Use of Waste Tier in Construction of Bitumen Road-A Review
Use of Waste Tier in Construction of Bitumen Road-A Review
org
ISSN (e): 2250-3021, ISSN (p): 2278-8719
PP 19-24
Abstract: This paper is based on the review study on waste tier generation, Its environmental problem, and its
use in construction of the bitumen road. The growth rate of population which depends upon on vehicles is the
backbone of economic development of any country. India is the second fast growing automobile industry in the
world. In today’s era, solid waste management is the thrust area. On the other side, the traffic intensity is also
increasing. As a result amount of waste tires is also increasing. The increasing in consumption of waste tire has
created many problems such as increasing landfill space, environmental pollution and causing health hazards
to living being. Parallel to this is tremendous increasing of roads construction as a result of heavy traffic on
roads. This study reviews regarding the use of crumb rubber (waste tires in powder form) in bitumen using the
wet process. The study focuses on the crumb rubber as a replacement to the total weight of bitumen. using of
crumb rubber when in the reinforcement of asphalt is considered as a smart solution for sustainable
development by reusing waste materials, and crumb rubber modifier (CRM) could be an alternative polymer
material for improving hot mix asphalt performance properties. This paper is a critical review on the use of
crumb rubber in reinforcement of asphalt pavement will be presented and discussed. this paper is a review on
the effects of CRM on the stiffness, rutting, and fatigue resistance of road pavement construction.
Keywords: Crumb Rubber, Asphalt Concrete, Tire.
I. Introduction
The rapid growth rate of population of India has resulted in an overall count of around 1.35 billion
people which represents almost 17.85% of the world’s total population. This huge crowd is creating serious
impact on environmental assets and resources of the nation. Such growths not only demand resources for
sustenance but also need good infrastructure for mobility, which adds huge amount of non-biodegradable solid
wastes in the ecosystem. According to a GOI report, “National Highways Development Project, road network of
India is growing at an annual rate of 4% since 1951 while the vehicles are increasing at a much faster rate of
around 12% per annum. Because of this higher rate of increment of vehicles on the roads as compared to the rate
of construction of roads, have resulted in the formation of transverse and longitudinal cracks, potholes and
subgrade. At the same time as the traffic on road increase generation of the waste tire also increase. Considering
the large amount of material recycled from tires, this material should become the subject of worldwide research
study on its utilization potential. So it became very necessary to search new potential uses of recycled tires in
construction, attention is focused primarily on their use in asphalt mixtures, which are applied to different
structural layers of road pavement. The experimental road section at Mala Ida (Slovakia, Kosice region) consists
of asphalt concrete along with the addition of crumb rubber. The studied asphalt mixture was developed within
the project "NFP 26220220051 Development of progressive technologies for utilization of selected waste
materials like rubber and plastic in road construction engineering, supported by the European Union structural
funds" at the Department of Geotechnics and Traffic Engineering, Technical University of Kosice.
After the asphalt mixture went through laboratory testing, an experimental road section was
constructed. The original surface layer of this road was replaced with asphalt mixture with addition of crumb
rubber. Crumb rubber is an elastic material and its behavior could improve classic asphalt mixtures in loaded
roadways. Asphalt mixtures can be modified with crushed rubber in different ways. Properties of asphalt
mixtures with added rubber have been monitored using wet as well as dry methods. The wet method is based on
mixing crushed rubber and asphalt binder at elevated temperature, and the final product is asphalt rubber binder.
The dry method involves replacement of part of the aggregate with crumb rubber. The wet method for asphalt
rubber pavement composition can be used in preparation for this study. The rubber content can be chosen with
regard to the aggregate and binder content.
Natural asphalt is a naturally occurring hydrocarbon mineral that is high in asphaltense and high in the
Nitrogen. When crumb rubber added to asphalt it dramatically increases the asphalt's viscosity, lowering
penetration while increasing the softening point. The crumb rubber is first chemically treated and then is used
to rapidly blend into asphalt. The elasticity and softening point of the asphalt increasing after addition of rubber
it also gives the additional binding strength,. Carbon present in rubber acts as an anti-oxidant and prevents
asphalt from ageing and oxidization.
Basically, RTR-MBs cannot be used wherever conventional asphalt mixes or asphalt surface treatments are
needed. The lower viscosity of No-Agitation RTR-MB implies the usage of less binder per unit area (5–6%
binder content) indicating less performance life than if High-Viscosity RTR-MB is used (8–10% binder
content). In fact, the ability to inject more binder in the mix translates to better fatigue and reflective cracking
performance.
