Asphalt-free technology for sustainable soil roads

REDUCE EXPANSIVITY

BUILD IMPERMEABLITY

INCREASE COMPACTION

Extending the life cycle of roads via innovative new

nanotechnology is of significant importance!

WHAT IS THE PROBLEM?

Unpaved soil roads are the main node of connectivity in most developing countries

These represent more than 90% of the overall road network

The condition of these roads is often neglected and they frequently breakdown under rains

The upkeep and maintenance of soil roads is a major challenge, and a constant financial drain on local governments

Revolutionary Soil Nanotechnology

Water soluble, easy to use spray application

500x reduction in water permeability

3x improvement in strength& load bearing capacity

Environmentally preferred solution

Method of Application

Initial spraying Scarifying treated soil Compaction

Top-layer spraying Finished surface Waterproofing

-OH groups make surface very hydrophilic (water loving):

Capillary rise action leads to high water ingress in soil roads.

Soil / Clay / Sand / Aggregate surface silicate structure before and after reaction

Molecular level hydrophobic zone (water repellent):

4-6 nm Alkyl Siloxane surface that reacts upon contact with particle surface and creates a water repellent layer. The surface is subsequently impermeable to water ingress and protects the under layers from water damage

OUR CHEMICAL ACTION

ORGANO SILANE TREATED SOIL DISPLAYED THE FOLLOWING,

Soil Swelling Reduced by 85 %

Compaction Density Increased by 4%

Sr Parameters MeasureSoil w/o

additive

Soil +

Cement 3%

Soil + Silane 0.75 kg/m3 +

nano polymer 0.75 kg / m3

+ Cement 3%

1 CBR% 7 67 125

% Improvement - 857% 1685%

2 UCSMPa 0.27 1.02 2.43

% Improvement 278% 800%

3

Durability

(Wet – Dry

Cycles)

No. of cycles 0 4 12

IS : 4332

(Part 4)Fails Fails

Passes

(Simulates 20 years life)

CRRI Research : Executive Summary

Sr Parameters MeasureSoil w/o

additive

Soil + Terrasil

@ 0.3 Kg / m3

Soil + Terrasil

@ 0.5 Kg / m3

1 DensityKg / m3 2114.25 2112.75 2121.70

% Improvement - -0.07% 0.35%

2Resilient Modulus

(MR)

MPa 444.82 554.51 610.10

% Improvement 25% 37%

CORPORATION FOR RESEARCH AND DEVELOPMENT , Ecuador Executive

Summary

CH (Black Cotton) Soil, India

Permeability reduced by 500 folds

Cm

/se

c

TERRASIL & WATER PERMEABILITY

Cm

/se

c

TERRASIL & ZYCOBOND : APPLICATION

Spray Terrasil / ZycoBond

Working Direction

Note :

In case equipment are not available, agricultural implements like

ploughs, rotavator etc. can be used.

IN-SITU TREATMENT : FOR SOILS WITH CBR > 4

Open up and scarify soil base up to 150-200 mm. Spray Terrasil solution in water

to achieve OMC and scarify the soil. Allow the treated soil to dry till the moisture

is < 4%.

Spread specified amount of cement (typically 3%) on treated soil and scarify the

soil. Spray ZycoBond solution in water to achieve OMC and scarify.

The dosage of Terrasil is 0.6 to 1.0 kg / m3 and that of ZycoBond is 0.6 kg / m3

After thorough mixing, the soil at OMC can now be compacted using vibro roller.

The compacted soil surface, should now be spray-saturated with Terrasil +

Zycobond solution in water.

Ratio of TS : ZB : Water should be 1:1:200. Spray rate should be 3 litre / m2 or till

saturation.

Allow the surface to dry.

TREATMENT FOR BORROWED SOIL

Select a borrow area with soil CBR of 6 or more.

Open up and scarify soil base up to 150-200 mm. Spray Terrasil solution in water to

achieve OMC AND Scarify the soil. Allow the treated soil to dry till the moisture is < 4%.

Spread specified amount of cement (typically 3%) on treated soil and scarify the soil.

Spray ZycoBond solution in water to achieve OMC and scarify.

The dosage of Terrasil is 0.6 to 1.0 kg / m3 and that of ZycoBond is 0.6 kg/m3

After thorough mixing, the soil at OMC can now be transported to the site and leveled,

followed by compaction using vibro roller. The compacted soil surface, should now be

spray-saturated with Terrasil + Zycobond solution in water.

Ratio of TS : ZB : Water should be 1:1:200. Spray rate should be 3 litre / m2 or till

saturation.

Allow the surface to dry.

DUST CONTROL

NANOPOLYMER – APPLICATION FOR DUST CONTROL

VIRGIN AGGREGATES

@ ambient temp.

RAP @ ambient temp.

Heat Transfer through Radiation.

Temp raises to 200-250 0C

EXHAUST

LIQUID

ASPHALT

@ 160 0C

HOT MIX

BURNER

Prepare ZycoBond solution in water in the ratio 1 : 100 (for the first spray) and spray on Dust /

Gravel surface @ 3 Ltr / m2 (or till saturation).

A ratio of 1 : 200 and 1 : 300 are to be used for 2nd spray (2nd week from construction) and 3rd

spray (in 4th week from construction) respectively to get best bonding and dust control. Allow the

surface to dry after every spray.

Spray of solution prepared in the ratio 1 :300 is recommended every quarter, in the initial two

years, for maintenance. After two years, the maintenance spray should be need based.

