Use of Rubber as a aggregate

1. BET’S
MOTICHAND LENGADE BHARATESH POLYTECHNIC
THE EFFECT OF WASTE RUBBER ON
STRENGTH OF CONCRETE
DEPARTMENT OF CIVIL
6th SEM

2. THE EFFECT OF WASTE RUBBER ON STRENGTH
OF CONCRETE

3. INTRODUCTION
 Rubber is a naturally occurring polymer, and
a very good one, when added to concrete it
will increase its elasticity, decrease its brittle
point and increase its softening point .
 In General , the purpose of addition of the
rubberized materials to concrete is to
improve its properties and to study its effect
on workability.

4. OBJECTIVES
 The objective of this study is to show the
effect of adding rubber to concrete to
improve the properties of concrete . and the
effect of adding rubber as an aggregate on
the workability , strength of concrete.
 The benefits of the addition of rubber too , to
minimize the risk of pollution, and to study
the deformation properties of Portland
cement concrete with rubber waste additive.

5. LITERATURE REVIEW
 SALEEM SHTAYEH (Department Head of
Construction Technology& management,
Wolaita sodo University.),studied the Utilization
of waste tires in the Production of non –
structural Portland cement concrete .The study
showed that the compressive strength decreases
as percent of crumb waste tires increases .

6. MATERIALS
 The materials used in this research
work are :
 1- Ordinary Portland cement (43grade)
 2- Coarse aggregate (Basalt rock source)
 3- Fine aggregate ( sand, zone 2 ) .
 4- Water ( fresh potable water ) .
 5- Rubberized materials (Tire rubber ) .

7. TYRE RUBBER
 Specific gravity test was conducted on the
rubber aggregate chips and found to be 1.11.
 Density of waste tyre rubber is 1100kg/m3.
 The elastic modulus for tire rubber ranges from
180 pounds per square inch (psi) to 750 psi.
 The Poisson’s ratio of tire rubber is 0.5.

8. METHODOLOGY
 In this study for different types of mixes or
combination is being considered and designed as
per Indian Standard Specification IS: 10262(2009)
 Water cement ratio- The water cement ratio we
have selected according to the grade of concrete
chosen and mix design to be done.
 The 20mm and down size rubber aggregate are used
in concrete.
 The other mixes were made by replacing the coarse
aggregates with 5%,10%,15%, 20%,25%,30%,50%
and 100% of discarded tyre rubber by volume.

9. RUBBER AGGREGATE

10. SLUMP TESTS RESULTS FOR ALL MIXES
Mix Percent replacement
(%)
Averages Slump
MM
A1 0 48
A2 5 52
A3 10 23
A4 15 20
A5 20 15
A6 25 15
A7 30 12
A8 50 10
A9 100 8

11. PERCENT REPLACEMENT BY CRUMB
WASTE TIRES VERSUS SLUMP
0
10
20
30
40
50
60
0 5 10 15 20 25 30 50 100
SlumpinMM
Percentage(%) of Rubber added
Y-Values

12. COMPRESSION TEST OF SPECIMEN

13. AVERAGE COMPRESSIVE STRENGTH AT 28 DAYS TEST RESULTS FOR ALL MIXES.
Mix Percent replacement
(%)
Average compressive
strength at 28 days(N/mm2)
A1 0 29.33
A2 5 24.11
A3 10 26.21
A4 15 22.95
A5 20 15.7
A6 25 13.77
A7 30 10.95
A8 50 5.18
A9 100 1.62

14. PERCENT REPLACEMENT BY CRUMB
WASTE TIRES VERSUS COMPRESSIVE
STRENGTH
0
5
10
15
20
25
30
35
0 5 10 15 20 25 30 50 100
Compressive strength-N/mm2
Y-Values

15. DENSITY TEST RESULTS FOR ALL MIXES
Mix Percent replacement
(%)
Average density
Kgm3
A1 0 2531
A2 5 2478
A3 10 2452
A4 15 2421
A5 20 2349
A6 25 2320
A7 30 2301
A8 50 2128
A9 100 1770

16. PERCENT REPLACEMENT BY CRUMB
WASTE TIRES VERSUS DENSITY
0
500
1000
1500
2000
2500
3000
0 5 10 15 20 25 30 50 100
DensityinKg/m3
Percentage(%) of Rubber added
Y-Values
Y-Values

17. OBSERVATIONS
 1. Compressive strength decreases as the percent of waste crumb
tire replacement increases.
 2. Slump test results decreases as the percent of waste crumb tire
replacement increases.
 3. Density decreases as the percent of waste crumb tire
replacement increases.

18. CONCLUSIONS
 1. Compressive strength decreases as the percent of waste crumb
tire replacement increases.
 2. Slump test results decreases as the percent of waste crumb tire
replacement increases.
 3. Density decreases as the percent of waste crumb tire
replacement increases.
 Recycling of scrap tires suggesting an environmental friendly,
minimises the risk of pollution,
 Cost effective.

19. SCOPE OF STUDY
 As the use of rubber aggregate in concrete
increases the Impact load strength, it can be
used for concrete pavements.
 The rubber aggregate can be used for
architectural purpose as it is light in weight.

20. REFERENCES
 IS 10262 (2009): Guidelines for concrete mix design
proportioning [CED 2: Cement and Concrete]
 IS-456-2000:Plain and reinforced concrete-code of practice
 ASTM C109-02.(American Standard Test Method)
 Concrete technology by M.S.Shetty
 International Journal of Scientific Engineering and Technology
(ISSN : 2277-1581)
 Eldin N.N & senouci A.B.- “RUBBER PARTICLE AS
CONCRETE AGGREGATE”, ASCE journal of materials in
civil engineering1993,5(4),478-496

21. THANK YOU