Stabilisattion for laong lasting pavement

7/26/2019 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

Documents

Stabilisattion for laong lasting pavement