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International Journal of Civil Engineering and Technology
INTERNATIONAL JOURNAL OF(IJCIET), ISSN 0976 – 6308 (Print), ISSN
CIVIL ENGINEERING
0976 – 6316(Online) Volume 5, Issue 2, February (2014), pp. 20-24 © IAEME
AND TECHNOLOGY (IJCIET)
ISSN 0976 – 6308 (Print)
ISSN 0976 – 6316(Online)
Volume 5, Issue 2, February (2014), pp. 20-24
© IAEME: www.iaeme.com/ijciet.asp
Journal Impact Factor (2014): 3.7120 (Calculated by GISI)
www.jifactor.com

IJCIET
©IAEME

STRENGTH PROPERTIES OF COIR FIBER CONCRETE
D.M. Parbhane1, S.B. Shinde2
1

2

Post Graduate Student, JNEC, Aurangabad, Maharashtra, India
Associate Prof. in Civil Engineering Dept, JNEC, Aurangabad, Maharashtra, India

ABSTRACT
The rising cost of construction material is a matter of concern. The reason for increase in cost is
high demand of concrete and scarcity of raw material.Hence the concrete technologists are researching
on alternative materials in the construction world. In this study, M 20 grade of concretewas produced by
adding coconut fiber (coir). Forty five cylinders were casted and their split tensile strength and
workability’s were evaluated at 7, 14 and 28 days. The workability and tensile strength of concrete
increased to some extent as the coir increased. Concrete produced by 1%, 2%, 3%, 4% & 5% addition
attained 28 days tensile strength of2.68,2.90,3.11,3.25,2.33 respectively. These results showed that Coir
FiberConcrete can be used in reinforced concrete construction. Its utilization is eco-friendly.
Keywords: Split Tensile Strength, Workability, Waste Utilization, Agricultural Waste, Coir.
INTRODUCTION
Concrete is world’s most widely used construction material. The utilization of concrete is
increasing at a higher rate due to development in infrastructure and construction activities all around the
world [1].However there are some negative impacts of more production of concrete like continuous
extensive extraction of aggregate from natural resources will lead to its depletion and ecological
imbalance [2]. Researchers are using agricultural and industrial waste to improve the strength properties
of concrete and to lead sustainable development [3]. This environmental reason has generated a lot of
concern in the construction world. The use of sugarcane bagasse, wooden chips, plastic waste, textile
waste, polyethylene, rice husk ash, rubber tyres, vegetable fibers, paper and pulp industry waste,
groundnut shell, waste glass, broken bricks are some examples of replacing aggregates in
concrete[4].The coconut fiber, termed as coir, when dried contains cellulose, lignin, pentosans and ash in
varying percentage [5].In Asia, the construction industry is yet to realize the advantages of light weight
concrete in high rise buildings [6]. Coconut fibers are not commonly used in construction industry and
are often dumped as agricultural waste.The aim of this research is to spread awareness of using coconut
20
International Journal of Civil Engineering and Technology (IJCIET), ISSN 0976 – 6308 (Print), ISSN
0976 – 6316(Online) Volume 5, Issue 2, February (2014), pp. 20-24 © IAEME

fiberas fifth ingredient in concrete and determining its tensile strength and workability.Until now,
Industrial by products and domestic wastes has been utilized in concrete, but the use of agricultural
waste in concrete is in its infancy stage. Coconut fiber is an agricultural waste.The materials are
proportioned by their weights. The water cement ratio is obtained by conducting various workability
tests. The obtained results are compared with that of conventional mix. Tests are as per the specified
procedure of Indian Standard Codes.
MATERIALS AND METHOD
The raw materials used in this experimentation were locally available and these included
Ordinary Portland Cement (O.P.C) as binding agent, river sand as fine aggregate, crushed granite and
coconut fiber as additional ingredient of concrete.Potable tap water was used for mixing and curing
throughout the entire investigation. The permissible and tolerance limits of water were checked as per
the I.S 456-2000[14].
Cement: Ordinary Portland cement grade 53, conforming to I.S 12269-1987[12] was used. Cement must
develop appropriate strength. It must represent the appropriate rheological behavior.
S.No
01
02
03
04
05

