Cipr With Foamed Bitumen
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COLD INPLACE RECYCLING USING FOAMED BITUMEN-
STEP TOWARDS SUSTAINABLE ROAD CONSTRUCTION
Technical Seminar, HQ CE (P) Dantak, Thimphu (Bhutan)
21st Apr2014
K K RAZDAN Chief Engineer, Project Shivalik
RAJEEV CHANDRA EE (Civil ), Project Shivalik
B K DAS JE (Civil ), Project Shivalik
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2 Cold In Place Recycling using Foamed Bitumen Step towards Sustainable Road Construction
OUTLINE
Pavement Recycling
Foamed Bitumen
Foamed Bituminous Mix
Foamed Bitumen Mix Design
Field Techniques
Conclusion
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3 Cold In Place Recycling using Foamed Bitumen Step towards Sustainable Road Construction
PAVEMENT RECYCLING
What is Pavement recycling ?
Process of removing distressed bituminous
course for reuse in resurfacing or
reconstructing a pavement.
Hot In Place Recycling
Cold In Place Recycling
Pavement Recycling
In - place
recycling
In - plant recycling
Hot process
Cold process
Recycling is One of the Various rehabilitation
Alternatives but it is the only sustainable technique
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4 Cold In Place Recycling using Foamed Bitumen Step towards Sustainable Road Construction
PAVEMENT RECYCLING
Why to Rehabilitate pavement by recycling ?
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5 Cold In Place Recycling using Foamed Bitumen Step towards Sustainable Road Construction
PAVEMENT RECYCLING
Cold in Place Recycling
Existing Asphalt Pavement Milled
(75 to 200 mm Depth)
Addition of virgin aggregate if any
Spreading of active filler
Addition of recycling agent with
recycler
Compaction
Foamed bituminous stabilisation in Hilly terrain
Cold in Place recycling Train
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6 Cold In Place Recycling using Foamed Bitumen Step towards Sustainable Road Construction
PAVEMENT RECYCLING
Benefits
Significant Structural Improvements
Most Pavement Distress Treated
Ride Quality Improved
Minimal Air Quality Problems
Contd.
Application of Foamed Bitumen and recycling
Cold Milling of distressed bituminous course
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7 Cold In Place Recycling using Foamed Bitumen Step towards Sustainable Road Construction
PAVEMENT RECYCLING
Benefits
Conservation of aggregates and
bitumen
Conservation of energy and
environment
Temperature independent process
Preservation of pavement geometrics
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8 Cold In Place Recycling using Foamed Bitumen Step towards Sustainable Road Construction
OUTLINE
Pavement Recycling
Foamed Bitumen
Foamed Bituminous Mix
Mix Design Foamed Bitumen Mix
Field Techniques
Conclusion
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9 Cold In Place Recycling using Foamed Bitumen Step towards Sustainable Road Construction
FOAMED BITUMEN
What is Foamed Bitumen ?
Foamed bitumen is produced when a small quantity of cold water is
injected into the hot bitumen
The bitumen forms and expands
Greater surface area of bitumen results in better coating of aggregate
with very small quantity of Bitumen
Schematic of Foaming process, (Wirtgen 2012)
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10 Cold In Place Recycling using Foamed Bitumen Step towards Sustainable Road Construction
FOAMED BITUMEN
Source: Wirtgen (2012)
Characterization of Foamed Bitumen
Expansion Ratio (ER) & Half life (HLT)
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11 Cold In Place Recycling using Foamed Bitumen Step towards Sustainable Road Construction
OUTLINE
Pavement Recycling
Foamed Bitumen
Foamed Bituminous Mix
Mix Design Foamed Bitumen Mix
Field Techniques
Conclusion
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12 Cold In Place Recycling using Foamed Bitumen Step towards Sustainable Road Construction
FOAMED BITUMINOUS MIX
Using foamed bitumen as a binding agent in cold mix
I. Reclaimed Asphalt Pavement(RAP)material
II. Virgin aggregates (optional)
III. Water
IV. Active filler ( Cement or Lime)
V. Foamed Bitumen
Source: Wirtgen Manual, 2012
12
Foamed Bituminous Mix
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13 Cold In Place Recycling using Foamed Bitumen Step towards Sustainable Road Construction
FOAMED BITUMINOUS MIX
40 mm-200 mm
150 mm-300 mm
New HMA
Distressed HMA
Untreated
Aggregate
Base
Subgrade
Original Pavement CIPR
Foamed
Bitumen
Stabilised
(FBS)Layer
150 mm-450 mm
40 mm-200 mm
40 mm -150 mm
150 mm-450 mm
Source: Wirtgen Manual, 2012
Use of foamed bituminous mix in pavement strengthening / rehabilitation
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14 Cold In Place Recycling using Foamed Bitumen Step towards Sustainable Road Construction
FOAMED BITUMINOUS MIX
Application of Foamed bituminous mix
Rehabilitation of damaged bituminous pavements by Cold in-place
and in-plant Recycling technology
Foamed Bituminous Stabilised layer as Binder or Base course with
wearing course on top.
