IRJET-Performance evaluation of Steel Fibre Reinforced Concrete Beams with Bagasse Ash

International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
Volume: 05 Issue: 01 | Jan-2018 www.irjet.net p-ISSN: 2395-0072
© 2018, IRJET | Impact Factor value: 6.171 | ISO 9001:2008 Certified Journal | Page 616
Performance evaluation of Steel Fibre Reinforced Concrete Beams with
Bagasse Ash
Angu Senthil.K 1, Jagadeesan.R 2, Easwaran.P 3
1,2,3Assistant professor, Department of Civil Engineering, K.S.Rangasamy College of Technology, Tamilnadu
---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - Plain concrete has low tensile strength and
hence steel is provided. Addition of steel fibres in RC beam
will increase the performance of beam. In this study,
performance evaluation of Steel fibre reinforced concrete
(SFRC) beams is done using bagasse ash(BA). Bagasse ash
generated from sugar industry (co.generation plant) is used
for partially replacing cement. M20 mix design is performed
and optimal values of bagasse ash and steel fibres were
determined. Beams are cast for optimum value (i.e) 10%
bagasse ash which partially replace cement and 1% volume
fraction of hooked end steel fibres. Beams are tested under
two point loading in a loading frame of 1000 kN capacity.
Load deflection behaviour of conventional and SFRC+BA
beams are studied. Initial crack of SFRC+BA beams was
delayed due to its ductile behaviour. 35% increase in
ultimate load was observed in SFRC+BA beams. SFRC+BA
beams show improved performance interms of flexure when
compared to conventional beams.
Key Words: Bagasse Ash, Steel Fibre, Ultimate load,
Deflection, Crack
1.INTRODUCTION
Bagasse ash is generated from sugar industry. The
discarded fibrous matter obtained after the process of
juice extraction in sugar industry is called bagasse. This
bagasse is used in co.generation plant to generate power
and the residue left after the process is called baggase
ash[1]. Bagasse ash blended concrete performs well in
terms of strength and durability. High early strength and
reduction in water permeability can be achieved using
bagasse ash[4]. Bagasse ash can be used for producing
high strength concrete[3].
Steel fibre act as crack arrestor in concrete matrix[5].
Various types of steel fibres like crimped & hooked end
steel fibres in micro and macro form with varying aspect
ratio have significant impact on the performance of RC
beam. Steel fibres improve the various characteristics of
beam such as stiffness, energy absorption and ductility.
The combined effect of long and short steel fibres in
concrete may influence the behaviour of beam.[8].
1.1 LITERATURE REVIEW
Sumrerng et.al studied the behaviour of high strength
concrete using bagasse ash as partial replacement for
cement. Author produced high strength concrete of
strength more than 65 Mpa. Bagasse ash was used in
various proportions(10%, 20 % and 30%). Author
performed test on compressive strength , porosity,
co.efficient of water absorption , Rapid chloride
penetration test and chloride diffusion coefficient and
concluded that 30 % replacement of Bagasse ash is
optimum for producing high strength concrete.
Wu Yao et.al investigated the behaviour of concrete with
combination of different types of fibre. Polypropylene and
carbon, Carbon and steel , Steel and Polypropylene are the
different combinations used.100 mm x 100 mm cubes and
100 mm x 100 mm x 500 mm beams were cast and tested
for various properties like Compression, split and flexure.
Toughness evaluation have been done for these hybrid
fibres. By performing all these test, author concluded that
carbon-steel combination gave concrete of the highest
strength.
Mukesh shukla experimented the flexure behaviour of
steel fibre reinforced concrete beams with two different
volume fractions of one percent and two percent. Mix for
20 Mpa strength was designed. Beams of size 120 mm x
240 mm x 1900 mm were used for the study. Author gave a
modified procedure for calculating ultimate strength of
beam with steel fibres. Steel fibre reinforced beams show
better characteristics in terms of ultimate load and stiffness
when compared to conventional beams.
2.MATERIALS USED
OPC 53 Grade cement used for this study and its specific
gravity was found to be 3.15. Bagasse ash were collected
from Amaravathi sugar mills, Udumalpet. Fine aggregates
conforming to Zone I grading and angular coarse
aggregates of 20 mm were used in preparing concrete mix.
Hooked end steel fibres of tensile strength 1100 N/mm2
and aspect ratio 55.55 were used. Superplasticizer was
used inorder to improve the workability of concrete .
3.MIX PROPORTION
Mix design for M20 were carried out and arrived which is
given in Table 1.
Table 1 Mix Proportion
Cement
(Kg/m3)
Fine
aggregate
(Kg/m3)
Coarse
aggregate
(Kg/m3)
W/C
(Kg/m3)
383 717 1232 153

