RoadstaBInnovative technologies from Russia

RoadstaB – Q : Soil Stabilizer

RoadstaB – K1 : Asphalt Rejuvenator

Presented by: Nikhil Sharma

Our Technologies1. Soil Stabilization:

A. Economy: RoadstaB Technology reduces cost by 20% to 40%

B. Time Saving: Construction time is reduced by 50%

C. Life Longevity: RoadstaB Tech enhances the durability by 4 times.

2. Asphalt regeneration: A. 100% rejuvenate asphalt granules, could be used

without mixing virgin asphalt.

B. RoadstaB rejuvenated asphalt properties, exceeds the mechanical properties of virgin asphalt by 50%

C. Supports 2 types of processing – Cold and Hot

Accreditation by IRC

RoadstaB Soil Stabilization economy data

Soil stabilization is an innovative technology, which removes granular layers, and decreases the crust thickness. Results in saving:• Aggregates - 80%• Asphalt layer - 65%• Construction time - 50%. • Enhances durability – 4 times with proper

maintenance. • Decreases structural cost - 20-40% depending on

the raw material to be used in structural designing

Application areas

• Base structure for highways and state roads.

• Base structure or structure for service lanes and rural roads.

• Airstrip and helipads.

• Base for civil structures.

• Dirt Roads without wearing course.

• Temporary roads without wearing course.

Road Construction hurdles

• Mining problem

• Heavy traffic

• Heavy rain

• Flood, higher HFL

• Freq. Maintenance

• Quality control

• Machineries

• No aggregate required

• Meant to bear heavy load

• Water resistant

• Stand alone on weaker soil

• No maintenance req.

• Full engineering supplied

• Basic machine req.

Problems RoadstaB’s Solutions

Properties of Road materials as per IRC 37-2012

• E value of BC= 1700-3000 MPa

• E value of DBM = 1700-3000 MPa

• E value of WMM = 350-450 MPa

• E value of GSB = 160 MPa

• E value of Subgrade = 60-70 Mpa

• E value of RoadstaB layer = 8200 Mpa

LOAD TRANSFER SOLUTION

Basics of flexible pavement 5 MSA

75 mm

250 mm

75mm

75mm

Crust Thickness: 475 mm

Design Satisfying requirement of code IRC 37-2012

RoadstaB Semi-rigid pavement Solution 5 MSA

25 mm100 mm

200 mm

Crust Thickness: 325 mm

Design Satisfying requirement of code IRC 37-2012

IIT Pave Software strain calculation for RoadstaB semi-rigid pavement 5 MSA

Allowable strain as calculated from equations in IRC:37,2012

Actual strain obtained from IITPAVE

Horizontal tensile strain

425.6 x 10-6

Horizontal tensile strain

24.43 x 10-6

Vertical compressive strain on subgrade 784.4x10-6

Vertical compressive strain on subgrade 464.1 x 10-6

The comparison of actual strains comes at the critical locations

in compare with the allowable strains are given below.

It shows that the pavement design is safe. Strength Value

taken in design is 1650 MPa, which is 20% of the real value

8200 MPa,.

Durability test from NIT – Suratas required by IRC

• The maximum permissible percentage loss in weight recommended for the

stabilized mix to be used in pavement base course is 20% as per IRC:SP: 89-

2010. The stabilised mix in the present study satisfies this criterion.

Durability Test results for Weight Loss (%) in each cycle Sample 1 2 3 4 5 6 7 8 9 10 11 12 Total Avg.