Damaged Bituminous Layer
NH-5 Chennai-Tada Road Pulverisation of HMA Layer by Recycler
Compacted foamed bituminous
stabilised layer
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15 Cold In Place Recycling using Foamed Bitumen Step towards Sustainable Road Construction
OUTLINE
Pavement Recycling
Foamed Bitumen
Foamed Bituminous Mix
Mix Design of Foamed Bitumen Mix
Field Techniques
Conclusion
Marshall Test of Foamed bituminous mix with RAP
Foaming Equipment
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16 Cold In Place Recycling using Foamed Bitumen Step towards Sustainable Road Construction
MIX DESIGN OF FOAMED BITUMINOUS MIX
Foamed bituminous mix design flow chart
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17 Cold In Place Recycling using Foamed Bitumen Step towards Sustainable Road Construction
OUTLINE
Pavement Recycling
Foamed Bitumen
Foamed Bituminous Mix
Mix Design Foamed Bitumen Mix
Field Techniques
Conclusion
Animated diagram of in place process
Animated diagram of cold milling
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18 Cold In Place Recycling using Foamed Bitumen Step towards Sustainable Road Construction
FIELD TECHNIQUE
Phased Method For Foamed Bitumious Mix Stabilization:
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19 Cold In Place Recycling using Foamed Bitumen Step towards Sustainable Road Construction
FIELD TECHNIQUE
Schematic diagram for Process of Foamed Bituminous Mix Stabilisation
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20 Cold In Place Recycling using Foamed Bitumen Step towards Sustainable Road Construction
FIELD TECHNIQUE
Integrated Method
Recycling Train - (Water Tanker + Bitumen Tanker + Integrated Recycler
Milling, pulverising, rejuvenating RAP with foamed bitumen, spraying cement / lime ,
mixing and placing are performed in a single operation by the Integrated recycler
Latest recycling train with integrated recycler cum slurry injector Recycling Train with Bitumen & Water Tanker
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21 Cold In Place Recycling using Foamed Bitumen Step towards Sustainable Road Construction
OUTLINE
Pavement Recycling
Foamed Bitumen
Foamed Bituminous Mix
Mix Design of Foamed Bitumen Mix
Field Techniques
Conclusion
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22 Cold In Place Recycling using Foamed Bitumen Step towards Sustainable Road Construction
Conclusion
Hot mix asphalt (HMA) is 100% recyclable
Existing bituminous layer should be recycled and
stabilized in place or in plant to form the base or
binder course
Cold in place recycling with foamed bitumen is a
effective, sustainable and green technique for
rehabilitation of distressed pavement
Use of milling and recycling of bituminous layers
should be made mandatory
Framing of guidelines and specifications for cold
in place recycling technology for the Indian
subcontinent
Cold in place recycling in High altitude area
Cores of foamed bituminous mix stabilised layers
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THANK YOU
Let us Step towards Green and Sustainable infrastructure for our next generation