Transcript POLIMER ROAD TECHNOLOGY

POLYMER ROAD TECHNOLOGY
Present by
Geoplus and TerraBest corporation
1 STABILIZATION
1.1 What is stabilization?
A process in which small quantities of additive(s) is used and added to the existing
materials which can significantly improve the normal engineering properties of soils,
crushed rocks and gravels e.g. CBR, permeability and strength ec.
.
1.2 How to carry out stabilization?
* Usually carry out in-situ
* Sometimes in a centralized processing plant
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Soil
Soil + Cement
Soil+Cement+Polimer
1 STABILIZATION (Cont.#1)
1.3 Advantages
* Minimal use of chemical
* Efficient & rapid construction
* Reduced energy consumption
* Environmentally sound
* Existing materials can be used
* Reduces susceptibility to water
* Well proven process
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2 POLYMER
2.1 What is Polymer ?
* A water soluble white milky viscous liquid which is neutral and non-toxic
* Chemically, a polymer-based mixture composes of latex and cellulose dispersed in water
* A German Chemical Group formulation in origin
* A world-wide patented product
Other physical properties are :
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Boiling Point
100 C
Specific Gravity @25C
1.00 – 1.02
Viscosity @25C
1,200 – 2,000 cps
Solubility in water
Miscible in water
pH value @25C
11.0 – 12.5
2 POLYMER (Cont.#1)
2.2 What polymer is used
* A polymer mixture for use in soil-stabilization
* An additive to improve the performance of soil-stabilization through modification of their properties
* Enhance modulus of elasticity, flexibility, strength characteristics and durability
* Experience and track records confirmed it to be a beneficial modifier of soil-stabilization
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2 POLYMER (Cont.#2)
2.3 Modification of soil- stabilization by Polymer
* Cyclic load(repetitive & reversal) from traffic caused fatigue failures in pavement
* Above factors render original soil-stabilization less suitable today
* Conventional soil-stabilization susceptible to sulphate attack and proved inappropriate for clayey soils
containing excessive fines(> 35% passing the No. 200 sieve) and of high plasticity (P.I. > 10)
* All these suggest modification(s) to original soil-stabilization is necessary in order to meet critical
needs of pavements today
* Tests by renown laboratory, full-scale test pavements and in-service pavements have confirmed the
suitability of RENOLIT as a modifier
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2 POLYMER (Cont.#3)
2.4 How Polymer modify Soil-Stabilization?
* Increase modulus of elasticity through connecting cement-coated soil particles by numerous ‘microrubberbands’
* The water-holding nature is useful during curing process
* Protect soil-stabilization against harmful effects of chemical compounds in soil, e.g. sulphate
* Prevent penetration and capillary rise of water within soil-stabilization
* Reduce the effects of moisture migration – a major cause of pavement deterioration
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2 POLYMER (Cont.#4)
Soil particles
Cement
Polymer “micro rubberbands”
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Soil particles
Harmful soil chemicals
Polymer Coating
2 POLYMER (Cont.#5)
Shortage of water in conventional soil stabilization during curing
Cracks !
Soil Cement
Base course
RC-Soils overcome water shortage problem during curing
Polymer water
storage
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No
Cracks !