Physical Property
Standard Consistency
Fineness of Cement (%)
Specific Gravity
Initial Setting Time
Final Setting Time

Test Results
29.2%
7.4%
3.14
45 minutes.
260 minutes

Fine Aggregates: River sand was used as the fine aggregate, conforming to Zone-II as per I.S 3831970[13].The sand was air dried and sieved to remove any foreign material, prior to mixing.
S.No
01
02
03

Physical Property
Specific Gravity
Fineness Modulus
Bulk Density(kg/m3)

Test Results
2.6
2.83
1600

Coarse Aggregates: Coarse aggregate consists of 50% of self weight of concrete and 70% of volume of
concrete.
S.No
01
02
03
04

Physical Property
Specific Gravity
Fineness Modulus
Bulk Modulus(kg/m3)
Water Absorption

Test Results
2.7
2.73
1650
0.25

Coconut Fiber: Coconut fibers were collected from temples in the city to analyze the properties.
Thephysical properties of Coir are shown below.
S. No
01
02
03
04

Physical Property
Specific Gravity
Water Absorption (%)
Bulk Density(kg/m3)
Aspect Ratio
21

Test Results
0.87
10
1825
105
International Journal of Civil Engineering and Technology (IJCIET), ISSN 0976 – 6308 (Print), ISSN
0976 – 6316(Online) Volume 5, Issue 2, February (2014), pp. 20-24 © IAEME

PREPARATION OF SPECIMENS
Concrete Mix Design: M-20 grade of concrete was designed by I.S 10262-2009[11] method. The
natural coarse aggregates used were crushed granite. The test results were analyzed and compared with
theoretical values, obtained from various codes. Coir was added during mixing in varying percentages.
Batching and Mixing: Weigh Batching was practiced with the help of electronic weigh balance.
Batching was done as per the mix proportions. Mixing was done in tilting mixer. It was mixed for 2-3
minutes, after addition of water.
Placing and Compaction: Cylinders are cleaned and oiled to prevent the formation of bond between
concrete and moulds. Place the fresh concrete in cubes in 3 layers, tamping each layer 25 times. The
entrapped air in concrete is removed by table vibrator. Anything kept on the table gets vibrated.
Demoulding: After placing fresh concrete in moulds, it was allowed to set for 24 hours. It was marked
with some permanent identification mark i.e. A1, A2, A3, etc. Concrete cylinders are now kept in curing
tank for 7, 14 and 28 days. After 28 days, concrete cylinders were removed from curing tank to conduct
tests on hardened concrete.
RESULTS AND DISCUSSION
Split Tensile Strength:
Split Tensile strength is defined as resistance of concrete to radial loading. Cylinders were
placed in Universal Testing Machine (U.T.M), and load was applied. The readings on dial gauge
were recorded and tensile strength was calculated. The results of tensile strength are shown in
Table 01.
Calculations: Tensile Strength = 2P/ (πdl)
Table 01. Tensile Strength of Coconut Fiber Concrete (N/mm2)
Curing Days

0%

1%

2%

3%

4%

5%

07

1.76

1.81

1.93

2.10

2.23

1.58

14

2.31

2.45

2.63

2.83

2.95

2.17

28

2.54

2.68

2.90

3.11

3.25

2.33

Workability: The results of workability determination are shown in table 02.It is observed that as
percentage of coir increased, the workability in terms of slump (mm) and compaction factor increased.
Workability

0%

1%

2%

3%

4%

5%

Slump (mm)

85

61

67

73

79

84

Compaction
Factor Value

0.910

0.914

0.917

0.920

0.924

0.930

22
International Journal of Civil Engineering and Technology (IJCIET), ISSN 0976 – 6308 (Print), ISSN
0976 – 6316(Online) Volume 5, Issue 2, February (2014), pp. 20-24 © IAEME

Bar Charts: The bar charts are drawn for Tensile strength results. These are drawn between tensile
strength and percentage addition of coconut fiber at 7, 14 and 28 days to observe the variation of results.

