- Open Access
- Total Downloads : 23
- Authors : Rekha Ambi, Praveen P L
- Paper ID : IJERTCONV3IS29031
- Volume & Issue : NCRACE – 2015 (Volume 3 – Issue 29)
- Published (First Online): 30-07-2018
- ISSN (Online) : 2278-0181
- Publisher Name : IJERT
- License: This work is licensed under a Creative Commons Attribution 4.0 International License
Potential Utilization of Steel and Polypropylene Fibre on Ternary Blended Concrete
Rekha Ambi
Assistant Professor Department of Civil Engineering
TKM College of Engineering Kollam, Kerala, India
Praveen P L
M.Tech Student, Department of Civil Engineering
T.K.M College of Engineering Kollam, Kerala, India
AbstractThe present paper focuses on investigating the characteristics of M30 concrete with addition of Steel and Polypropylene fiber on a ternary blended concrete made out of Ground Granulated Blast Furnace slag (GGBS) and Sugar cane Bagasse ash. Here specimens are cast by adding Steel fiber at (0.5,1.0,1.5,2.0)% by volume of concrete and Polypropylene Fiber at (0.1,0.2,0.3,0.4)% by volume of concrete to the ternary blended concrete(TBC). It was found that the optimum dosage for Steel Fiber was 1.5% and that for Polypropylene was 0.3%.
KeywordsGGBS, Sugarcane Bagasse ash, Ternary Blended concrete, Fibre reinforced concrete(FRC).
I INTRODUCTION
Concrete is a versatile engineering material and its popularity as a basic building material is because of its good durability, ease with which it can be manufactured, the ability to mould it into any shape and size and its high compressive strength. But it has the demerits that plain concrete possess a very low tensile strength, limited ductility and little resistance to cracking. Internal micro cracks are inherently present in the concrete and its poor tensile strength is due to the propagation of the micro cracks, eventually leading to the brittle fracture of the concrete. Fiber reinforced concrete (FRC) is defined as the concrete made with hydraulic cement, containing fine or fine and coarse aggregate with discontinuous discrete fibers. FRC could play an important role to reduce the above mentioned problems.
Another important aspect is that since cement being inevitable in the production of concrete cement production is a significant source of global carbon dioxide (CO2) emissions, making up approximately 2.4 percent of global CO2 emissions from industrial and energy sources. The solution for this is to make binary or ternary blended concrete having Supplementary Cementitious Materials (SCM) which could have reduce the cement usage and also reduce the cost of concrete.
As a solution to the stated problems this study examines the effect of addition of fiber such as steel and polypropylene to a Ternary Blended Concrete (TBC), a concrete made with ordinary Portland cement with two other Supplementary Cementitious Materials. In this study the selected composition is 30% cement replacement by
Ground Granulated Blast Furnace Slag (GGBS) and 10% cement replacement by Sugar cane Bagasse ash (BA).
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OBJECTIVE
-
To form a control mix with optimum cement replacement of
-
GGBS by 30% by weight of cement and BAGASSEASH by 10% weight of cement.
-
To add fiber to this control mix with Polypropylene fiber 0.1,0.2,0.3,0.4% by volume of concrete and Steel Fiber 0.5,1,1.5,2.0 % by volume of concrete.
-
To find the optimum dosage of steel and polypropylene fiber.
-
To perform regression analysis.
II METHODOLGY
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Material Testing
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Casting of Specimens
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Testing for Compressive strength, Flexural strength, Impact resistance, Modulus of elasticity, Split tensile strength.
-
The properties of the tested material are shown below.
-
Cement:
Ordinary Portland cement, 53 Grade conforming to IS: 8112-1989. The specific gravity of cement was 3.14.
-
Fine aggregate
M.Sand conforming to Grading zone II of IS: 383 1970. Its specific gravity was 2.61
-
Coarse aggregate
Locally available crushed granite stones conforming to graded aggregate of nominal size 20 mm as per IS: 383 1970.
-
Ground Granulated Blast Slag (GGBS)
Ground granulated blast furnace slag obtained from Bangalore. Ground granulated blast-furnace slag is the granular material formed when molten iron blast furnace slag is rapidly chilled (quenched) by immersion in water. It is a granular product with very limited crystal formation, is highly Cementitious in nature and, ground to
cement fineness, and hydrates like Portland cement. Specific gravity 2.87
-
Bagasse ash (BA)
The sugar cane bagasse ash was obtained from Erode sugar factory. Specific gravity- 1.95
-
Super Plasticizer
A commercially available sulphonated naphthalene formaldehyde based super plasticizer (CERAPLAST 300) was used as chemical admixture to enhance the workability of the concrete.
-
Steel fiber (SF)
Corrugated steel fibers of aspect ratio 55 are used.
