International Journal of Civil Engineering and Technology (IJCIET)
Volume 10, Issue 3, March 2019, pp. 535-538. Article ID: IJCIET_10_03_055
Available online at http://www.iaeme.com/ijciet/issues.asp?JType=IJCIET&VType=10&IType=3
ISSN Print: 0976-6308 and ISSN Online: 0976-6316
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EXPERIMENTAL STUDY ON STRENGTH OF
CONCRETE BY PARTIAL REPLACEMENT OF
FINE AGGREGATE WITH SAW DUST
*R. Chitra, S. Thendral, A. Arunya
Assistant Professor, Department of Civil Engineering, BIST, BIHER,
Bharath University, India.
Dr. S.J. Mohan
Professor, Department of Civil Engineering, BIST, BIHER, Bharath University, India.
*Corresponding Author
ABSTRACT
Abstract-This paper represents the results of the investigation carried out from the
use of saw dust as partial replacement for fine aggregate in concrete.Saw dust is a
waste material obtained from woods or otherwise resulting from the machine
milling.In this fine aggregate was replaced by saw dust as 0%,5%,10%,15% by
weight for M-20 Mix.The results obtained was 15% optimum replacement for
compresssive strength.
Keywords: concrete,saw dust, ordinary portland cement,compressive strength.
Cite this Article: R. Chitra, S. Thendral, A. Arunya and Dr. S. J. Mohan,
Experimental Study on Strength of Concrete by Partial Replacement of Fine
Aggregate with Saw Dust, International Journal of Civil Engineering and
Technology, 10(3), 2019, pp. 535-538.
http://www.iaeme.com/IJCIET/issues.asp?JType=IJCIET&VType=10&IType=3
1. INTRODUCTION
Cement Concrete consists of hard inorganic materials called aggregates such as gravel, sand,
crushed stone, slag etc. cemented together with Portland cement and water. The cement-water
paste has its role to bind the aggregate to form a strong rock like mass after hardening as
consequence of the chemical reaction between cement and water. The cement-water paste
acts as slurry which fills the voids in sand forming mortar. The mortar so formed fills the
voids in the coarse aggregate. When the above materials are mixed together so as to form a
workable mixture and it can be molded or cast. A few hours after mixing, the materials
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535
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Experimental Study on Strength of Concrete by Partial Replacement of Fine Aggregate with Saw
Dust
undergo a chemical combination and as a consequence, the mixture solidifies and hardens,
attaining greater strength with age
2.MATERIALS USED
2.1. Saw Dust
Saw Dust used in this study was collected from local mills. Specific gravity of sawdust is
2.12
Table 1 Chemical properties of saw dust
Oxide
SiO2
Al2O3
Fe2O3
MgO
CaO
PERCENTAGE
69.3
3.6
2.25
5.56
5.02
2.2. Cement
Cement used in this experiment was 43 grade ordinary Portland cement confirming IS8112:89.
Table 2 specific gravity test
Sl.
No
1
2
3
Characteristics
Values
Specific gravity
Normal consistency, percent
Initial setting time, minutes
3.10
35
55
2.3. Fine Aggregate
The fine aggregate used was collected from locally available sites and confirmed into zone-3
of IS 383:1970.
Table 3 Physical properties of Fine Aggregate
Sl.
No
1
2
3
Characteristics
Values
Specific gravity
Fineness modulus
Water absorption
2.45
3.35
105
2.4. Coarse Aggregate
Table 4 Physical properties of Coarse Aggregate
Sl.
No
1
2
3
Characteristics
Values
Specific gravity
Aggregate impact
value,percent
Los Angels,percent
2.71
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536
23.9
12.85
editor@iaeme.com
R. Chitra, S. Thendral, A. Arunya And Dr. S. J. Mohan
3. EXPERIMENTAL PROCEDURE
3.1. Mix Design
M20 grade of concrete was designed for this experiment with mix proportion of 1:1.60:2.78
with water cement ratio 0.45. The concrete mix design has been designed based on IS
10262:2009
Water
Cement
0.45
1
Fine
aggregate
1.60
Coarse
aggregate
2.78
3.2. Batching, Mixing and Casting
The compressive test on a concrete cube were carried out with compressive test machine the
machine automatically stops when failure occurs and then displays the failure load. The test
was done for 7th&28thday.The result was shown in table
4. RESULTS AND DISCUSSIONS
The results of the compressive strength performed on the test samples as presented in the
table:5 with various percentage of saw dust and different number of days for curing.
compressive strength (N/mm2)
Table 5 Compressive Strength of cubes with various percentage of saw dust and days of cure
Cement
grade
% saw
dust
M-20
M-20
M-20
M-20
0
5
10
15
7 days
compressive
strength
(N/mm2)
9.67
11.08
10.98
7.88
28 days
compressive
strength
(N/mm2)
25.41
24.20
23.75
17.54
12
10
8
6
4
2
0
0%
5%
10%
15%
Percentage of Sawdust
Figure 1 Compressive strength of the Cubes for 7 days
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537
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compressive strength
(N/mm2)
Experimental Study on Strength of Concrete by Partial Replacement of Fine Aggregate with Saw
Dust
30
25
20
15
10
5
0
0%
5%
10%
15%
Percentage of Sawdust
Figure 2 compressive strength of cubes for 28 days
1000
5.CONCLUSION
Following points are observed in the current study
 The utilisation of saw dust in concrete provides additional environmental as well as
technical benefits for all related industries
 Partial replacement of saw sawdust reduces the cost of making concrete
 It has been observed that when we increase the saw dust percentage the compressive
strength of the concrete decrease
 Increase in water cement ratio also decrease the compressive strength of the concrete
 Water absorption increased with increasing saw dust percentage
 To achieve a better result sawdust, replace with fine aggregate by 10%
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