Tomas Ucol- Ganiron J. (2013) [5] Author concluded that Gradation of the asphalt mixture with scrap
tire is lower in percentage retained 4.76 mm sieve than the conventional one for both marshall and immersion-
compression tests. It was observed that bulk specific gravity of the design mixture has a lower result than the
conventional for Marshall Test. Since scrap tire is not so hard as the crushed-stone aggregates, the Marshall
stability values of the asphalt-aggregate-tire mixes were consistently lower as compare to control mixes without
any scrap tire. It was also found that the tire which is cubical in shapes tend to absorb some of the energy
imparted to compact a sample resulting in a weaker aggregate structure than a mix with no tire in it. For
Marshall test The stability of the design mixture is twice lower than the conventional one, and constitutes a
lower value in terms of flow. The density of the design mixture is lesser than the conventional. The stability of
the mixture of asphalt depends on the grading of the aggregates, temperature and size of scrap waste tire. The
advantages of scrap waste tires are: it mitigates roads noise and lessen the number of waste tires. In terms of
Marshall Test, the longer rate of curing, the higher stability acquires. For Immersion-Compression test, the rate
of curing by maximum 4 days will give the maximum value for water resistance for the road surface.
R S Deshmukh (2015) [6] The Author concluded that, Strength of the road increased & Better
soundness property. Better resistance to water & water stagnation. No stripping & have no potholes. Increased
binding & better bonding of the mix. Optimum content of waste rubber tires to be used is between the range of
5% to 20%. Modifies the flexibility of sub surface layer Problem like thermal cracking and permanent
deformation are reduce in hot temperature region after addition of waste tires as rubber aggregate.
Manoj Sharma. et al. (2016) [7] Author concluded that the basic reason for using RTR-MB’s is that it
provides significantly improved engineering properties over conventional paving grade bitumen. The most
important benefit is to withstand against the high climate, as generally in many parts of north India temperature
reaches 40-60 ⁰c. In these temperature RTR-MB’s shows physical and rheological properties significantly
different than those of neat paving grade bitumen likewise reduced several properties like fatigue, rutting,
reflection cracking, and improved oxidation resistance, aging and better chip retention due to thicker binder
films with additional increased viscosity that permit greater film thickness in mixed pave without bleeding and
excessive drain down. It also shows that greater values of the elasticity and resilience especially at high
temperature. This method proves to be very useful in Indian as the availability of waste rubber is in abundant
and there is also no need of any special arrangement to prepare them for the use in road construction.
Prof. S. B. Patil. et al. (2016) [8] Author concluded that Rubberized bitumen is used extensively in
California, Arizona and Texas in the USA, in several countries of Western Europe, and in South Africa. It is
also used to a lesser parts of Canada and in a dozen more states in the USA. Its benefits are many which
including reduced long-term road maintenance and expense, significant noise reductions, improved traction and
reduced accident rates in wet road conditions. Rubberized bitumen is a less expensive application when used as
a thin top course over failed pavement that would otherwise need replacement. It is less expensive to maintain
per lane-kilometer in years 6 through 15 of pavement life over conventional pavements, and the same in years 1
through 5. Rubber bitumen makes urban environments more habitable as it significantly reduces noise as
opposed to concrete pavements, and also is quieter than bituminous pavements;. It significantly improves wet
surface traffic safety. It creates less of a “heat island” effect than with concrete pavement at surface. In an Open
Grade Friction Course it provides better surface road drainage. It is a hugely beneficial use for post-consumer
waste tire materials, using about 1,000 waste passenger tires per lane mile.
H.T. Tai Nguyen et al. (2017) [9] Author concluded that the dry process, CR is used in hot mix asphalt
as a replacement for parts of coarse and fine aggregate, resulting in a preference for gap gradations, and
aggregate does not appear in the dimensions of the added CR. Furthermore, the work of designing a gradation
curve of aggregate corresponding to the added rubber powder is quite complicated because the melting of fine
CR particles will occur at high temperatures. For example, the chunk rubber process could consume CR up to
12% by weight of the mixture. They have concluded after conducting various test on the bitumen sample like
The CR contributes to the significant improvement in the Marshall stability and rutting resistance of asphalt
concrete. The optimal CR content in mixtures of dense gradation and SMA gradation are 1.5% and 2%,
respectively. And At the optimal content of CR, the rutting resistance of dry process asphalt mixtures is as good
as that of SBS (Styrene-Butadiene- Stryrene). and CR modified asphalt mixtures using wet process. Therefore,
CR modified asphalt mixtures using dry process can be used in flexible pavement to mitigate rutting distress
and, on the other hand, promote the recycling of waste tires, contributing to the protection of environment.