28 Days Strength
5
4
3
2
1
0
0

1

2

3

4

5

4

5

4

5

% Coir Addition

14 Days Strength
5
4
3
2
1
0
0

1

2

3
% Coir Addition

7 Days Strength
5
4
3
2
1
0
0

1

2

3
% Coir Addition

23
International Journal of Civil Engineering and Technology (IJCIET), ISSN 0976 – 6308 (Print), ISSN
0976 – 6316(Online) Volume 5, Issue 2, February (2014), pp. 20-24 © IAEME

CONCLUSIONS AND RECOMMENDATIONS
It is concluded that
• Increase in percentage addition by coir increased tensile strength. But,if coir added is
5%,then strength decreases.
• Coconut Fiber increased the slump value and compaction factor value of Concrete.
The following recommendations are made at the end of the study.
• Effect of different admixtures can be studied on Coir Fiber Concrete
• Evaluating Bond Strength of Coir Fiber Concrete
• Coconut Coir- Cement compatibility
REFERENCES
1.
2.
3.

4.
5.

6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.

18.

19.

J.M.Crow, The Concrete Conundrum,2006, available at www.chemistryworld.com
A. short and W.Kinniburgh, Lightweight Concrete, Applied Science Publishers, London
M.Ali,B,Nolot and N. Chouw,April 2009, “ Behaviour of coconut fibre and rope reinforced
concrete members with debounding length .Annual Australian Earthquake Engineering Society
Conference, “New Castle Earthquake Dec.11-13.Paper 04
Majid Ali. ,11 July 2011, “ Coconut Fibre – A Versatile Material and its application in
Engineering - .Journal of Civil Eng.& Const. Tech. Vol.2(9),pp.189-197,2 Sept.2011
Noor Md,SadiqulHasan, Habiburrahman, Mdshiblee and MdSaiful Islam, 2012, “ The use of
Coconut Fibre in the production of Structural Lightweight Concrete”- Journal of Applied
Sciences 12(9):839,2012.
Shetty M.S,” Concrete Technology Theory and Practice”(1991),3rd edition, S.Chand Company
Limited, New Delhi.
British Standard Institutions, BS 8110 – Part1, The structural use of concrete, BSI, London 1997.
ManinderKaur and Manpreet Kaur, 2012, “A review of utilization of Coconut coir as coarse
aggregate in concrete”, International Journal of Applied Engineering Research,7,pp 05-09
Yaw Osei,2013, “Experimental Assessment on coconut coir as aggregate in concrete",
International Journal of Engineering Science Research,05,pp 07-11
K.U.Rogo,2010, “Exploratory study of coconut coir as coarse aggregate in concrete", Journal of
engineering and applied sciences,02,pp 19-24.
I.S 10262-2009:”Recommended guidelines for concrete mix design”, 2009
I.S 12269-1987:”Specifications for 53 grade Ordinary Portland Cement”, 1987
I.S 383-1970:”Specifications for coarse and fine aggregates”, 1970
I.S 456-2000 “Indian Standard: Plain and Reinforced Cement Concrete” Code of practice.
Improvement in the Strength of Concrete by using Industrial and Agriculture waste.-Pravin V
Domke1 , IOSR Journal of Engineering, April.2012, Vol.2(4) pp”755-759.
Structural models for the prediction of compressive strength of coconut fiber reinforced. Sule,
Samuel.- International Journal of Engineering and Advanced Technology Vol.2. April. 2013.
Ghassan Subhi Jameel, “Study The Effect of Addition of Wast Plastic on Compressive and
Tensile Strengths of Structural Lightweight Concrete Containing Broken Bricks as a coarse
Aggregate”, International Journal of Civil Engineering & Technology (IJCIET), Volume 4, Issue
2, 2013, pp. 415 - 432, ISSN Print: 0976 – 6308, ISSN Online: 0976 – 6316.
Dewanshu Ahlawat and L.G.Kalurkar, “Coconut Shell as Partial Replacement of Coarse
Aggregate”, International Journal of Civil Engineering & Technology (IJCIET), Volume 4, Issue
6, 2013, pp. 12 - 16, ISSN Print: 0976 – 6308, ISSN Online: 0976 – 6316.
Riyaz Khan and Prof.S.B.Shinde, “Effect of Unprocessed Steel Slag on the Strength of Concrete
When used as Fine Aggregate”, International Journal of Civil Engineering & Technology
(IJCIET), Volume 4, Issue 2, 2013, pp. 231 - 239, ISSN Print: 0976 – 6308, ISSN Online:
0976 – 6316.
24

