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NAME OF THE INSTITUTE, PARUL UNIVERSITYNAME OF THE INSTITUTE, PARUL UNIVERSITY 1
Presented by Guided by
Mohmedali Chunawala E Ms. Megha Thomas
(150303209003) Assistant Professor
Dissertation Presentation
on
“ Study of Mechanical properties of Concrete
on Inclusion of Crumb rubber and Nylon
fibres ” Title”

Contents
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 Introduction
 Aim
 Objectives
 Features
 Paper published certificate
 Advantages
 Literature review summary
 Work done
 Conclusion
 References

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Introduction
 With the rapid development of modern transportation and
manufacturing industry, a great amount of scrap rubber is
produced.
 The treatment and comprehensive utilization of waste tire and
rubber products are highly concerned. Currently, the produced
crumb rubber powder is widely used to incorporate organic or
inorganic composite materials .
 Concrete mixed with crumb rubber has better toughness and
impact strength than ordinary concrete, and also has better heat
insulation and sound insulation properties.
 However, crumb rubber has bad interface compatibility with
inorganic materials.

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 Crumb rubber concrete are structural materials that are gaining importance
quite rapidly due to the increasing demand of superior structural
properties.
 This is the concrete formed by the addition of a polymer styrene butadiene
rubber emulsion (SBR) to Fibre Reinforced Concrete to produce textile
fibre concrete.ie nylon fibre.

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 These composites exhibit attractive tensile and compressive
strengths, low drying shrinkage, high toughness, high energy
absorption and durability.
 This is due to the tendency of propagating micro-cracks in
cementitious matrices to be arrested or deflected by fibres, which is
guaranteed by the local bond between fibres and matrix

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Aim
 To study mechanical properties of concrete on
addition of crumb rubber and nylon fibre to the
concrete matrix at different dosages.

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 To study the mechanical properties like Compressive
strength and flexural strength of concrete on inclusion of
Crumb rubber and nylon fiber with different dosages.
 To study the quality of concrete on inclusion of Crumb
Rubber and nylon Fibre using rapid chloride penetration
test.
 To evaluate possible advantages of using crumb rubber
and nylon fiber together in concrete.
OBJECTIVES

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The various by-products/wastes which has been found
to be effective incorporated in concrete are:

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TYPES OF TEXTILE FIBRES

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 Improve some mechanical properties of concrete.
 More energy absorption.
 Better ductility and better crack resistance.
 High workability and high toughness.
 Light weight concrete.
 Sustainable concrete.
ADVANTAGES CRUMB RUBBER IN
CONCRETE

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 Used in pavements and tunnel linings.
 Used in airport pavements.
 Bridge deck slab repairs.
 Used where there are more chances of crack development.
 Fire resistant structure.
Protection from freezing and thaw.
Applications of Crumb rubber Concrete

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ADVANTAGES OF NYLON FIBRE IN
CONCRETE
Advantages:
1) Low density
2) Low cost
3) Excellent relation between weight and
strength, possessing higher
mechanical properties than steel for a
reduced weight.
4) Good relation between thermal
resistance and thickness (good thermal
insulation).
5) Good behaviour as an acoustic insulator.

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LITERATURE REVIEW

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.Author Year Title/Journal Conclusion
Zeno,Daniela,Ovidiu,
Mihai.
2016 ‘Sound absorbing materials
made by embedding crumb
rubber waste in a concrete
matrix’.
Elsevier
Materials made of concret
with added SBR were
obtained and it was found
that the sound absorption
coefficient was above 0.5.
Afia S.Hameed,A.P
Shasikala.
2016 Suitability of rubber concrete
for railway sleepers. Elsevier
Presence of crumb rubber
in concrete has increased
the resistance to crack
initiation under impact
load by 80-110%.
Giulo,Piergiorgio,Mat
teo,Valeria.
2016 Crumb rubber in cold recycled
bituminous mixes.
Elsevier
The replacement of fine
RAP with Crumb rubber
improved the self-
compaction of mixture…..

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Xiaobin,Changwen,Ji
aping,Jinxiang.
2012 Influence of crumb
rubber on frost
resistance of concrete
and effect mechanism.
Elsevier
It is detrimental to improve the
freeze-thaw resistance of CRC
when the volume of 6 mesh
crumb rubber exceeds 60kg/m3
Iqbal Marie. 2017 Thermal conductivity of
hybrid recycled
aggregate-Rubberized
concrete. Elsevier
The thermal conductivity over
RCA mixes of same %of 20%.
Bashar,Khandekar,Ja
ckson Ting,Grace
Wong.
2012 Properties of Crumb
rubber Hollow concrete
block. Elsevier
CRHCB has higher electrical
resistivity than conventional
hollow concrete block.