Olga Frolova et al. (2017) [10] The paper was created in order to demonstrate the possibilities for
reducing car noise levels by using low-noise asphalt pavement. asphalt mixture with the addition of crumb
rubber from used tires showed good acoustic properties. Roughness of the mixtures was studied in in-situ
conditions, on the wearing course of the experimental section (with crumb rubber) and the SMA (Stone Mastic
Asphalt) section three years after the mixtures were laid. According to the results shown in this figure, the
roughness of the CR mixture was lower than that of the SMA mixture. In recent studies it is find out that the use
of crumb rubber modified binders produced higher stiffness modulus than the same binder without crumb rubber
on mixtures sampled and compacted in the laboratory. According to the results, roughness could be potentially
responsible for the higher sound emissions of SMA pavement. In order to achieve noise mitigation in overall
noise emissions due to this surface property lower roughness values would be necessary. One of the aims of this
work was to find out the existence of a good correlation between tire/pavement sound levels and the roughness
surface characteristics in an in-service asphalt mixture with crumb rubber content.
Nitu H. Deshmukh Et al.(2017) [11] Author conducted the test which were done for normal bitumen
and modified bitumen with 0%, 8%, 10%, 12%, and 14% of rubber waste content. From the result of the test,
the penetration value for normal bitumen was 69 mm. The penetration value decreased with the increased
amount of the rubber crumb waste added. Lower penetration value prove that grade of asphalt is harder, giving
additional strength to the road and reduces water damage. Softening Point Test was done for normal bitumen
and modified bitumen with 0%, 8%, 10%, 12%, and 14% of rubber waste content. From the result of test, the
softening point for normal bitumen was 42.75˚c. Softening Point increased with the increased amount of the
rubber waste added. The result showed that the bitumen becomes less susceptible to temperature changes as the
content of rubber waste increased. Ductility test was done for both normal bitumen and modified bitumen with
0%, 8%, 10%, 12%, and 14% of rubber waste content. The result found that the rubber waste added will harden
the bitumen. The bitumen becomes more viscous and harden, which would be useful to obtain stiffer bitumen
asphalt.
Shubham Bansal et al (2017) [12] Discarded waste materials like crushed plastic bottles, thrown away
polythene bags and used rubber tires were the minor constituents of the binder along with bitumen as major
constituent. Shredded plastic waste, having particle size around 650 microns with specific gravity 1.18 was used
in the binder mix. All binders were divided into three series namely A, B and C. Series A and B represents the
binary mixes i.e., Bitumen (B) + Plastic (P) and Bitumen (B) + Rubber (R) respectively while Series C is the
tertiary mix with varying proportion of plastic and rubber both in bitumen. All the mixes having varying
percentages of binder constituents are represented as Bitumen Mix (BM) as illustrated in table 1. Penetration
test, Ductility test, Softening Point test and Specific gravity test were performed to analyze the physicochemical
properties of various binders.
Fig.1-Crumb Rubber
Mixing: Shredded plastic and rubber was mixed with bitumen at a temperature range between 200ºC to 220ºCin
pre-determined proportions. Plastic replacement in the binder was in the order of 4%, 6%, 8% and 10%, while
the rubber replacement was 5%, 10% and 15%.
Binder testing: Physicochemical properties of binders were tested under Indian Standard test conditions. Results
of the tests performed on non-modified bitumen and modified bitumen has been shown in Table 1.
Table. 1: Physical Properties of Binders (CM – Control Mix , B – Bitumen, P – Plastic, R –Rubber, BM -
Bitumen Mix).