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  • 1. International Journal of Civil Engineering and Technology INTERNATIONAL JOURNAL OF(IJCIET), ISSN 0976 – 6308 (Print), ISSN CIVIL ENGINEERING 0976 – 6316(Online) Volume 5, Issue 2, February (2014), pp. 20-24 © IAEME AND TECHNOLOGY (IJCIET) ISSN 0976 – 6308 (Print) ISSN 0976 – 6316(Online) Volume 5, Issue 2, February (2014), pp. 20-24 © IAEME: www.iaeme.com/ijciet.asp Journal Impact Factor (2014): 3.7120 (Calculated by GISI) www.jifactor.com IJCIET ©IAEME STRENGTH PROPERTIES OF COIR FIBER CONCRETE D.M. Parbhane1, S.B. Shinde2 1 2 Post Graduate Student, JNEC, Aurangabad, Maharashtra, India Associate Prof. in Civil Engineering Dept, JNEC, Aurangabad, Maharashtra, India ABSTRACT The rising cost of construction material is a matter of concern. The reason for increase in cost is high demand of concrete and scarcity of raw material.Hence the concrete technologists are researching on alternative materials in the construction world. In this study, M 20 grade of concretewas produced by adding coconut fiber (coir). Forty five cylinders were casted and their split tensile strength and workability’s were evaluated at 7, 14 and 28 days. The workability and tensile strength of concrete increased to some extent as the coir increased. Concrete produced by 1%, 2%, 3%, 4% & 5% addition attained 28 days tensile strength of2.68,2.90,3.11,3.25,2.33 respectively. These results showed that Coir FiberConcrete can be used in reinforced concrete construction. Its utilization is eco-friendly. Keywords: Split Tensile Strength, Workability, Waste Utilization, Agricultural Waste, Coir. INTRODUCTION Concrete is world’s most widely used construction material. The utilization of concrete is increasing at a higher rate due to development in infrastructure and construction activities all around the world [1].However there are some negative impacts of more production of concrete like continuous extensive extraction of aggregate from natural resources will lead to its depletion and ecological imbalance [2]. Researchers are using agricultural and industrial waste to improve the strength properties of concrete and to lead sustainable development [3]. This environmental reason has generated a lot of concern in the construction world. The use of sugarcane bagasse, wooden chips, plastic waste, textile waste, polyethylene, rice husk ash, rubber tyres, vegetable fibers, paper and pulp industry waste, groundnut shell, waste glass, broken bricks are some examples of replacing aggregates in concrete[4].The coconut fiber, termed as coir, when dried contains cellulose, lignin, pentosans and ash in varying percentage [5].In Asia, the construction industry is yet to realize the advantages of light weight concrete in high rise buildings [6]. Coconut fibers are not commonly used in construction industry and are often dumped as agricultural waste.The aim of this research is to spread awareness of using coconut 20
  • 2. International Journal of Civil Engineering and Technology (IJCIET), ISSN 0976 – 6308 (Print), ISSN 0976 – 6316(Online) Volume 5, Issue 2, February (2014), pp. 20-24 © IAEME fiberas fifth ingredient in concrete and determining its tensile strength and workability.Until now, Industrial by products and domestic wastes has been utilized in concrete, but the use of agricultural waste in concrete is in its infancy stage. Coconut fiber is an agricultural waste.The materials are proportioned by their weights. The water cement ratio is obtained by conducting various workability tests. The obtained results are compared with that of conventional mix. Tests are as per the specified procedure of Indian Standard Codes. MATERIALS AND METHOD The raw materials used in this experimentation were locally available and these included Ordinary Portland Cement (O.P.C) as binding agent, river sand as fine aggregate, crushed granite and coconut fiber as additional ingredient of concrete.Potable tap water was used for mixing and curing throughout the entire investigation. The permissible and tolerance limits of water were checked as per the I.S 456-2000[14]. Cement: Ordinary Portland cement grade 53, conforming to I.S 12269-1987[12] was used. Cement must develop appropriate strength. It must represent the appropriate rheological behavior. S.No 01 02 03 04 05 Physical Property Standard Consistency Fineness of Cement (%) Specific Gravity Initial Setting Time Final Setting Time Test Results 29.2% 7.4% 3.14 45 minutes. 