18

Projects in India

19Rural Road, Sector 19, Gandhinagar, Gujarat

Subgrade Excavation Scarification

Cement Spreading Spraying Scarification

Construction in Year 2016

20

Compaction Spraying Waterproofing Confirmed

Spraying on Grit Compaction Spraying

Rural Road, Sector 19, Gandhinagar, Gujarat

Construction in Year 2016

21

Observed by Dr. Arvind Swamy, IIT Delhi, Dr. Rakesh Kumar, SVNIT Surat

Water Drop Test DCPT

Rural Road, Sector 19, Gandhinagar, Gujarat

22Rural Road, Sector 19, Gandhinagar, Gujarat

Observed by Road & Building Department

Water Ponding Test

Field Density

Benkelman Beam Deflection

Water Ponding Test

24

Construction in Year 2010Spraying

Tack Coat

WaterproofingConfirmation

Prime Coat Carpet & Seal Coat

Compaction

Clayey Soil CBR 1.3 – 2.1, treated with Multi Layer Waterproofed Envelope

Bharthali - Bharthna Road, Tal. Karjan, Dist. Vadodara, Gujarat

CONTROL

2010 2011

Repaired in

2010

20132012

TREATED

2010 2011 20132012

25

Bharthali - Bharthna Road, Tal. Karjan, Dist. Vadodara, Gujarat

Post Monsoon Performance 2010 – 2013

CONTROL

2015

TREATED

2015

2014

2014

2016

2016

26Bharthali - Bharthna Road, Tal. Karjan, Dist. Vadodara, Gujarat

Post Monsoon Performance 2014 - 2016

27Sayajipura Plant Soil Road & Parking Area, Vadodara, Gujarat

Excavation

Spraying Water Drop Test

Compaction Spraying

Spraying on Top Layer

Construction in Year 2008

2008

28Sayajipura Plant Soil Road & Parking Area, Vadodara, Gujarat

2011

2011 2016

Post Monsoon Performance 2008 - 2016

29

Scarification Silane+ Acrylic copoymerSolution Spraying

Waterproofing Confirmed

Compaction

Silane + Acrylic copolymer

Spraying

Hammer Test

Sayajipura Plant Soil Road & Parking Area, Vadodara, Gujarat

Post Monsoon Performance 2008 - 2016

Stabilized and Waterproofed Reinforced Soil Base 20 cm thick

20152015

30School Approach Road, Paniya, Dist. Panch Mahals, Gujarat

Post Monsoon Performance 2015

31

Subgrade WaterproofingConfirmation

Compaction Carpet & Seal Coat

Spraying

Stone Base

Timachi Baria Falia, Jhalod, Dist. Dahod, Gujarat

Construction in Year 2012

Stabilized and Waterproofed Reinforced Soil Base 19 cm thick, 3.75 meter wide,

1400 and 700 meter length respectively

2015 2015

32Timachi Baria Falia, Jhalod, Dist. Dahod, Gujarat

Post Monsoon Performance 2014

34Namma Hola Namma Daari, Tal. Annigeri, Dist. Gadag, Karnataka

Compaction

Compaction Scarified Soil layer

Grit Spreading Spraying

Cement Spreading

Construction in Year 2015

35Namma Hola Namma Daari, Tal. Annigeri, Dist. Gadag, Karnataka

Mixing

Grit Spreading Spraying

Spraying Compaction

Compaction

Construction in Year 2015

Treated Control

36Namma Hola Namma Daari, Tal. Annigeri, Dist. Gadag, Karnataka)

Post Monsoon Performance 2015

37

International Projects

38Tamatave, Madagascar

Before the work commenced

39Tamatave, Madagascar (250 rainy days in a year)

Work in Progress

40

Waterproofing Confirmed Top Surface Bitumen Layer

Spraying and

Compaction

Grading Subgrade

Provincia Dal Azuary, Ecuador

Construction in Year 2015

The stretch is in perfect condition.

CBR of soil: 29.5 % and CBR of treated soil : 107%

Length: 4.5 km Width: 6-8m Thickness: 0.20m

Dosage: Terrasil 0.5 Kg / m3 and cement 1% by soil weight

41Provincia Dal Azuary, Ecuador

Post Rainy Season Performance In Year 2015

Bituminous Surface

Solution PreparationScarification

Spraying

Length: 42 Km,

Width: 6.2 m avg.,

Thickness: 30 cm avg.

Dosage:

Terrasil 0.75 kg/m3,

Bituminous treatment:

Slurry Seal

42Region San Martin, Peru

Construction In Year 2015

Bituminous Surface Compacted Surface

Length: 32 Km,

Width: 5.2 m average,

Thickness: 13 cm average

Terrasil 0.5 kg/m3

Cement 1% by soil weight,

Bituminous treatment:

slurry seal

43Region Piura, Peru

Construction In Year 2013

Length: 3500 m2,

Thickness: 12-13 cm

Terrasil 0.5 kg/m3 +

Polymer + Lime 2%

Top Spray:

Terrasil 0.01 kg/m2

44

Compacted Surface Lime Mixing

Mixing Spraying

Spain

Parking Fuerte de San Cristobal Badajoz, Spain

Length: 3500 m2,

Thickness: 10 cm

Terrasil 0.4 kg/m3

Top Spray: (Terrasil +

Polymer): 0.01 kg/m2

45

Spraying Mixing

Compaction Grading

Optimasoil, Madrid, Spain

Parking Carterpillar Malaga