Skip to main content

Full text of "Study on Flexural Strengthening of RC Beam using Ferrocement Laminates Recron"

See other formats


International Journal of Trend in Scientific Research and Development (IJTSRD) 

Volume 4 Issue 3, April 2020 Available Online: www.ijtsrd.com e-ISSN: 2456 - 6470 

♦ ♦ 

Study on Flexural Strengthening of RC 
Beam using Ferrocement Laminates Recron 

R. Manimozhi 1 , S. Janagan 2 

ip.G Student Civil Structural Engineering, Assistant Professor, 

^Gnanamani College of Engineering, Namakkal, Tamil Nadu, India 


ABSTRACT 


Worldwide a outstanding deal of lookup is presently being centered on the 
use of high-quality fabric for restore and strengthening of present 
strengthened concrete shape and the lookup is additionally difficulty about 
the nice utilization of fibre in development industries. Ferro cement is one 
of the versatile substances for strengthening of constructions and is 
recognized as a novel development material. For instance, the use of Ferro 
cement in the building of earthquake resistant structures, precast roof 
factors and different marine makes use of will end result in the plan of 
smaller sections. This in flip reduces the lifeless weight and leads to the 
diagram of value fantastic structures. Ferro cement has been used extra 
extensively in latest years for strengthening of current structural factors 
like beam, column, slab, beam column joint etc. It has been understood 
from the literature overview that the load carrying ability of current 
buildings can be increased through strengthening it with Ferro cement 
laminates. Also it has been determined from the literature that, residences 
of Ferro cement laminates can be increased by means of altering the 
percentage and kind of constituent materials. However research to check 
out the impact of fibre in mortar and extraordinary extent fraction of mesh 
reinforcement and utilisation of such cloth for strengthening of structural 
factors have now not be carried out so far. Hence there exists a technical 
understanding hole in its area. A lookup application to find out about the 
impact of fibre in Ferro cement laminate as strengthening fabric for RC 
beams and their behaviour in phrases of strength, ductility, strength 
absorption ability would be of a great deal relevance and usefulness. 
Hence, an try is to be made to behavior an experimental and analytical 
investigation to learn about the flexural behaviour of RC beams reinforced 
the use of Ferro cement laminates with fibre. 



How to cite this paper: R. Manimozhi | S. 
Janagan "Study on Flexural Strengthening 
of RC Beam using Ferrocement Laminates 
Recron" Published in 
International Journal 
of Trend in Scientific 
Research and 

Development 
(ijtsrd), ISSN: 2456- 
6470, Volume-4 | 

Issue-3, April 2020, 
pp.732-736, URL: 

www.ijtsrd.com/papers/ijtsrd30685.pdf 

Copyright © 2020 by author(s) and 
International Journal of Trend in Scientific 
Research and Development Journal. This 
is an Open Access article distributed 
under the terms of ry—w 7K 1 

the Creative 

Commons Attribution ““ 

License (CC BY 4.0] 

(http://creativecommons.org/licenses/by 
/ 4.0) 


1. INTRODUCTION 

Natural failures such as earthquakes, tornadoes and tsunami 
threaten the integrity of civil infrastructures and protection 
of their uses. A giant wide variety of present bolstered 
concrete structures and different constructions commonly 
have no longer enough capability to withstand the forces 
throughout such catastrophes. In order to assurance the 
security of the people, the older constructions want to be 
repaired and reinforced to stop their collapse. Efficient 
techniques are wished to be developed for constructions 
restore and strengthening. The growing old of the nation's 
infrastructure in a tight financial surroundings has 
necessitated the search for modern and value high-quality 
solutions. In latest years, the use of ferrocement laminate has 
emerge as a situation of tremendous pastime in structural 
community. Several research had been targeted on the use of 
externally bonded ferrocement laminates to beef up present 
constructions in want of strengthening. 

A. Adding reinforcement steel bars to the main steel 
without increasing the beam's cross sectional area 

B. Section enlargement 

C. Sprayed concrete 

D. Steel plate bonding 

E. Ferrocement laminates 

F. Span shortening 


G. Strengthening using Fibre Reinforced Polymer 

2. METHODOLOGY 

The learn about on literature gives a clear thought on 
substances to be accumulated and system to be undertaken. 
The methodology of this lookup work used to be fashioned 
and is proven in the shape of drift chart and is given in 
discern 3.1. After the literature assessment the substances 
have been amassed and the fabric residences such as 
particular gravity and fineness were studied. Based on the 
fabric residences combine graph of concrete was once 
carried out by means of IS technique the usage of the code IS 
10262:2009. 