Penetration Specific
Ductility Softening Viscosity
Serial No. Composition (25°C, 100g, Gravity
(25°C) Point (135°C)
5sec) (27°C)
Test ASTM: ASTM: ASTM: ASTM:
ASTM: D5-97
Method D113 D36 D70 D2170
Units mm cm °C ----- cST
*CM 100% B 67 82 51.2 1.02 274
Series A
BM1 96% B + 4% P 64.5 79 53.5 1.05 304
BM2 94% B + 6% P 63 74 54.5 1.07 327
BM3 92% B + 8% P 59.5 71 56 1.09 350
BM4 90% B + 10% P 56.5 69 59 1.12 385
Series B
BM5 95% B + 5% R 61 73 55.8 1.01 338
BM6 90% B + 10% R 57 69 57 1.03 412
BM7 85% B + 15% R 49 59 59.5 1.07 433
Series C
91% B + 4% P +
BM8 63 70 56.8 1.04 357
5% R
84% B + 6% P +
BM9 59 62 60 1.07 477
10% R
77% B + 8% P +
BM10 56 54 62 1.14 495
15% R
*Specified Limits
(BIS Pure Bitumen 60-70 > 75 40 - 55 > 0.99 >150
-73: 2006)
Table 2. Stability-Flow and Volumetric analysis results of BC samples for non-modified and modified
mixes.
Test Method Composition Marshall Marshall Bulk Density Air Voids Voids in
Stability (60°C) Flow (60°C) mineral aggregate
ASTM: D1559 ASTM: D1559 ASTM: D2726 ASTM: D3203 ASTM: D1559
Units kN mm g/cc % %
*CM 100% B 9.06 3.8 2.320 3.72 12.07
Series A
BM1 96% B + 4% P 9.21 2.56 2.299 4.23 12.82
BM2 94% B + 6% P 9.91 2.64 2.318 4.28 12.93
BM3 92% B + 8% P 10.54 3.35 2.362 4.31 13.11
BM4 90% B + 10% P 10.01 3.79 2.271 4.77 13.66
Series B
BM5 95% B + 5% R 10.45 2.84 2.281 4.01 12.92
BM6 90% B + 10% R 13.10 3.7 2.328 4.27 13.53
BM7 85% B + 15% R 8.75 5.25 2.242 4.52 13.34
Series C
91% B + 4% P +
BM8 11.40 3.4 2.288 4.32 13.43
5% R
84% B + 6% P +
BM9 13.89 3.9 2.331 4.69 14.181
10% R
77% B + 8% P +
BM10 10.21 4.6 2.304 5.09 14.322
15% R
*Specified
Bituminous
Limits >9 2-4 - 3-6 >12
Concrete Mix (Grade 2)
(MORTH)
Table 3: Cost comparison of Bituminous Concrete mix with and without additives.
BC layer thickness
Composition Bitumen Cost Cost Reduction
/ length
Code used IRC 37:2012
Units lakhs 50 mm/1km %
CM 100% B 7.092 50 mm/1km -
Series A
BM1 96% B + 4% P 6.746 50 mm/1km 4.88
BM2 94% B + 6% P 6.661 50 mm/1km 6.077
BM3 92% B + 8% P 6.643 50 mm/1km 6.331
BM4 90% B + 10% P 6.248 50 mm/1km 11.90
Series B
BM5 95% B + 5% R 6.624 50 mm/1km 6.599
BM6 90% B + 10% R 6.404 50 mm/1km 9.70
BM7 85% B + 15% R 5.825 50 mm/1km 17.86
Series C
BM8 91% B + 4% P + 5% R 6.365 50 mm/1km 10.25
BM9 84% B + 6% P + 10% R 5.985 50 mm/1km 15.61
BM10 77% B + 8% P + 15% R 5.423 50 mm/1km 23.53
III. Conclusion
Rubber waste which is the major challenge for the environmental can be reduce by re using it to the
bitumen road construction. All the above authors have concluded that the use of waste tires in road can be
improve it near about all the parameter of the bitumen road. Shubham Bansal et al. have written in his research
work that the Marshall Stability result for Bitumen (B)+ Plastic(P) + Rubber(R). Author have also proved that
for BM10 77% B + 8% P + 15% R cost will reduce up to 23.53% which can reduce overall cost of the project.
Thus if we use the waste rubber tires in this way it will no more be the waste and also the environment will be
protected.
Acknowledgements
I would like to express my thanks to the people who have helped me most throughout to my work. I am
grateful to Prof. Naveed Akhtar for his nonstop support for this work, A special thank of mine goes to staff
member of college who helped me out in completing the work, where they all exchanged their own interesting
ideas, thoughts and made this possible to complete my paper with all accurate information.
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