rbi-81
TRANSCRIPT
“RBI Grade 81 – A Natural Soil Stabilizer” (A Cost Effective , Rapid, Environment Friendly Soil Stabilizer )
By
Alchemist Touchnology Limited, New DelhiJuly 2010
Road Building International (RBI) Grade 81
Natural Inorganic Stabilizer which Re-engineers & Modify the Properties of Soil to strengthen the same.
Developed by South African Army in the beginning of 90’s for Pavement Engineering Applications by RBI.
PropertiesPowder stabilizer Grey color Water solubility of 0.2/1000 Non-inflammable
Effectiveness of RBI Grade 81 with Different Types of Indian Soils
Untreated (UT)
Treated (T)
Type of Soil
CBR %UCS, kg/sqcm
( all results are with 4% Stabilizer) * 6%
CRRI IITKgp IITR IITM RAASTA CRRI IITKgp IITR IITM RAASTA
UT Clay 4 3 - 2 5 5 0 0 3T with
RBI Clay 25 78 - 22 42 15 19 14 14
UT Silt 8 - 13 - 10 4 - - 16T with
RBI Silt 198 - 114 - 32 32 - - 39
UT Sand 22 - - - 14 0.5 - - 5T with
RBI sand 53 - - - 143 7 - - 23
UT Gravel 30 - 90 - 34 3 5 -- 2.1T with
RBI Gravel 197 - 361 - 180 26 35 - 19*
Effectiveness of RBI Grade 81 with Different Types of Indian Soils
Untreated (UT)
Treated (T)
Type of Soil
PI (Plasticity Index) (%) FSI (Free Swell Index) (%)
Sample 1
Sample 2
Sample 3
Sample 4
Sample 5
Sample 1
Sample 2
Sample 3
Sample 4
Sample 5
UT Clay 18 11.5 29 24.2 46.4 16.6 20 33 61.5 53.8
T with RBI Clay 11.7 5.2 8.8 13.3 21.2 3.2 4.3 13 23.1 21.2
UT Silt 10.3 11.6 10.3 5.6 23 5 16.6 0 9.1 8.3
T with RBI Silt 5.4 6 2.3 1 10.6 0 0 0 0.8 2.1
Construction cost reduction by 10 – 30%
Construction time reduction by 30 – 40%
Drastically increases the strength
Treated soil is water resistant &
prevents damage to the road foundation
Reduces transport & earth-moving costs
by about 60%
Longer Durability
Reduces Maintenance Cost
Reduces leaching and contamination of
ground water
Reduces use of bitumen.
Reduces energy consumed in road
construction
Saves construction material like
Aggregates, Good soil
Saves non-renewables resources in
construction process
Reduces the Carbon Emission resulting
into carbon credits
Advantages of RBI Grade 81 Environmental Benefits of using RBI 81
Application Areas
Pavements Highways & Expressways Hill Roads; High Altitude
Roads Unpaved Roads Pothole Repair Cold Recycling Helipads; Airfields Hard Standing Ground Op Tracks Mule tracks
Bricks & Paver Blocks Low Cost Housing
Footpaths; Boundary
Walls
Construction Equipments
2. Dozer
1. JCB 4. Rotavator
5. Water Sprinkler
Pavement Design Catalogue
Sub-Grade CBR 2% (CBR 10% using RBI)
Trafficmsa
Thickness mm
Pavement Composition
Bituminous Surfacing Base Sub-Base
BC DBM
250 460 (200)
10 850 (540) 40 100 (50)
20 850 (565) 40 130 (75)
30 900 (580) 40 150 (90)
50 925 (600) 40 175 (110)
100 955 (630) 50 195 (130)
150 975 (650) 50 215 (150)
IRC Code References For Reducing Pavement Thickness
Rise in CBR from 2% to 10 %, There is saving of DBM by 42 % Saving in aggregates for sub base will be 57 % More than 50% saving in aggregate as per IRC:37- 2001
Conventional Technology RBI Grade 81 Technology
LayerLayer
Thickness(mm)
LayerLayer
Thickness(mm)
SDBC 25 SDBC 25
BM 75Aggregate+ 4% RBI Grade 81 150
WBM 75
WBM 75Soil + 4% RBI Grade 81 150
WBM 75
WBM 100 Soil + 2% RBI Grade 81 100
GSB 150
Saving in Pavement Thickness
GSB 150
Total Thickness 725 Total Thickness 425
Case Study : Reasi - Pauni Road, Katra, J & K
Savings : Case Study Reasi - Pauni RoadComparison Chart
Conventional Pavement RBI 81 Pavement
Taking Core of RBI Grade 81 Patch After 9 Months
Construction of Airfield Using RBI Grade 81
Altitude of about 13500 Ft. Temperature of -30o C to +30o C Design: One layer of 250 mm of Sub Grade stabilization
with 4% RBI Grade 81
Construction of Airfield Using RBI Grade 81
Landing and Takeoff at Nyoma Airfield Runway
Source: http://livefist.blogspot.com/2009/09/iaf-32-lands-at-nyoma-ladakh.html
Applications in Perma-Frost Condition
RBI 81 Treated SurfaceUntreated Surface
Application in Italy Quarry Road Truck Load 40 MT 3 Years without Maintenance
Low Cost Housing RBI 81’s innovative technology enables the use and recycling of local readily
available materials while creating string and easy to use earth blocks.Advantages Capacity Building and empowerment of local population (men and women) Creation of jobs in the field of block production and Construction Protection of the environment
Cold Recycling with RBI Grade 81
Quarry Road State : Karnataka Project Name : Quarry Road near Weigh Bridge Location : Kolar
Road Made Using Iron Ore Waste From Mines State : Karnataka Project Name : PWD Approach Road to BBH Mines Location : Chitradurg
Instead of soil from outside mines waste was used in construction
Highway Road in the Hills State : Jammu & Kashmir Project Name : Km 63.10, Jammu Poonch Highway Location : Tanda Bamla Section, Jammu
Desert Roads State : Rajasthan Project Name : Kota Sawai Madhopur Road, SH-33 Location : KM 17, Kota
Desert Roads (Contd) State : Rajasthan Project Name : Mawali Tali Bhuria Dhora Road
Nr. South Camp Location : Mahajan Ranges, Suratgarh
Village Roads (Contd) State : Orissa Project Name : PMGSY Rural Road Location : Village Dhamra
City Road State : Delhi Project Name : Connecting Road Near Air force
School & CSD Canteen, Officers Quarters Location : Delhi Cantt.
Off Site Mixing State : Karnataka Project Name : Campus Road Location : KGA, Bangalore
Some International Applications
Main road into city of Kigali - RwandaSecondary paved roads - KenyaHeavy traffic paved road – Israel
Access road to a construction site Israel
Access roads and drilling pad Angola
Township roads - South Africa
Forest Road Forestry roads – The benefits of using RBI 81 are particularly self-evident
when building roads in a fragile natural environment. RBI 81 do not place an additional burden upon their precious natural resources
Alchemist Touchnology Limited Global Business Park, Tower B, Unit 003
Gurgaon- 122002,Haryana (India)
Phone No.: +91-124- 4980000
Fax. No.: +91-124- 4980088
RBI 81 RoadAsphalt Road