POLYMER ROAD TECHNOLOGY

PRESENTED BY NIKHIL BHOLE (63020) Guided By: Prof. Anupama .A. Bellakki

ROAD-MAP

• Introduction

• Stabilization by Polymer products

• Polymer products used for stabilization and road technology

• Road Preliminaries

• Construction Overview

• Role of Plastic wastes in development

• Key Benefits of Polymer Road Technology

• Conclusion

• References

INTRODUCTION

• Road network plays important role in development of the country. Thus it should consist of best possible infrastructure in all aspects.

• Therefore it is necessary to consider geological aspects and implement necessary modifications in them.

• Modification in soil properties should be done in order to eliminate compatibility issues, and make it economical and environmental friendly.

• Use of Plastic wastes in road construction will benefit the ecology.

1. STABILIZATION

What is stabilization?

• A process in which small quantities of additive(s) (polymers) is used and added to the existing materials which can significantly improve the normal engineering properties of soils, crushed rocks and gravels e.g. CBR, permeability and strength.

How to carry out stabilization?

• Usually carry out in-situ

• Sometimes in a centralized processing plant

Stabilization Technique :

• Stabilizing agent preserves strength of water susceptible gravels by creating a hydrophobic soil matrix between the stones which reduces permeability and limits water ingress ( External Water-proofing ).

• Also the softening and lubricating effect of any moisture that does enter the pavement is much reduced ( Internal Water-proofing ).

Why stabilization must be carried out by polymer ?

• Cyclic load(repetitive & reversal) from traffic caused fatigue failures in pavement

• Above factors render original soil-stabilization less suitable today • Conventional soil-stabilization susceptible to sulphate attack and proved inappropriate for

clayey soils containing excessive fines(> 35% passing the No. 200 sieve) and of high plasticity (P.I. > 10)

• All these suggest modification(s) to original soil-stabilization is necessary in order to meet critical

needs of pavements today. • Tests by renown laboratory, full-scale test pavements and in-service pavements have confirmed

the suitability of various polymer products / solutions as a modifier.

1.4 How Polymer modify Soil-Stabilization?

• Increase modulus of elasticity through connecting cement-coated soil particles by numerous ‘micro-rubber bands’

• The water-holding nature is useful during curing process

• Protect soil-stabilization against harmful effects of chemical compounds in soil, e.g. sulphate

• Prevent penetration and capillary rise of water within soil-stabilization

• Reduce the effects of moisture migration – a major cause of pavement deterioration

Polymer “micro rubberbands”

Advantages: Minimal use of chemical

Efficient & rapid construction

Reduced energy consumption

Environmentally sound

Existing materials can be used

Reduces susceptibility to water

Well proven process

Associated terms with Stabilization :

2. POLYMERS USED FOR STABILIZATION

• Compatibility Measures : Polymer should be : - Water based - Non-toxic - Non-flammable - Non-leaching - Economically preventive or EPA compliant - No dangerous levels of volatile organic compounds

• Other physical properties are :

Boiling Point - 100 C

Specific Gravity @25C : 1.00 – 1.02

Viscosity @25C : 1,200 – 2,000 cps

Miscible in water

pH value @25C : 11.0 – 12.5

Some widely used polymer products in soil stabilization or road technology are :

CORCHEM 5510 Soil Polymer Enzyme

- CORCHEM Corporation ( USA )

Water based Acrylic Polymers

- Constructive Innovations ( UK )

IPPL :

a). IPPL SS-IX : Polymer soil stabilizer

b). IPPL AT-X : Polymer based asphalt

c). IPPL PT-V : Potholes repairing

d). IPPL DT-II : Eliminate dust, Dust suppressant

e). IPPL STA : Sealing and water-proofing

Renolith :

- International Renolith Corporation Ltd. ( Thailand )

TerraDura Polymer Emulsion : Soil stabilization Technology

- NCI Worldwide ( USA )

Soiltech MK-III : Nano polymer stabilizer

- Polypavements ( South Africa ) and IPPL ( India )

Terratech :

a). T-PRO 400HT : Soil stabilization Technology

b). T-PRO 500 : Soil stabilization Technology

Road Preliminaries

Polymer Pavement Construction Overview

• Pavement is outlined and pegged to get proper alignment.