4.EXPERIMENTAL PROGRAM
4.1 CASTING OF BEAM
Beams were cast for optimum value (i.e) 10% bagasse ash
which partially replace cement and 1% volume fraction of
hooked end steel fibres[12]. Beams of span 1500 mm and
cross section 150 x 200 mm were cast and tested under
two point loading. The beam consists of two 10 mm
diameter bars at top and two 10 mm diameter bars at
bottom. Shear reinforcement were provided with 8 mm
diameter bars @ 100 mm spacing. Raw materials for
concrete were mixed inside the concrete mixer. Concrete
were poured into the steel mould for casting the beam.
Two numbers of conventional beam and two numbers of
SFRC + BA beams were cast and cured for 28 days.
4.2 TESTING OF BEAM
All the beam specimens were tested under a loading frame
of 1000 kN capacity. Beams were simply supported over a
span of 1200 mm. Two-point static load was applied on all
beams and at load increment of 4 kN, deflection were
noted. Two point loading system is used at a distance L/3
in order to get pure bending. All the beams were loaded
upto their ultimate load. Slope of tangent in load deflection
curve gives the value of stiffness. Ductility factor is
obtained by calculating the ratio of ultimate deflection to
yield deflection. Area under load-deflection curve is
calculated and it gives the value of energy absorption.
5. RESULTS AND DISCUSSION
Test results of Beam were given in Table 2.
Table 2 Beam test results-Load and deflection
Load and deflection plot for conventional and SFRC+BA
beams were given in Figure 1, Figure 2 and Figure 3
respectively.
Figure 1 Load - Deflection plot for conventional beam
Figure 2 Load - Deflection plot for SFRC+BA beam
Figure 3 Comparison of Load - Deflection plot for beams
Comparison chart for first crack and ultimate load was
given in figure 4.
Figure 4 Comparison of First crack load and Ultimate load
Various characteristics of beam such as Stiffness, Ductility
and Energy absorption were given in Table 3.
Table 3 Beam test results - Stiffness, Ductility and
Energy absorption
0
10
20
30
40
50
60
0.00 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00
LoadkN
Deflection mm
Conventional beam
0
10
20
30
40
50
60
70
80
0.00 2.00 4.00 6.00 8.00 10.00 12.00
LoadkN
Deflection mm
SFRC + BAbeams
0
10
20
30
40
50
60
70
80
0.00 2.00 4.00 6.00 8.00 10.00 12.00
LoadkN
Deflection mm
Conventional Vs SFRC+BA Beams
SFRC+BA
CONVENTIONAL
16
52
24
70
0
10
20
30
40
50
60
70
80
First crack load Ultimate load
Load(kN)
Conventional Beams SFRC + BA Beams
S.N
o
Name of the
specimen
First crack
load (kN)
Ultimate
load (kN)
Ultimate
deflection (mm)
1
Conventional
Beam
16 52 7.32
2
SFRC + BA
Beam
24 70 9.7
S.No
Name of the
specimen
Stiffness
kN/mm
Ductility
factor
Energy absorption
kNmm
1
Conventional
Beam
25 3.52 250
2
SFRC + BA
Beam
60 7 440

