Low Cost Eco Friendly Alternate to conventional GSB , WBM/WMM · conventional GSB , WBM/WMM. ... Method of Road Construction ... • relationship between UCS and the quality of the

Low Cost Eco Friendly Alternate to conventional GSB , WBM/WMM

Problems faced in Conventional Method of Road Construction

• Need for huge quantities of Crushed aggregates

• Strict Mining Policies / Environment Norms

• Cost of Material shooting up, increasing construction costs

• Non Availability of material leading to delay

TerraZyme – A bio enzymatic soil stabiliser

• To minimize the problems faced, we introduce TerraZyme an

alternate tool for building roads

• TerraZyme, manufactured by Nature Plus Inc – U.S, (under

ISO – 9002 procedures ) is an excellent replacement for

metalling and solling.

• TerraZyme is a liquid extract from sugar molasses that

improves the engineering qualities of the soil like CBR values

and density and decreases the OMC, plasticity index of soil.

Benefits of using TerraZyme• Cuts construction cost by 10%-20%

• Higher CBR value / higher road strength: TerraZyme base

structures have a much higher CBR value.

• Lowers the maintenance cost by 30-50%.

• Saves construction time by 50%

• Pavement thickness is reduced by 5-10% in phase of trials

• Environment friendly and bio-degradable product.

• The product has been accredited by IRC

How does TerraZyme Work• Clay Water Effect – TerraZyme reduces size of double layer of clay,

thereby reducing swell in clayey in soils

• Cation Exchange – Thickness of double layer is reduced permanently, which reduces the water adsorbed by clay, which in turn reduces plasticity in clay and increases molecular structure of clay.

• TerraZyme stabilization effects – Organic cations have large flat structures approaching size of clay particles , which then neutralizes the negative charge of clay by covering it

• Other TerraZyme effects – It facilitates the removal of pore water leading to higher densities and reduced void percentages, leading to realignment of particles, thereby reducing permeability of soil

Research In India- CRRI Test Results

Improvement in Soak CBR Lab (Pondicherry Soil)

14

10.3

4.19

02468

10121416

Untreated 2 4Curing in Weeks

CBR

%

Improvement in ITS (Pondicherry Soil)

146

137

11486

020406080

100120140160

untreated 2 3 4Curing in w eeks

ITS

in K

Pa

Improvement in Fatigue Life

35065

32325

17851

80760

500010000150002000025000300003500040000

Untreated 2 4 7Curing in weeks

No.

of r

epet

itive

cy

cles

Test Results - CRRI

Research In India- College of Engg TrivandrumFig 16. Change of CBR over time for various samples

05

1015

202530

3540

4550

Sample w eek 0 w eek 1 w eek 2 w eek 4 w eek 6 w eek 8Time

CBR

(%)

Sample 1Sample 2Sample 3Sample 4Sample 5

Test Results – University of Bangalore

CLOHCHCISX

UCS Results – NITK Surathkal

0200400600800

10001200

0 2 4 6 8

UC

S (K

pa)_

Curing period in weeks

Laterite Soil

Dosage 1Dosage 2Dosage 3Dosage 4

0

200

400

600

800

0 2 4 6 8

UC

S (K

pa

Curing Period (Weeks)

Black Cotton Soil

Dosage 1Dosage 2Dosage 3Dosage 4

UCS and Quality

• relationship between UCS and the quality of the sub-grade soils used in pavement applications(Das 1994)

UCS (kPa) Quality of sub-grade

25–50 Soft sub-grade

50–100 Medium sub-grade

100–200 Stiff sub-grade

200–380 Very stiff sub-grade

>380 Hard sub-grade

Dilution Ratio

Scarifying and pulverizing the soil surface.

Application Procedure – Step 1

Calculating the quantity of enzymes.


Adding enzymes to the water tank.


Spraying enzymes into the soil.


Mixing soil, metal and enzymes


Levels and Camber.


Rolling the treated surface


Finished road in use


Design Guidelines

• Based on AASHTO Structural Number for design of flexible pavements

• In this phase of trials, the reduction of crust thickness is limited to max of 2” as compared to SP 72 design template

Cost Comparison As per APSRRDA – Kadappa Circle

The cost savings range from 1.5 L per km 4 L per km depending on the design

As per Convetional Method of SP-72 As Per SR rate ( DPR ) Amt in Sq.mtGravel base 150mm 659.92 98.99WBM Grade 2 75mm 1821.21 136.59WBM Grade 3 75mmTotal Cost per m2 235.58

Cost Savings per M2 35.57Cost Savings per KM 142,261.13 Savings in % % 15.10

Cost Comparison As per APSRRDA – Kadappa Circle

The cost savings range from 1.5 L per km 4 L per km depending on the design

As per Convetional Method of SP-72 As Per SR rate ( DPR ) Amt in Sq.mtGSB 150mm 1106.75 166.01WBM Grade 2 75mm 1821.21 136.59WBM Grade 3 75mmTotal Cost per m2 302.60

Cost Savings per M2 102.59Cost Savings per KM 410,359.13 Savings in % % 33.90

Cross Section

Indian Work and Tests

• PWD Maharashtra• DRDA Sundergarh• PMGSY Karnataka• NH 66 – Chennai Circle• NH 4A – Goa• Wipro• Orchid Health Care• Sobha Developers• Mantri Group• Semac Consultants

• NITK Suratkal• Bangalore University• CRRI• Anna University• Shanmuga College of

Engineering

Roads Constructed using TerraZyme - India

Rural Road – Panvel, After one Monsoon without Asphalting


Rural Road – After PavingThe road has undergone 4 monsoons


Rural Road – D.R.D.A, Sundergarh


Rural Road – D.R.D.A, Sundergarh, After One Monsoon


Performance of Road during rains – NH-66


NH 4A – Goa N.H.


Industrial Roads – Schwing Stetter

Treated Surface With Concrete Top


Industrial Roads – Asahi Ltd


Residential Roads – Mantri Group

International Accreditations

• Pennsylvania Highway Department

• Canada PWD• Brazil Highway• PORIM• Thailand• Congo• Mexico• Japan

• World Bank (BIRF 3685 – PA)

• USAID• Brigham Young

University• Columbia University

World Bank StudyThe world bank study with multiple stabilizers across the world were tested in Paraguay, in which TerraZyme stood

first, based on which over 1400km were specified in Paraguay

Report MOPC / World Bank (BIRF 3685 – PA), March 2002

Paul Guitink, ( World Bank )

Ruben Brazetti ( National Department of Roads & Highways, Parana, Brazil )

Roads Constructed using TerraZyme -World

World Bank Project State Highway - USA


China Indonesia


Pennslyvania - USA Japan


Azerbaijan Brazil

Close up view of the Road. The Road presently caters to 1,300 commercial vehicles / day.

National Highway – 66 , Tamil NaduA Case Study

Comparison between Conventional and TerraZyme treated road.

TerraZyme treated road without Asphalt.

Conventional road with Asphalt.

Economic Benefits of using TerraZyme

• The road construction was cheaper by 30%

• The road was used for one year with heavy traffic without any black topping.

• The use of TerraZyme gives the opportunity to the government agencies to plan diversion roads without any black topping

Conclusions

• Roads, constructed using TerraZyme are Cheaper

• The life cycle of structures built using TerraZyme is increased

• Maintenance cost are reduced due to higher strength andstiffness achieved by using TerraZyme.

• Structures are built in much quicker time using TerraZyme.

Documents

Low Cost Eco Friendly Alternate to conventional GSB , WBM/WMM · conventional GSB , WBM/WMM. ... Method of Road Construction ... • relationship between UCS and the quality of the