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OB ozigir,F Giraridi. 2016 Effect of synthetic fibre
reinforcement on
concrete mechanical
and thermal properties.
Elsevier
We obtained a high
performance concrete thermal
storage material using Portland
Limestone cement,recycled
nylon fibres and aggregates as
raw materials.
P.S song,S whang. 2016 Influence of nylon fibres
with polypropylene
fibre in concrete.
Elsevier
The shrinkage crack reducing
potential of the nylon fibres in
mortar went moderately ahead
of that of polypropylene fibres.
Tushar R
More,Pradip jadhav.
2013 Use of waste tyres as
aggregates in concrete
mixes. Elsevier
The concrete with crumb
rubber usually cant be used as a
structural elements.

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Sr.
No
Parameters
Result
Obtained
Requirements as per
IS:12269(1987)
1
Fineness-Specific Surface (m2
/Kg)
by sieve Analysis
285
Minimum
-225.0(m2/Kg.)
2 Standard consistency in (%) 30% ---
3 Setting time in Min. ---
(a) Initial setting time(Minute) 47 min Minimum - 30 Minute
(b) Final setting time(Minute) 260 min Maximum- 600 Minute
4
Soundness
(By Le-chatlier Expansion in mm)
0.42 mm Maximum-10.00 mm
 Cement
The physical properties of cement used for the experimental work was satisfying all the criteria of IS: 12269 and IS:4031 are
as shown in Table-1.
Materials and Work done

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Sr. No.
IS Sieve
Size
Wt.
Retained
(gm)
Cum.
Wt.
Retaine
d
(gm)
Cumulative Wt.
Requirements
as per
IS : 383(1970)
Retained
(%)
Passing
(%)
1 10 mm 0.0 0.0 0.0 100.0 100
2 4.75 mm 45.8 45.8 4.58 95.4 90-100
3 2.36 mm 128.8 174.6 17.46 82.5 75-100
4 1.18 mm 188.7 363.3 36.33 63.7 55-90
5 600 µm 254.3 617.6 61.76 38.2 35-59
6 300 µm 215.4 833.0 83.30 16.7 08-30
7 150 µm. 149.2 982.2 98.22 1.8 0-10
8 Pan 17.7 999.9 99.99 0.0
Total 999.8 301.7 ---
Fine Aggregates (Sand)
The sand used for the experimental work was satisfying the criteria as shown in Table-2.
Table 2: sieve analysis of fine aggregates

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1 Zone of Sand II --
2 Fineness Modulus of sand 3.0 --
3 Water Absorption (%) 1.1 Max - 2 %
4 Sp. Gravity of Sand 2.67 2.6 - 2.7
5 Silt Content in % (finer than 75 µ) 2.2 max.- 3 %
Table 3: Physical Properties of Fine Aggregate (Sand)
Physical Properties
Continue…

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Sr. No.
IS Sieve
Size
Wt.
Retaine
d (gm)
Cum.
Wt.
Retaine
d
(gm)
Cumulative Wt.
Requirements
as per
IS : 383(1970)
Retaine
d (%)
Passing
(%)
1
12.5
mm
0.0 0.0 0.0 100.0 100
2 10 mm 296.3 296.3 14.8 85.2 85-100
3
4.75
mm
1545.0 1841.3 92.1 7.9 0-20
4
2.36
mm
139.0 1980.3 99.0 1.0 0-5
Pan 19.6 1999.9 100.0
Total 1999.9 205.9
Physical Properties
1 Water Absorption in (%) 0.91 Max. - 2.0 %
2 Sp. Gravity of Agg. 2.78 2.6 - 2.9
3 Elongation Index in (%) 11.96 --
4 Flakiness Index in (%) 12.74 --
5 Aggregate Impact value (%) 11.19 Max. -45.0 %
6 Aggregate Crushing Value (%) 12.81 Max. - 45.0 %
7 Aggregate Abrasion Value (%) 13.36 Max. - 45.0 %
Coarse aggregates: Sieve analysis and physical properties of 20mm coarse aggregates

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Water: Portable water is used
SuperPlatisizer: sulphonated Nepthalene condensates based
TYPICAL PROPERTIES
Physical state Brown Liquid
Chloride content 0.2% max
pH 7.5 ± 0.5
Air Entrainment < 1 %
Dosage 0.6%-1.5% by
weight of cement

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TYPICAL PROPERTIES
Acetone Extract 6 %
Ash Content 7%
Carbon Black 30%
Rubber Hydrocarbon 50%
Retention 1%
Crumb rubber: size between 0.75 to 2mm.