-
Polypropylene fiber
The commercially manufactured Recron-3S by Reliance Petro Chemicals is used.
Mix Design
TABLE-1: CONCRETE MIX DESIGN
Cement (kg/m3) |
GGBS (kg/m3) |
Bagasse ash (kg/m3) |
M. Sand (kg/m3) |
Coarse Aggregate (kg/m3) |
w/c ratio |
228 |
114 |
38 |
672.78 |
1192.2 |
0.43 |
Mix Designation
Mix Designati on |
Steel (% by volume of concrete) |
Mix Designation |
Poly propylene (% by volume of Concrete) |
C |
0 |
C |
0 |
S1 |
0.5 |
P1 |
0.1 |
S2 |
1 |
P2 |
0.3 |
S3 |
1.5 |
P3 |
0.5 |
S4 |
2.0 |
P4 |
0.4 |
Mix Designati on |
Steel (% by volume of concrete) |
Mix Designation |
Poly propylene (% by volume of Concrete) |
C |
0 |
C |
0 |
S1 |
0.5 |
P1 |
0.1 |
S2 |
1 |
P2 |
0.3 |
S3 |
1.5 |
P3 |
0.5 |
S4 |
2.0 |
P4 |
0.4 |
TABLE -2: MIX DESIGNATION
Fig 1: Compressive strength of Steel Fibre added concrete
Fig2: Compressive strength of Polypropylene Fibre added
concrete
Fig 3: Flexural Strength of Steel fibre added concrete
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RESULTS AND DISCUSSIONS
A. Tests on Hardened property
The various tests for hardened concrete has been performed and tabulated.
5.05
5
Flexural strngth
Flexural strngth
4.95
4.9
4.85
4.8
4.75
4.7
4.65
C P1 P2 P3 P4
28 day 4.77 4.82 4.89 5 4.92
Fig 4: Flexural Strength of Polypropylene fibre added concrete
Fig 5: Impact strength of Steel fibre added concrete
Fig 6: Impact strength of Polypropylene added concrete
Split tensile Strenght (N/mm2)
Split tensile Strenght (N/mm2)
Split strength
C
S1
S2
S3
S4
28 DAY
3.55
3.6
4.544
5
4.2
C
S1
S2
S3
S4
28 DAY
3.55
3.6
4.544
5
4.2
6
5
4
3
2
1
0
3.85
Split tensile strength
(N/mm2)
Split tensile strength
(N/mm2)
C
P1
P2
P3
P4
28 day
3.55
3.6
3.6
3.8
3.7
C
P1
P2
P3
P4
28 day
3.55
3.6
3.6
3.8
3.7
3.8
3.75
3.7
3.65
3.6
3.55
3.5
3.45
3.4
Modulus of elasticity (Gpa)
Modulus of elasticity (Gpa)
Fig 8: Split strngth of Polypropylene added concrete
60
50
40
30
20
10
0
C
S1 S2 S3 S4
60
50
40
30
20
10
0
C
S1 S2 S3 S4
28 day 34.541 45.336 47.776 51.701 44.321
28 day 34.541 45.336 47.776 51.701 44.321
Modulus of elasticity
(N/mm2)
Modulus of elasticity
(N/mm2)
Fig 9: Modulus of elasticity of steel added concret
50
40
30
20
10
0
C
P1 P2 P3 P4
50
40
30
20
10
0
C
P1 P2 P3 P4
28 day 34.54 41.52 42.63 46.68 44.39
28 day 34.54 41.52 42.63 46.68 44.39
Fig 10: Modulus of elasticity of Polypropylene added concrete
Fig 7: Split strength of Steel fibre added concrete
70
60
50
40
30 y = -15.107×3 + 39.529×2 – 8.6305x +
20
10
0
70
60
50
40
30 y = -15.107×3 + 39.529×2 – 8.6305x +
20
10
0
Compressive strenght
Compressive strenght
could be the reason why it further showed the reduction in strength latter on.
-
Fibre could play an important role in arresting the crack in the concrete.
39.798
R² = 0.9938
39.798
R² = 0.9938
-
Crack arrestment would definitely improve durability of concrete.
-
Regression curve can further clarify the optimum dosage
0 1 2 3
% Steel fiber
0 1 2 3
% Steel fiber
Fig 11: Regression curve fitting for Compressive strength with steel variation
-
-
CONCLUSION
-
From all the cases it was seen that the addition of fibre would result in increase of the Mechanical Properties of concrete.
-
The optimum dosage of Steel Fibre was found to be 1.5% by volume of concrete.
-
The optimum dosage of Polypropylene was found to be 0.3% by volume of concrete.
-
In the case of Polypropylene added concrete it was observed that beyond 0.3% , when it was added it resulted in the honey combing of the specimens. This
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-
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