roadstab - alternative to expensive road
TRANSCRIPT
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RoadstaBInnovative technologies from Russia
RoadstaB – Q : Soil Stabilizer
RoadstaB – K1 : Asphalt Rejuvenator
Presented by: Nikhil Sharma
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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
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Accreditation by IRC
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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
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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.
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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
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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
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LOAD TRANSFER SOLUTION
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Basics of flexible pavement 5 MSA
75 mm
250 mm
75mm
75mm
Crust Thickness: 475 mm
Design Satisfying requirement of code IRC 37-2012
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RoadstaB Semi-rigid pavement Solution 5 MSA
25 mm100 mm
200 mm
Crust Thickness: 325 mm
Design Satisfying requirement of code IRC 37-2012
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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,.
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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%
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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
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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)
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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.
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Patna – O mile.NH-30
Final Surface
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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.
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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.
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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
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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.
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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.
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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.
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We thank you for your valuable time and consideration.
RoadstaB TeamAdd: Bldg no 847, Sector 6
Bahadurgarh, Haryana124507, India
Ph: +91 9896883663E.mail: [email protected]
.