Then the strengthened concrete beams had been casted as 
per the designed dimension and combine share of concrete. 
The ferrocement laminate have been casted with chosen 
wire mesh and cement mortar along with fibre. The beams 
and laminates have been cured for 28 days. After curing, all 
the specimens have been allowed to floor dry for 24 hours at 
room temperature. Then, the beams had been bolstered with 
ferrocement laminates the usage of epoxy resin and allowed 
for dry currying in the air for 7 days. 


@ IJTSRD | Unique Paper ID - IJTSRD30685 | Volume - 4 | Issue - 3 | March-April 2020 


Page 732 











International Journal of Trend in Scientific Research and Development (IJTSRD) @ www.ijtsrd.com elSSN: 2456-6470 


After 7 days of air curing, the manipulate beam and 
bolstered beams had been difficulty to flexural check 
underneath two-point loading. The initializations of flexural 
crack have been cautiously located and corresponding load 
and deflection had been noted. The final load and the mode 
of failure of the specimen are noted. Then analytical learn 
about was once made and the interpretations of the 
experimental and analytical effects have been made. 


3. MATERIAL PROPERTIES 

3.1. PRELIMINARY TEST FOR MATERIALS 

3.1.1. FINENESS TEST 


Cement 

sample 

Weight of 
cement 

taken for 

test 

Weight of 
cement 

retained 
on IS sieve 

Fineness 

c%) 

((W2/W1) 

X100) 

1 

100 

4g 

4% 


Table 3.1 Fineness Test 


3.2. PREPARATION OF THE MOULD 

The moulds used for casting the cube, cylinder. The size of 
cube and cylinder is 150mm X 150mm X 150mm, 150mm X 
300mm. All the faces of the mould were assembled by using 
nuts and bolts and are clamped to the base plate. The mould 
faces must be thinly coated with mould oil to prevent 
leakage during filling. 



Fig 3.3 Compaction of concrete 


4. EXPERIMENTAL INVESTIGATION 
4.1. COMPRESSIVE STRENGTH TEST 


S.NO. 

Cube compressive 
strength (N/mm 2 ) 

Cylinder split tensile 
strength (N/mm 2 ) 

1 

37.7 

2.54 

2 

38.22 

2.47 

3 

37.55 

2.75 


Table 4.1 Concrete Compressive Strength And Split 
Tensile Strength 



Fig.4.1 Compressive Strength Test 


^ compressive strength 

*1 38.4 

4 . 

&m38.2 

S 5 

S % 38 

<b “ 

a 37.8 
U 37.6 
37.4 
37.2 


Fig.4.2 compressive Strength of cube at 7days, 14 days 
& 21 days 

4.2. SPLIT TENSILE STRENGTH TEST 


Cylinder split tensile strength 


2.75 



split tensile 
srength 


Fig.4.3 Split Tensile Strength of Cylinder at 7days, 14 
days & 21 days 



1 2 3 


■ 7J4,2S 
Days curing 
compressive 
strength cubes 



Fig.4.4 Casting of ferrocement laminate 


@ IJTSRD | Unique Paper ID - IJTSRD30685 | Volume - 4 | Issue - 3 | March-April 2020 


Page 733 



























International Journal of Trend in Scientific Research and Development (IJTSRD) @ www.ijtsrd.com elSSN: 2456-6470 


4.3. STRENGTHENING OF RC BEAM 


Beam 

designation 

Details of specimens 

Description 

Type 

of 

loading 

No. of 
layers 

% of Recron- 
3S fibre in 
ferrocement 
laminate 


CB 


- 

Control specimen without 

laminate 


FLB 

3 

0 

Ferrocement Laminated Beam 


FLB 0.5% 

3 

0.5 

Ferrocement Laminated Beam 

with 0.5% of Recron-3S fibre 


FLB 1% 

3 

1 

Ferrocement Laminated Beam 

with 1% of Recron-3 S fibre 

Static 

FLB 1.5% 

3 

1.5 

Ferrocement Laminated Beam 

with 1.5% of Recron-3 S fibre 



Table 4.2 Details of test specimen 


5. RESULTS 

5.1. EXPERIMENTAL RESULTS OF RC BEAMS UNDER 
TWO POINT LOADING 

5.1.1. FIRST CRACK LOAD 


45 1 



CB FLB FLB FLB1% FLB 
0.5% 1.5% 


Specimen 

Fig.5.1 First crack load of RC beams 


The beams and laminates have been cured for 28 days. After 
currying, all the specimens have been allowed to surface dry 
for 24 hours at room temperature. The anxiety facet of the 
beams and bonding face of the ferrocement laminates have 
been roughened the use of wire brush to take away the floor 
laitance and to expose the tough surface. After floor 
preparation, the adhesive issue i.e., epoxy resin had been 
blended totally and utilized to the organized floor of beams 
and ferrocement laminates the usage of brush. Then 
ferrocement have been positioned in position. The beams 
bolstered with ferrocement laminates had been allowed to 
treatment in air for 7 days. Details of check specimens are 
given in the desk 4.2. Figure.4.5 suggests the utility of epoxy 
resin on beams and laminates and Figure.4.6 suggests the 
bolstered beam with ferro cement laminate. 