260 minutes Fine Aggregates: River sand was used as the fine aggregate, conforming to Zone-II as per I.S 3831970[13].The sand was air dried and sieved to remove any foreign material, prior to mixing. S.No 01 02 03 Physical Property Specific Gravity Fineness Modulus Bulk Density(kg/m3) Test Results 2.6 2.83 1600 Coarse Aggregates: Coarse aggregate consists of 50% of self weight of concrete and 70% of volume of concrete. S.No 01 02 03 04 Physical Property Specific Gravity Fineness Modulus Bulk Modulus(kg/m3) Water Absorption Test Results 2.7 2.73 1650 0.25 Coconut Fiber: Coconut fibers were collected from temples in the city to analyze the properties. Thephysical properties of Coir are shown below. S. No 01 02 03 04 Physical Property Specific Gravity Water Absorption (%) Bulk Density(kg/m3) Aspect Ratio 21 Test Results 0.87 10 1825 105
  • 3. International Journal of Civil Engineering and Technology (IJCIET), ISSN 0976 – 6308 (Print), ISSN 0976 – 6316(Online) Volume 5, Issue 2, February (2014), pp. 20-24 © IAEME PREPARATION OF SPECIMENS Concrete Mix Design: M-20 grade of concrete was designed by I.S 10262-2009[11] method. The natural coarse aggregates used were crushed granite. The test results were analyzed and compared with theoretical values, obtained from various codes. Coir was added during mixing in varying percentages. Batching and Mixing: Weigh Batching was practiced with the help of electronic weigh balance. Batching was done as per the mix proportions. Mixing was done in tilting mixer. It was mixed for 2-3 minutes, after addition of water. Placing and Compaction: Cylinders are cleaned and oiled to prevent the formation of bond between concrete and moulds. Place the fresh concrete in cubes in 3 layers, tamping each layer 25 times. The entrapped air in concrete is removed by table vibrator. Anything kept on the table gets vibrated. Demoulding: After placing fresh concrete in moulds, it was allowed to set for 24 hours. It was marked with some permanent identification mark i.e. A1, A2, A3, etc. Concrete cylinders are now kept in curing tank for 7, 14 and 28 days. After 28 days, concrete cylinders were removed from curing tank to conduct tests on hardened concrete. RESULTS AND DISCUSSION Split Tensile Strength: Split Tensile strength is defined as resistance of concrete to radial loading. Cylinders were placed in Universal Testing Machine (U.T.M), and load was applied. The readings on dial gauge were recorded and tensile strength was calculated. The results of tensile strength are shown in Table 01. Calculations: Tensile Strength = 2P/ (πdl) Table 01. Tensile Strength of Coconut Fiber Concrete (N/mm2) Curing Days 0% 1% 2% 3% 4% 5% 07 1.76 1.81 1.93 2.10 2.23 1.58 14 2.31 2.45 2.63 2.83 2.95 2.17 28 2.54 2.68 2.90 3.11 3.25 2.33 Workability: The results of workability determination are shown in table 02.It is observed that as percentage of coir increased, the workability in terms of slump (mm) and compaction factor increased. Workability 0% 1% 2% 3% 4% 5% Slump (mm) 85 61 67 73 79 84 Compaction Factor Value 0.910 0.914 0.917 0.920 0.924 0.930 22
  • 4. International Journal of Civil Engineering and Technology (IJCIET), ISSN 0976 – 6308 (Print), ISSN 0976 – 6316(Online) Volume 5, Issue 2, February (2014), pp. 20-24 © IAEME Bar Charts: The bar charts are drawn for Tensile strength results. These are drawn between tensile strength and percentage addition of coconut fiber at 7, 14 and 28 days to observe the variation of results. 28 Days Strength 5 4 3 2 1 0 0 1 2 3 4 5 4 5 4 5 % Coir Addition 14 Days Strength 5 4 3 2 1 0 0 1 2 3 % Coir Addition 7 Days Strength 5 4 3 2 1 0 0 1 2 3 % Coir Addition 23