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Sieve
size
Wt. of
rubber
retained
Percent
retained
Cumulative
Percent
retained
Percent
passing
4.75 mm 0 gm 0 0 100
2.36 mm 30 gm 3 3 97
1.18 mm 520 gm 52 55 45
600 mic 360 gm 36 91 9
300 mic 82 gm 8.2 98.2 1.8
150 mic 5 gm 0.5 98.7 1.3
75 mic 2 gm 0.2 98.9 1.1
Pan 1 gm 0.1 99 1
Fineness Modulus: 2.78
Sieve analysis of crumb rubber:

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No. of specimens
Mix Crumb rubber Nylon fibre No. of cubes No. of beams
Control mix 9 3
Mix 1 1% 0% 9 3
mix 2 2% 0% 9 3
Mix 3 3% 0% 9 3
mix 4 0% 2.5% 9 3
mix 5 0% 5% 9 3
mix 6 0% 7.5% 9 3
mix 7 0% 10% 9 3
mix 8 1% 2.5%,5%,7.5% 9 3
mix 9 2% % gives max
strength
9 3
mix 10 3% % gives max
strength
9 3
Mixes of concrete according to % of C.R and Nylon fibre
Work done

Compressive strength 3
33
0
5
10
15
20
25
30
35
40
45
1% C.R + 7.5% N.F 2% C.R + 7.5% N.F 3% C.R + 7.5% N.F
COmpressivestrengthinkN/mm²
Specimen of cubes according to 1%,2%,3% C.R to 7.5% N.F.
7 days
14 days
28 days

RCPT test
Chloride
permeability for
POC concrete with
age Sample
7 days Chloride
Permeability
28 days Chloride Permeability 90 days Chloride
Permeability
Coulo
mbs
Remark Coulombs Remark Coulombs Remark
Mix 1 5126 H 4387 H 3945 M
Mix 2 5389 H 4294 H 3972 M
Mix 3 5174 H 4573 H 3871 M
35

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SCOPE OF WORK
 Durability and plastic shrinkage of rubberized concrete.
 Properties of fresh concrete and hardened concrete with tyre chips
of different size as an addition to the concrete rather than its
replacement with aggregates.
 Effect of surface texture of rubber particles and effect of different
curing methods on rubberized concrete.
 Effects of size of crumb rubber on behaviour of modified concrete.
 The combination of two different types of fibre such as crumb
rubber and steel fibre may tend to provide better performance.

Conclusion
• According to the previous test and results it is concluded that by
increasing the % of Crumb rubber in concrete upto some extent
decreases the compressive strength but the flexural strength
increases and also by addition of nylon fibres on it the
compressive strength increases as by adding 7.5% of nylon
fibres on concrete with addition of crum rubber there is
increment in results,Although the durability can be found by
performing RCPT test.
37

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References
1. Zeno, Bianca-Maria, Daniela, Ovidiu, Mihai. Sound absorbing
materials made by embedding crumb rubber waste in a concrete matrix.
Elsevier 2016 pp 753-763.
2. Afia S. Hameed, A.P. Shashikala. Suitability of rubber concrete for
railway sleepers. Elsevier 2016 pp 32-35
3. Giulo, Piergiorgio, Matteo, Cesare, Andrea, Valeria. Crumb rubber in
cold recycled bituminous mixes: Comparision between Traditional
Crumb Rubber and Cryogenic Crumb Rubber. Elsevier 2014 pp 370-
375.
4. Xiobin, Changwen, Jiaping, Jinxiang. Influence of crumb rubber on
frost resistance of concrete and effect of mechanism. Elsevier 2012 pp
206-213.
5. Iqbal Marie. Thermal conductivity of hybrid recycled aggregate-
Rubberized concrete. Elsevier 2017 pp 516-524.
6. Bashar,Khandaker,Jackson Ting,Grace Wong. Properties of Crumb
rubber Hollow concrete block. Elsevier 2012 pp 57-67.

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References
7. OB ozigir,F Giraridi. Effect of synthetic fibre reinforcement on
concrete mechanical and thermal properties. Elsevier
8. P.S. song, S whang. Influence of nylon fibre with polypropylene fibre
in concrete. Elsevier
9. Tushar R More,Pradip Jadhav. Use of waste tyre as aggregates in
concrete mix. Elsevier
10. IS code- 456-2000, IS code- 10262
11. Concrete Technology Theory and Practice by M.S Shetty (S.Chand
Publications).

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