaran2, M.Vijayprasath2, R. Nithish Kumar2
1Assistant
Professor, Civil Engineering, Bannari Amman Institute of Technology - Sathy,
Year Student, Dept. of Civil Engineering, BIT - Sathy, Erode, Tamilnadu – 638041.
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Abstract - Concrete is the most broadly utilized development material on the planet. It has been being used in for a
considerable length of time in different sorts of structures because of its flexible nature. Increment popular and diminishes in
the supply of totals for the generation of solid outcome in the need to recognize the new wellspring of the total. Then again,
enormous amounts of structure rubble are squandered every year amid the destruction of old structures to make away for
new and present-day methods because of fast urbanization. Likewise, the transfers of such materials make issues in the
perspective on the shortage of appropriate dumping grounds and meeting natural prerequisites. Squander is one of the
principle challenges in our occasions, so solid waste can be changed over into reusable aggregates. The target of this
undertaking is to exhibit that it is conceivable by methods for utilizing reused materials to fulfill the prerequisites of the
present-day structure without fundamentally impeding the last exhibitions or expanding the expense of development. There
are numerous investigations that demonstrate that solid made with this kind of coarse totals can have mechanical properties
like those of ordinary cement and even high-quality cement is presently days a conceivable objective for this earth sound
practice. This exploratory examination attempts to discover the ideal level of the reused fine total with 100% swap of the
coarse total for M20 blend, Indian standard ostensible blend configuration was utilized. For this blend, quality properties from
compressive quality, split rigidity, modulus of flexibility test and toughness properties from chloride assault, sulfate assault,
and porous test have done. In view of these properties, ideal rates of fines have found.
Keywords:
Recycled materials, Reusable aggregate, High-strength concrete, compressive quality, split rigidity, modulus
of flexibility test.
1. INTRODUCTION
Nature has a method for tidying up some of the chaos by the procedure of biodegradation however at this point
certain items have come up which is nonbiodegradable. One method for decreasing such waste is the procedure reusing
and this is an answer in numerous everyday issues. Because of the expanding urbanization, the regular assets are
exhausting. It is winding up progressively hard to get the great quality total at sensible costs. The expansion in expenses is
principally because of the expense of transportation and because of fewer quarries has been restricted. In the development
business, in urban territories, the pulverization of old structures is on the ascent either on the grounds that they are out of
date, perilous need fix and restoration or else to make a route for fresher, bigger, taller structures accordingly huge, a
measure of destroyed cement is produced as waste. The majority of the destroyed waste is discarded by dumping it as
landfill or for recovering area yet the expense of transportation and the deficiency of dumping grounds makes the transfer
as a noteworthy issue. The best arrangement is reused the wrecked cement. By and by, wrecked cement is being utilized as
a base material in high way development. As a further extension towards the utilization of waste cement the solid rubble is
likewise being utilized as a substitute for a regular total in making new concrete.
2. REASONS TO USE
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




Old structures are old, hazardous, need fix and restoration.
Effective usage of waste materials.
No accessibility of totals.
Minimize the waste amount.
Disposal issue.
As a less expensive exchange to the characteristic total.
To ration the characteristic asset.
3. ADVANTAGE OF RECYCLED CONCRETE AGGREGATE
Reused concrete is being utilized to create totals for
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International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 06 Issue: 03 | Mar 2019
p-ISSN: 2395-0072
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Many sorts of general mass fill;
The base or fill for seepage structures;
Pavement sub bases;
Soil-concrete asphalt bases;
Lean-concrete or solid bases;
Bituminous concrete;
New concrete for asphalts, shoulders, middle boundaries, walkways, controls and drains, building and extension
establishments, and auxiliary evaluation concrete.
4. AIM OF THE INVESTIGATION
 The point of this exploratory examination is to discover the impact of substitution of normal totals by reused totals
and thus to decide the ideal level of RFA as for quality and toughness.
 Natural fine totals are supplanted by reused fine totals in various extents like 15%, 20%, 25%, 30%, 40%, half, 60%,
70%, and 80% and with 100% reused coarse total
.
5. SCOPE OF INVESTIGATION
 To look at the conduct of the solid made with characteristic and reused totals with various extents for M20 blend.
 Mix configuration utilized for M20 blend is ostensible blend structure according to IS 456-2000.
 Recycled coarse total comprise of particles coarser than 4.75 mm and better than 20mm recouped from the
pulverized waste solid utilizing JAW CRUSHER were utilized.
 Recycled fine total comprises of particles whose estimate is littler than 4.75mm recuperated from the squashed
waste cement were utilized.
6. MATERIALS USED AND MIX PROPORTIONING:
Table 1: Properties of Fine and Coarse Aggregates.
Aggregate Type
Coarse Aggregate
Fine Aggregate
Recycled Coarse Aggregate
Recycled Fine Aggregate
Specific gravity
2.73
2.78
2.47
2.34
Water Absorption(%)
0.24
0.40
3.20
4.10
6.1 Constant Parameters:
Type of cement: PPC, ACC Suraksha
Type aggregate: 1) Fine Aggregate <4.75mm, 2) Coarse Aggregate <20 mm
Mix proportioning of concrete: M20, 1:1.67:3.33.