Fig. 4.5 Application of epoxy resin on RC beams and 
laminates 



Fig. 4.6 Strengthened RC beam 


ULTIMATE LOAD 



CB FLB FLBO.5% FLB1% FLB1.5% 
Specimen 

Fig.5.2 Ultimate load of RC beam 
5.1.3. LOAD VS DEFLECTION COMPARISON 



CB-L 

fib 

FLBO.5% 

FLB1% 

FLB1.5% 


Deflection (mm) 


Fig. 5.3 Load Vs deflection curve 


@ IJTSRD | Unique Paper ID - IJTSRD30685 | Volume - 4 | Issue - 3 | March-April 2020 


Page 734 




























International Journal of Trend in Scientific Research and Development (IJTSRD) @ www.ijtsrd.com elSSN: 2456-6470 


5.1.4. DUCTILITY FACTOR 

5 



CB FLB FLB 0.5% FLB1% FLB1.5°/o 


Specimen 

Fig 5.4 Ductility factor of RC beams 

5.1.5. ENERGY ABSORPTION 



s 0.5% 1.5% 


Specimen 

Fig 5.5 Energy absorption of RC beams 

5.1.6. STIFFNESS 


20 n 



CB FLB FLB FLB 1% FLB 
0.5% 1.5% 


Specimen 

Fig 5.6 Stiffness of RC beams 
5.2. MODE OF FAILURE 

Flexural failure was once determined for all specimens. In 
ideal beams, cracks had been huge and few in numbers. In 
ferrocement encased beams, the cracks have been greater in 
numbers and the crack width was once additionally small 
which is proven in Figure.5.7. 



Fig 5.7 Crack patterns of tested specimens 


6. CONCLUSION 

> The addition of ferrocement laminate to the anxiety face 
of the RC beams drastically delays the first crack load. 

> The epoxy resin used for bonding the ferrocement 
laminates to the anxiety face of the RC beams ensures 
that the bond line does now not wreck earlier than 
failure of beam. 

> The failure of the composite beam is characterised by 
means of improvement of flexural cracks over the 
anxiety zone. 

> The beam bolstered with ferrocement laminate 
containing 1% of Recron-3S fibre, had a lengthen in the 
first crack load, most closing load and discount in mid¬ 
span deflection evaluating with that of manage beam. 

> The addition of ferrocement laminate to the anxiety face 
of the bolstered concrete beams significantly delays the 
first crack load. 

> Mechanical homes such as load carrying capacity, 
ductility thing and power absorption potential was once 
observed to be multiplied for bolstered beams. 

> The epoxy resin used for bonding the ferrocement 
laminates to the anxiety face of the bolstered concrete 
beams ensures that the bond line does now not spoil 
earlier than failure of the beam. 

> The failure of the composite beam is characterised by 
way of improvement of flexural cracks over the anxiety 
zone. 

> Similarly, outcomes from analytical find out about goes 
in hand with the experimental values. 

REFERENCES 

[1] Alaa A. Bashandy (2013)"Experiments on flexural 
strengthening of reinforced concrete beams using valid 
strengthening techniques", Acta Technica Napocesis: 
civil Engineering and Architecture, Vol.56, No.l, pp.36- 
50. 

[2] Damyanti G Badagha and Modhera. C. D (2013) 
"Studies on harden properties of mortar using 
polyester fibre", International Journal of Advances in 
Engineering and Technology, Vol.6, No.3, pp.1154- 
1159. 

[3] Ezzat H. Fahmy, Yousry B. I. Shaheen, Ahmed Mahdy 
Abdelnaby and Mohamed N. Abou Zeid (2014) 
"Applying the ferrocement concept in construction of 
concrete beams incorporating reinforced mortar 
permanent forms", International Journal of Concrete 
Structures and Materials, Vol.8, No.l, pp.83-97. 

[4] Ezz-Eldeen H. A. (2015) "An experimental study on 
strengthening and retrofitting of damaged reinforced 
concrete beams using steel wire mesh and steel 
angles", International Journal of Engineering Research 
and Technology, Vol.4, no. 5, pp.164-173. 