1 0.71 0.31 0.51 0.54 0.54 0.57 0.51 0.72 0.59 0.53 0.57 0.46 6.55 6.46 2 0.92 0.28 0.38 0.34 0.53 0.66 0.51 0.65 0.36 0.52 0.56 0.53 6.24

3 0.84 0.43 0.41 0.48 0.51 0.60 0.62 0.60 0.65 0.44 0.60 0.43 6.60

Permissible Loss: 20% Real Loss 6.46%

Modulus of Elasticity by NIT, Gorakhpur as required by IRC

Material %

Sand Dust 60

Silty Sand 35

RoadstaB 0.007

Cement 4

CBR Unconfined Compression UCS Kg/cm2

172.50 30.2

Technical Data

No Contents in %

UCS after water saturation of 7 days kg/cm2

R-7 R-15

1 Soil Mix – 100%, cement 5% 23.2 13.6

2 Soil Mix-100%, cement 5 %, RoadstaB with OMC 38.7 31.5

OAO “Russian Highway scientific research institute”“Souzdornii”

(Association of national highway scientific research Institute)

Notes:

1. R7- Strength limit on compression after total saturation

2. R15- Strength limit on compression after 15 freezing and unfreezing cycles.

3. Calculation of used stabilizer and cement were taken above 100% of mass of

soil mix.Conclusion: As per the results after testing of stabilized soils treated by

cement and RoadstaB, qualifies the requirement of Govt standard

235558-94 and freezing resistance F 15 ( 15 cycles of negative temperature to

positive temperature and vise-versa)

Central Testing laboratory ZAO “PO Vozrazdenie” Russia

Contents: Sand – aggregate 95% Cement mark 400 – 5% Stabilizer and organ mineral mix RoadstaB (water soluble activated organ-

mineral admixture) 0.0071%

Physical – Mechanical properties Compressive strength, MPa R20

UCS Tensile bending strength

Curing 7 Days 4.9 -

Curing 28 Days 6.5 2.1As per Govt standard 23558-94 for mark M-60 6.0 1.5

Report: Above specified Aggregate-Sand-Cement mix qualifies the

government standard Govt Standard 23558-94 mark 60.

Patna – O mile.NH-30

Final Surface

Processing: Stabilized Mix

For Soil stabilization proper homogeneous mixing is must. Ideal compaction is necessary. 3 types of processing can be used. Every process has its advantages and restrictions, to be assessed by the client and Job site.1. Mixed in plant (concrete mixer or WMM plant)

paved by paver, and compacted by soil compactor2. Mixed in specialized stabilization plant, paved by

paver, and compacted by soil compactor3. In situ mixing by recycler, leveled by grader, and

compacted.

In-Plant mixing: WMM or Batch Mix Concrete mixer.

Advantages: 1. No spl. Machine required2. Available in all the construction sites. 3. Can be paved by paver.Restrictions: 1. Slow production2. Transportation of ready material. 3. Needs calibration4. Can not crush soil lumps, and rocks if available.5. Low moisturized granular or powdered material

required .6. Difficult to use in Monsoon.

Specialized Batch Mix stabilization plant.

Advantages: 1. Fast processing, optimized and accurate.2. Can brake soil lumps.3. Can be paved by paver. 4. Accurate and homogeneous mixing.Restrictions: 1. Transportation of ready mix.2. Can not crush stone or rocks, if available in

material. 3. Machine cost

In Situ mixing by recycler. Machine available on rent.

Advantages:

1. No transportation of material required.

2. Can crush stone or rocks, work with any material

3. Accurate, and homogeneous mixing.

4. Faster in application.

Restrictions:

1. To be leveled by grader.

2. Machine cost.

Application in field by in plant mixing

1. Removal of biological layer, removal of organics.

2. Compaction of base.

3. Preparation of subgrade.

4. Supply of ready mix from plant.

5. Paving process by paver.

6. Compaction to achieve required density.

7. Structure is ready for further laying of other layers as per design.

Application in field by Recycler mixing.

1. Removal of biological layer.2. Compaction of base. 3. Preparation of Subgrade4. Supply of designed material from borrow area.5. Leveled by grader – road bed construction. 6. Mixing by recycler up to required depth on OMC.7. Cambering by grader. 8. Compaction to the required density. 9. Structure is ready for further laying of other layers

as per design.

We thank you for your valuable time and consideration.

RoadstaB TeamAdd: Bldg no 847, Sector 6

Bahadurgarh, Haryana124507, India

Ph: +91 9896883663E.mail: nikhil@roadstab.com

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