• Modification of soil is undertaken (if required).

• Based on the resources established at site, add Polymer stabilizer to

the Water in the Browser.

• This Admixture of Polymer stabilizer and water is sprayed to the ripped pavement and evenly distributed throughout the pavement material.

• Pulverization on the SSB Pavement after applying the stabilizer admixture.

• Pavement is profiled (to design alignment).

• Pavement compacted to min. 98% of maximum dry density (MDD) and verify in-situ.

• Pavement is open to traffic after 3 days.

• Wearing surface - Bitumen layer is added within 5-7 days.

Construction Machineries and Equipment's

• Hydraulic Motor Grader with back-end ripper

• Tractor with Ripper/Cultivator optional to Hydraulic Motor Grader with back-end ripper or Pulveriser Machine

• Water Browser with min. carrying capacity of 4000/12000 litres with attached sprinkler pump

• Vibratory soil compactor 11 ton capacity Survey equipment set

• D.C.P., N.D.G. testing equipment and Moisture meterGrader and Spreader

Vibro Roller

Pavement Preparation

• Scarify the existing surface and remove tree roots, stumps and

vegetation.

• Remove loose debris if any.

• Dump & Spread the SSB Mix material over the Subgrade /GSB top

layers as required.

• Remove loose debris if any.

• Rip/Furrow the surface to desired depth.

• Remove all particles above the standard grading analysis

Tripper / dumper

Polymer sprinkler

Role of Plastic wastes in development

• Plastic wastes can also be used in construction of roads in economical ways, leading to environmental safety.

• They are processed by following basic processes :

1. Segregation .

2. Cleaning process .

3. Shredding process .

4. Collection process .

Segregation process

cleaning process

shredding process collected plastic

Key Benefits of Polymer Road Technology

• Reduce the need of bitumen by around 10%.

• Reduce the cost to around Rs. 5000/Km. of single lane road.

• Generate jobs for rag pickers.

• Substantial reduction in construction time

• Significant reduction in quarry materials

• Subsequent reduction in construction cost

• Environmental friendly technology

• Superior soil properties

• Toxicity effect is zero

CONCLUSION

• POLYMER modified soil-cement (or RC-Soils) are a well proven soil stabilization process.

• Plastic will increase the melting point of the bitumen .

• A change in today’s traffic loading conditions as compared to previous; notably high traffic volume and heavy axle load have rendered modification of the conventional soil-cement most necessary, if not a must.

• The technique is appropriate for new pavement construction, pavement rehabilitation and recycling works for maintenance.

• Plastic road would be a boon for India’s hot and extremely humid climate where durable and eco-friendly roads which will relive the earth from all type of plastic waste

• This method reduces the dependence and reliance on outside imported quarry products and/or borrowed soil materials during pavement construction. Consequently, it represents not only a time saving solution but also an environmental sustainable & friendly construction and maintenance approach.

• Better homogeneity is achieved through more efficient mixing process and also higher and more

predictable output capacity are realizable. All these are necessary to ensure that desired design outcomes are achieved.

References

• Kumar .V,”Design and construction of haul roads using polymer stabilizers University of Alberta, MSc. Thesis (2000).

• Nabil Mustafa, “Plastics Waste Management”, Canadian Plastics Institute, Toronto, Canada, Marcel Dekker, Inc. (1993).

• Vasudevan .R, “Utilisation of waste plastics for flexible pavement”, Indian Highways (Indian Road Congress), Vol. 34, No. 7 (July 2006).

• Oliver, J.W.H., “Development of a Heavy Duty 14mm Mix for Main Roads”, WA. Contract report for Main Roads Western Australia Report RC6052A ARRB Transport Research, Australia (April 1998).

• Hagos, ET, “Characterisation of Polymer Modified Bitumen”, Dienst Weg, Netherland (2002).

• Marais, CM, “Advances in the Design and Application of Bituminous Materials in Road Construction”, University of Natal, (November 1979) PhD.

THANK YOU