Water/cement: 0.6
6.2 Jaw Crusher
Fig.1. Jaw Crusher
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7. TESTING:
The bond, sand, characteristic and reused totals were dry blended in the extent of 1:1.67:3.33 (which compares to
M20 grade concrete)
Before including the regular totals they were supplanted by reused coarse totals with 100% and Recycled fine total in
various rates like 15%, 20%, 25%, 30%, 35%, 40%, 45%, half, 60%, 70%, 80%.The dry blend is homogeneously blended
with the W/C proportion of 0.6. This homogenous solid blend was put in the molds, which have compacted by utilizing a
vibrating table. The examples were done smooth and taken the following 24 hours, they were demoulded.
Subsequent to demoulding the example were exchanged to the restoring tank, wherein they were permitted to a
solution for 28 days. Following 28 days of relieving they were dried and weighed for their thickness and tried for their
particular qualities.
To discover the compressive quality, penetrability test the 3D shapes of measurements 150×150×150mm were
thrown. To discover the rigidity, compressive quality and modulus of versatility the chambers of measurements 150 mm
distance across, 300 mm tallness were utilized. To discover the loss of weight for chloride assault and sulfate assault test,
100×100×100mm solid shape was thrown.
8. EXPERIMENTAL RESULTS:
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Table 1 and graph 1 gives the outcomes for Compressive quality of 3D shapes at seventh day and 28th day.
Table 2 and outline 2 gives the outcomes for Split tractable and compressive quality of chambers.
Table 3 and outline 3 gives the modulus of the flexibility of cement.
Table 4 and Chart 4, Chart 5 gives the toughness test results.
Table 1: Results of compressive strength
% of Recycled
fine aggregate
Compressive strength of cubes
7th day
28th day
2
(N/mm )
(N/mm2)
19.12
26.82
20.15
28.44
17.40
22.52
13.92
20.44
12.43
18.67
10.67
13.90
11.70
14.20
10.20
13.84
9.75
12.80
15
20
25
30
35
40
50
60
70
Graph. 1: Compressive Strength Test
Compressive Strength
Compressive
Stress(N/mm2)
35
30
25
20
28th day
15
7th day
10
5
0
15
20
25
30
35
40
50
60
Percentage of Fines
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Table 2: Split Tensile Strength and Compressive Strength of Cylinders
S.No
1.
2.
3.
4.
5.
6.
7.
8.
9.
Percentage Fines
%
15
20
25
30
35
40
50
60
70
Split Tensile Strength
N/mm2
2.12
2.20
1.98
1.74
1.69
1.60
1.61
1.54
1.48
Compressive Strength of Cylinder
N/mm2
16.22
16.90
16.96
14.9
12.07
8.87
7.92
8.16
7.80
Graph. 2: Split Tensile Strength and Compressive Strength of Cylinders
Split tensile & compressive strength of Cylinders
18
16
Stress(N/mm2)
14
Split Tensile
Strength
12
10
8
Compressive
Strength of
cylinders
6
4
2
0
0
20
40
60
80
Percentage of Fines
Graph. 3: Modulus of Elasticity Result
Modulus of Elasticity
Modulus of elasticity(N/mm2)
18500
18000
17500
17000
16500
16000
15500
15000
0
20
40
60
percentage of fines
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Table 3: Modulus of Elasticity Result
S.No
1.
2.
3.
4.
5.
6.
7.
% of Recycled fine aggregate
15
20
25
30
35
40
50
Modulus of elasticity
17880.30
17890.02
17811.25
17104.95
16820.12
16231.20
15462.40
Table 4: Durability Test Results
% of Recycled fine aggregate
Weight loss of Cubes
Chloride
Sulphate attack
attack
6.40
0.715
6.20
0.710
6.80
0.740
7.26
0.750
7.40
0.766
7.82
0.792
8.22
0.800
8.68
0.823
8.90
0.850
9.15
0.872
15
20
25
30
35
40
50
60
70
80
Graph. 3: Chloride Attack Results
Chloride Attack
10
9
8
Wt loss in %
7
6
5
4
3
2
1
0
0
20
40
60
Percentage fines
80
100
Graph. 4: Sulphate Attack Results
Sulphate attack
1
0.9
Wt loss in %
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
0
20
40
60
80
100
Percentage Fines
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9. CONCLUSIONS

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
In view of the trial results directed on Recycled Aggregate cement, the accompanying perceptions can be made
and thus a few ends:
Ideal level of compressive quality of 3D shapes, Optimum level of split rigidity and compressive quality of
chambers, Optimum level of modulus of versatility of solid, Optimum level of loss of weight of 3D shapes in
sturdiness test was found for the Concrete created from 15%, 20%, 25%, 30%, 35%, 40%, half, 60%, 70%
substitution of characteristic fine total.
It is reasoned that in light of solidarity and strength qualities the ideal level of the reused fine total is 20%. Past
20% substitution of the normal fine total, quality and sturdiness diminish as the rate supplanting of
characteristic fine totals with reused fine totals increments.
10. REFERENCES
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
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