 For conventional beams, initiation of crack take place
at a load of 16 kN whereas for SFRC+BA beams, it is
24 kN. This shows the ductile behaviour of SFRC+BA
beams
 In conventional specimen, ultimate failure took place
at a load of 52 kN and for SFRC+BA it is 70 kN.
35% increase in ultimate load was observed.
 Crack patterns were occurred in flexure zone.
 Stiffness of SFRC+BA beam is 2.4 times more than that
of conventional beam.
 Ductility factor of SFRC+BA beam is 2 times more than
that of conventional beam.
 Energy absorption capacity of SFRC+BA beam is 1.7
times more than that of conventional beam.
6. CONCLUSION
SFRC combined bagasse ash improved the performance of
beam interms of flexure when compared to conventional
beam. Utilisation of bagasse ash in concrete will avoid the
disposal problem of ash which minimise the cement
production and thereby reducing the emission of carbon-
dioxide. Fibres improved the ductility characteristics of
beam and act as crack arrestors.
7. REFERENCES
1) A. Bahurudeen , Manu Santhanam (2014), "Performance
Evaluation of Sugarcane Bagasse Ash-Based Cement for
Durable Concrete", 4th International Conference on the
Durability of Concrete Structures, Purdue University, West
Lafayette, IN, USA.
2)Fatih Altun, Tefaruk Haktanir, Kamura Ari (2007) ”Effect
of steel fibre addition on mechanical properties of concrete
and RC beams”, Construction and Building materials, Vol.21,
pp.654-661.
3)Sumrerng Rukzon, Prinya Chindaprasirt(2012),
"Utilisation of bagasse ash in high strength concrete",
Materials and design, Vol.34, pp.45-50.
4)K.Ganesan, K.Rajagopal, K.Thangavel (2007).,”Evaluation
of Bagasse Ash as Supplementary Cementitious Material”,
Cement and Concrete Composites, Vol 29 ,pp.515-524
5)Shende.A.M., Pande.A.M. (2011).,“ Comparative study on
Steel fibre reinforced Cum control concrete under flexural
and deflection”, International Journal of Applied
Engineering Research, Vol 1, pp. 942-950.
6)Wu Yao, Jie Li, Keru Wu. (2003)., “ Mechanical properties
of hybrid fiber-reinforced concrete at low fiber volume
fraction”, Cement and Concrete Research, Vol 33, pp. 27-30.
7)Mukesh Shukla(2011), “Behavior of Reinforced Concrete
Beams with Steel Fibres under Flexural Loading”.
International Journal of Earth Sciences and Engineering ,,
Vol. 04, No.06, pp 843-846
8)Kalaivani.M & Vennila.G (2017), '‘Experimental
investigation on structural behavior of micro and macro
fibre reinforced concrete beams subjected to cyclic
loading'’, Journal of Structural Engineering, vol. 44, no. 1, pp.
70-75.
9)Yang.H.I., Joh C. And Kim S.B. (2011)”Flexural Strength of
ultra high strength concrete beams reinforced with steel
fibres”, Procedia Engineering, Vol.14, pp.793-796.
10)IS 10262-2009,Indian standard-Concrete Mix
proportioning –Guidelines, 1st revision.
11)IS 516-1959, Methods of test for strength of concrete,
18th reprint, Jun-2006.
12)Angu Senthil. K, Sasikumar.M, Jagadeesan.R, Easwaran. P
(2017), "Experimental Study on Mechanical Properties of
Hooked End Steel Fibre Reinforced Concrete Specimens
using Bagasse Ash ", International Journal for Research in
Applied Science and Engineering Technology , Vol. 5, pp.
1303-1306.
13)Holschemacher K., Mueller T., Ribakov Y. (2010), ”Effect
of fibres on mechanical properties of high strength
concrete”, Material and Design,Vol.31,pp.2604-2615.

IRJET-Performance evaluation of Steel Fibre Reinforced Concrete Beams with Bagasse Ash

More Related Content

IRJET-Performance evaluation of Steel Fibre Reinforced Concrete Beams with Bagasse Ash