[5] Ganapathy. L and Sakthieswaran. N (2015) 
"Strengthening of reinforced cement concrete beam 
using fibrous ferrocement laminates", International 
Journal of Science and Engineering Research, Vol.3, 
No.5. 

[6] Ganesan and shyju P. Thadathil (2005) "Rehabilitation 
of reinforced concrete flexural elements using 
ferrocement jacketing", Journal of structural 
engineering, Vol.31, No.4, pp.275-280. 


@ IJTSRD | Unique Paper ID - IJTSRD30685 | Volume - 4 | Issue - 3 | March-April 2020 


Page 735 




















International Journal of Trend in Scientific Research and Development (IJTSRD) @ www.ijtsrd.com elSSN: 2456-6470 


[7] Hani H. Nassif and Husam Najm (2004) "Experimental 
and analytical investigation of ferrocement-concrete 
composite beams", Cement and Concrete Composites, 
Vol.26, pp.787-796. 

[8] Khan. S. U, Nuruddin. M. F, Ayub. T and Shafiq. N 
(2013) "Effects of ferrocement in strengthening the 
serviceability properties of Reinforced concrete 
structures", Advanced Material Research, Vol.690, 
pp.686-690. 

[9] Khan. S. U, Rafeeqi. S. F. A and Ayub. T (2013) 
"Strengthening of RC beam in flexure using 
ferrocement", IJST, Transactions of Civil Engineering, 
Vol.37, No. C+, pp 353-365. 

[10] Kondraivendhan. B and Bulu Pradhan (2009) "Effect of 
ferrocement confinement on behavior of concrete", 
Construction and Building Materials, Vol.23, pp.1218- 
1222. 

[11] Malathy. R, Sridhar. J and Sangeetha. R. K (2014) 
"Flexural strengthening of reinforced concrete beams 
using ferrocement laminates with partial replacement 
of fine aggregate by steel slag", Journal of Engineering 
and Technology, Vol.4, pp.123-126. 

[12] Md. Motiur Rahman, Tahmina Tasnim Nahar and Anish 
kumer saha (2014) "Effect of wire mesh on the 
strength of R.C.C beams repaired using ferrocement 
layers", International Journal for Research and 
Development in Technology, Vol.l, No.l, pp.13-18. 

[13] Naaman.A.E and Victor C.Li (2004) "Bending response 
of hybrid ferrocement plates with meshes and fibers", 
Journal of Ferrocement, Vol.34, No.l, pp.275-288. 

[14] Naveen G. M and Suresh G. S (2012) "Experimental 
study on light weight ferrocement beam under 
monotonic and repeated flexural loading", 


International Journal of Civil and Structural 
Engineering, Vol.3, No.2, pp.294-301. 

[15] Prem Pal Bansal, Maneek Kumar and Kaushik. S. K 
(2005) "Effect of wire mesh orientation on strength of 
beams retrofitted using ferrocement jackets", 
International Journal of Engineering, Vol.2, No.l,pp.8- 
19. 

[16] Raj kumar. D and Vidivelli. B (2010) "Acrylic rubber 
latex in ferrocement for strengthening reinforced 
concrete beams", American Journal of Engineering and 
Applied sciences, Vol.3.No.2, pp.277-285. 

[17] Raj Kumar. D and Vidivelli. B (2010) "Performance of 
SBR latex modified ferrocement for repairing 
reinforced concrete beams", Australian Journal of Basic 
and Applied Sciences, Vol.4, No.3, pp.520-531. 

[18] Sakthivel. P. B and Jagannathan. A (2012) "Fibrous 
ferrocement composite with PVC-coated weld mesh 
and bar-chip polyolefin fibers", International Journal of 
Geomate, Vol.3, No. 2, pp.381-388. 

[19] Sandesh S Patil, Ogale. R. A and Arun Kr. Dwivedi 
(2012) "Performance of chicken mesh on strength of 
beams retrofitted using ferrocement jackets", IOSR 
Journal of Engineering, Vol.2, No.7, pp.1-10. 

[20] Sayyed Shoaib, Swayambhu Bhalsing and Pankaj 
Autade (2014) "Behaviour of hybrid ferro fibre 
reinforced concrete under tension", International 
Journal of Innovative Research in Science, Engineering 
and Technology, Vol.3, No.4, pp.508-513. 

[21] Shinde. V. M and Bhusari. J. P (2013) "Response of 
ferrocement confinement on behavior of concrete 
short column", IOSR Journal of Mechanical and Civil 
Engineering, Vol.2, pp.24-27. 


@ IJTSRD | Unique Paper ID - IJTSRD30685 | Volume - 4 | Issue - 3 | March-April 2020 


Page 736