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

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

2 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

3 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.

4 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

5 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

6 Test Results - CRRI Research In India- CRRI Test Results CBR % Improvement in Soak CBR Lab (Pondicherry Soil) Untreated 2 4 Curing in Weeks 14 ITS in KPa Im provem ent in ITS (Pondicherry Soil) untreated Curing in w eeks No. of repetitive cycles Improvement in Fatigue Life Untreated Curing in w eeks

7 Test Results University of Bangalore CBR (%) Fig 16. Change of CBR over time for various samples Research In India- College of Engg Trivandrum Sample w eek 0 w eek 1 w eek 2 w eek 4 w eek 6 w eek 8 Time CL OH CH CI SX Sample 1 Sample 2 Sample 3 Sample 4 Sample 5

8 UCS Results NITK Surathkal Laterite Soil UCS (Kpa)_ Curing period in weeks Dosage 1 Dosage 2 Dosage 3 Dosage Black Cotton Soil UCS (Kpa Curing Period (Weeks) Dosage 1 Dosage 2 Dosage 3 Dosage 4

9 UCS and Quality relationship between UCS and the quality of the subgrade soils used in pavement applications (Das 1994) UCS (kpa) Quality of sub-grade Soft sub-grade Medium sub-grade Stiff sub-grade Very stiff sub-grade >380 Hard sub-grade

10 Dilution Ratio

11 Application Procedure Step 1 Scarifying and pulverizing the soil surface.

12 Application Procedure Step 2 Calculating the quantity of enzymes.

13 Application Procedure Step 3 Adding enzymes to the water tank.

14 Application Procedure Step 4 Spraying enzymes into the soil.

15 Application Procedure Step 5 Mixing soil, metal and enzymes

16 Application Procedure Step 6 Levels and Camber.

17 Application Procedure Step 7 Rolling the treated surface

18 Application Procedure Step 8 Finished road in use

19 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

20 Cost Comparison As per APSRRDA Kadappa Circle As per Convetional Method of SP-72 As Per SR rate ( DPR ) Amt in Sq.mt Gravel base 150mm WBM Grade 2 75mm WBM Grade 3 75mm Total Cost per m Cost Savings per M Cost Savings per KM 142, Savings in % % The cost savings range from 1.5 L per km 4 L per km depending on the design

21 Cost Comparison As per APSRRDA Kadappa Circle As per Convetional Method of SP-72 As Per SR rate ( DPR ) Amt in Sq.mt GSB 150mm WBM Grade 2 75mm WBM Grade 3 75mm Total Cost per m Cost Savings per M Cost Savings per KM 410, Savings in % % The cost savings range from 1.5 L per km 4 L per km depending on the design

22 Cross Section

23 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

24 Roads Constructed using TerraZyme - India Rural Road Panvel, After one Monsoon without Asphalting

25 Roads Constructed using TerraZyme - India Rural Road After Paving The road has undergone 4 monsoons

26 Roads Constructed using TerraZyme - India Rural Road D.R.D.A, Sundergarh

27 Roads Constructed using TerraZyme - India Rural Road D.R.D.A, Sundergarh, After One Monsoon

28 Roads Constructed using TerraZyme - India Performance of Road during rains NH-66

29 Roads Constructed using TerraZyme - India NH 4A Goa N.H.

30 Roads Constructed using TerraZyme - India Industrial Roads Schwing Stetter Treated Surface With Concrete Top

31 Roads Constructed using TerraZyme - India Industrial Roads Asahi Ltd

32 Roads Constructed using TerraZyme - India Residential Roads Mantri Group

33 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

34 World Bank Study The 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 )

35 Roads Constructed using TerraZyme - World World Bank Project State Highway - USA

36 Roads Constructed using TerraZyme - World China Indonesia

37 Roads Constructed using TerraZyme - World Pennslyvania - USA Japan

38 Roads Constructed using TerraZyme - World Azerbaijan Brazil

39 National Highway 66, Tamil Nadu A Case Study Close up view of the Road. The Road presently caters to 1,300 commercial vehicles / day.

40 Comparison between Conventional and TerraZyme treated road. TerraZyme treated road without Asphalt. Conventional road with Asphalt.

41 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

42 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 and stiffness achieved by using TerraZyme. Structures are built in much quicker time using TerraZyme.