Download - Stabilisattion for laong lasting pavement
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StabilizationForLon
LastingPavements
MithraDewars
c em s
ouc no ogy
m eNewDelhi
.
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Re uirementsof
Lon
Lastin
Stabilized
Re uirements
of
Lon
Lastin
Stabilized
PavementPavement
Stable Sub Grade Less Chan es in Volume
Stability with Variation in water content Good Drainage Provisions
Better riding quality
Durable pavement layers for less maintenance
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Pavement.Pavement.
Faster & Green Construction
Sustainable Strength
Cost Effective
Less Life Cycle Cost
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.
.
o emen a za on
Soil LimeStabilization
Lime
Fly
ash
Stabilization
SoilStabilizationwithCommerciallyavailable
o
a zers
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.
.
DiverseSoilTypes
LongLeadsofMaterial
ShortageofAggregate
HighMaintenanceCost
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theChallenges.theChallenges.
Suitable
with
any
type
of
in
situ
soil
ofsoil
viz.
CBR,
UCS,
PI
&
FSI
Mustgiverequiredimpermeabilitytosoil
Mustshow
ALL
WEATHER
DURABILITY
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Materialsto
Overcome
the
Challenges.Materials
to
Overcome
the
Challenges.
Soil Type Fine Coarse Fine Coarse Fine Coarse
Clay Clay Silt Silt Sand Sand
Volume Stabil ity Very
Poor Fair Fair Good Very Good Very Good
Stabilizers Lime
RBI Grade-81
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RBIGrade
81.RBI
Grade
81.
RBIGrade
81
has
been
Invented
to
provide
comprehensive and irreversiblesoil
s a za on spec ca y orroa
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van ageso
s ng
ra e
.van ages
o
s ng
ra e
.
Reduces Construction time
Increases strength
Treated soil is water resistant & prevents
damage to the road foundation and
durability leading to reduced pavement
maintenance cost
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.
.
Reduces trans ort & earth-movin costs
Reduces Maintenance Cost
Reduces the Carbon Emission resulting
in carbon credits
x u
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PWD Approach Road to BBH Mines, Chitradurga
Classification of Road: State Highway (SH48)
Width: 8m Design Traffic
500 CVPD with 20 T axle load
500 CVPD with 12 T axle load
19thJanuary2009
to
28th January
2009
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AfterTreatmentAfterTreatment
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Soil
Properties
without
&
with
RBI
Soil
Properties
without
&
with
RBI
Grade81Grade81
156
55 MDD(g/cc)
9
12 PI
CBR(%)
2.1 2.46 2.5 2.563.8 3
Soil Soil+2%RBI81 Soil+3%RBI81 Soil+4%RBI81
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Design:
Conventional RBI Grade81
, ,
75mm,WBMGIII150
mm,
Soil
+3%
RBI
Grade
81
150mm,WBMGIIExistingpavementconsideredas
GSBTop150
mm,
GSB
300mm,SubGrade
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..
..
Visual Observation by CRRI
70
70 59.5
50
60
36.5
20
30
0
10
Points
Section
Section
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1.54
1.4
1.6
0.8
1
1.2
0.63
0.2
0.4
0.6
0
ConventionalSection RBIGrade81Section
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Field CBR DCP b CRRI
Field CBR DCP b CRRI
120
80
40
60
12
0
20
ConventionalSection RBIGrade81Section
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Rou hness Di stick b CRRI
Rou hness Di stick b CRRI
2864
2500
3000
1713
1500
2000
500
1000
0
Conventional RBIGrade81
Section Section
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PavementModulus(FWD)byIRSM
Load A lied: 560 kPa normalized from 600 kPa
PavementModulus(FWD)byIRSM
Load A lied: 560 kPa normalized from 600 kPa
688
600
700
400
500
291 267
200
300 177
100
ModulusofBaseLayer MeanModulusofPavementConventionalSection RBIGrade81Section
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Conclusions
of
Case
Stud .Conclusions
of
Case
Stud .RBI Grade81 enhances the properties of the soil
RBI Grade
81 Section indicate excellent functional and
in wearing surface
Bonding between stabilized soil layer & bituminous
ayer oun a equate ntact
RBI Grade81 ma be used to save natural resources
like aggregates
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u e o a ou .
o o
Design: Sub Grade Stabilization up to a depth
of 250 mm with 4% RBI Grade 81
Stabilization of 2750 m length & 45 m wide
Sub Grade was completed in 67 Days
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Before
Treatment
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AfterTreatment
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Test
Results
B
Geo au e
on
Sub
Grade
of
Airfield
Properties Required October2009 April2010 Increment
(%)
Stiffness(kG)
MN/m 10.67 21.47 23.94 11.50
EValue
MPa 92.52 186.24 207.64 11.49
CBR(%) 28 142 174.57 22.94
UCS
kg/sq
cm
5.50 22.60 23.94 5.93
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Runway
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Scarif in
of
Stabilized
Sub rade
of
Airstri
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Cores
Extracted
From
Field.
RBI81Stabilized
RBI81
Stabilized
Soil Sub Base
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Cores
Extracted
From
Field.
250
mm,
RBI
81
Stabilized Subgrade
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an
ou
RBIGrade81
Pavement
Material
&
a ura
o
a zer