  • 5. International Journal of Civil Engineering and Technology (IJCIET), ISSN 0976 – 6308 (Print), ISSN 0976 – 6316(Online) Volume 5, Issue 2, February (2014), pp. 20-24 © IAEME CONCLUSIONS AND RECOMMENDATIONS It is concluded that • Increase in percentage addition by coir increased tensile strength. But,if coir added is 5%,then strength decreases. • Coconut Fiber increased the slump value and compaction factor value of Concrete. The following recommendations are made at the end of the study. • Effect of different admixtures can be studied on Coir Fiber Concrete • Evaluating Bond Strength of Coir Fiber Concrete • Coconut Coir- Cement compatibility REFERENCES 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. J.M.Crow, The Concrete Conundrum,2006, available at www.chemistryworld.com A. short and W.Kinniburgh, Lightweight Concrete, Applied Science Publishers, London M.Ali,B,Nolot and N. Chouw,April 2009, “ Behaviour of coconut fibre and rope reinforced concrete members with debounding length .Annual Australian Earthquake Engineering Society Conference, “New Castle Earthquake Dec.11-13.Paper 04 Majid Ali. ,11 July 2011, “ Coconut Fibre – A Versatile Material and its application in Engineering - .Journal of Civil Eng.& Const. Tech. Vol.2(9),pp.189-197,2 Sept.2011 Noor Md,SadiqulHasan, Habiburrahman, Mdshiblee and MdSaiful Islam, 2012, “ The use of Coconut Fibre in the production of Structural Lightweight Concrete”- Journal of Applied Sciences 12(9):839,2012. Shetty M.S,” Concrete Technology Theory and Practice”(1991),3rd edition, S.Chand Company Limited, New Delhi. British Standard Institutions, BS 8110 – Part1, The structural use of concrete, BSI, London 1997. ManinderKaur and Manpreet Kaur, 2012, “A review of utilization of Coconut coir as coarse aggregate in concrete”, International Journal of Applied Engineering Research,7,pp 05-09 Yaw Osei,2013, “Experimental Assessment on coconut coir as aggregate in concrete", International Journal of Engineering Science Research,05,pp 07-11 K.U.Rogo,2010, “Exploratory study of coconut coir as coarse aggregate in concrete", Journal of engineering and applied sciences,02,pp 19-24. I.S 10262-2009:”Recommended guidelines for concrete mix design”, 2009 I.S 12269-1987:”Specifications for 53 grade Ordinary Portland Cement”, 1987 I.S 383-1970:”Specifications for coarse and fine aggregates”, 1970 I.S 456-2000 “Indian Standard: Plain and Reinforced Cement Concrete” Code of practice. Improvement in the Strength of Concrete by using Industrial and Agriculture waste.-Pravin V Domke1 , IOSR Journal of Engineering, April.2012, Vol.2(4) pp”755-759. Structural models for the prediction of compressive strength of coconut fiber reinforced. Sule, Samuel.- International Journal of Engineering and Advanced Technology Vol.2. April. 2013. Ghassan Subhi Jameel, “Study The Effect of Addition of Wast Plastic on Compressive and Tensile Strengths of Structural Lightweight Concrete Containing Broken Bricks as a coarse Aggregate”, International Journal of Civil Engineering & Technology (IJCIET), Volume 4, Issue 2, 2013, pp. 415 - 432, ISSN Print: 0976 – 6308, ISSN Online: 0976 – 6316. Dewanshu Ahlawat and L.G.Kalurkar, “Coconut Shell as Partial Replacement of Coarse Aggregate”, International Journal of Civil Engineering & Technology (IJCIET), Volume 4, Issue 6, 2013, pp. 12 - 16, ISSN Print: 0976 – 6308, ISSN Online: 0976 – 6316. Riyaz Khan and Prof.S.B.Shinde, “Effect of Unprocessed Steel Slag on the Strength of Concrete When used as Fine Aggregate”, International Journal of Civil Engineering & Technology (IJCIET), Volume 4, Issue 2, 2013, pp. 231 - 239, ISSN Print: 0976 – 6308, ISSN Online: 0976 – 6316. 24