2 POLYMER (Cont.#6)
Free capillary rise of water
Blocked capillary rise of water
PC-SoilsSurface
Soil-Cement Surface
Micro pores
Capillary action (bleed) in
Normal Soil Cement
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Reduced bleeding in
PC-SOILS
2 POLYMER (Cont.#7)
2.5 What is polimer modified soil-cement ?
Adding 5% POLIMER (by weight of cement) will produce a mixture on site which upon compaction and curing will harden
to give an impermeable durable structural slab with high elastic modulus & flexibility and at the same time possesses
improved compressive and tensile strength characteristics to resist today’s critical load conditions experience by
pavements. Acronym “PC-SOILS”
In-situ Soil
PC-Soils
Polymer (5-10%
by wt. Of cement)
= PC-Soils
Assume use
Calculate
Quantity
1 cu.m.(dense)
= 1 x 2,000
= 2,000 kg
Cement required
5%
= 2,000 x 5/100
= 100 kg
Polimer
5%
= 100 x 5/100
= 5 Litres
Dry Soil
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Cement (3-7% by
wt. Of dry soil)
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STEPS FOR CONSTRUCTION OF
POLIMER ROAD PAVEMENT
START
SITE INVESTIGATION&
SOIL SAMPLINGS
LABORATORY SOIL TESTING *
RESULTS
NO PEAT
DESIGN **
CONSTRUCTION
FINISH
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PEAT
END
* Soil Test Required :
1.Natural Moisture Content
2.Grain Size Distribution
3.Atterberg Limits
4.Sulphate Content
5.Organic Content
6.Compaction Test
(Modified Proctor Method)
7.Durability Test
8.Compression Strength Test
** Design Method Used :
Equivalent Thickness
Method
(TA) - Pavement Design
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ROAD CONSTRUCTION PROCEDURE
BY SOIL STABILIZER
Step 1 : Spot marked for cement placement
according to the designed ratio
Step 3 : Roughly mixing cement and existing
soil by graders
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Step 2 : Spreading the required amount of
Portland cement
Step 4 : Homogenously mixing soil and cement
by soil stabilizer
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ROAD CONSTRUCTION PROCEDURE
BY SOIL STABILIZER (Cont.#1)
Step 5 : Spraying the mixture of Renolith and
water on the construction
Step 7 : Compaction each layer to the required
density
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Step 6 : Mixing soil-cement and the mixture of
Renolith and water by grader
Step 8 : Compaction with Pneumatic tyre rollers
and smoothing with Tandem rollers
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ROAD CONSTRUCTION PROCEDURE
BY RECYCLING MACHINE
Step 1 : Mark the stabilized area
Step 3 : Run the soil stabilizer machine over the
existing base material
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Step 2 : Load Renolith mixture and Portland cement as
designed ratio into the soil stabilizer machine
Step 4 : Mix the existing material with cement and
Renolith mixture to the designed thickness
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ROAD CONSTRUCTION PROCEDURE
BY RECYCLING MACHINE (Cont.#1)
Step 5 : Compact the stabilized area by the
roller compactors to the required CBR
Step 6 : Cure the Renolith base with
water for 3-7 days
Step 7 : The Renolith surface after
completed
Step 8 : Density test by sand replacement
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ROAD CONSTRUCTION PROCEDURE
BY GRADER MACHINE
Step 1 : Grading the constructing area
Step 2 : Putting the suitable volume of cement
Step 3 : Spread the Portland cement all over the
surface
Step 4 : Mixing soil and cement properly
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ROAD CONSTRUCTION PROCEDURE
BY GRADER MACHINE (Cont.#1)
Step 5 : Spray the mixing of Renolith and water.
Step 7 : Smoothing the surface by grader and
compacting the road.
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Step 6 : Mix Renolith and Water to Soil-Cement
Properly.
Step 8 : The Renolith road surface 1 day after
construction.
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ROAD CONSTRUCTION PROCEDURE
BY MIXING PLANT
Step 1 : Sub-grade appearance after
completely leveling and compacting.
Step 2 : Mixing Renolith with water at
mixing plant.
Step 3 : Dumpers are waiting for Ready-mixed
Renolith from the continuous mixing plant.
Step 4 : Ready-mixed Renolith flow onto
Dumper.
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ROAD CONSTRUCTION PROCEDURE
BY MIXING PLANT (Cont.#1)
Step 5 : Pour the blend from Dumper to
Paver.
Step 7 : Compacted by vibrating roller
compactor.
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Step 6 : Paving the Renolith-soil-cement
by Paver.
Step 8 : Surface appearance of second
layer after curing.
7 CONCLUSIONS
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1.
POLIMER modified soil-cement (or RC-Soils) are a well proven soil stabilization
process. In essence, it is a mixture of pulverized soil, RENOLIT admixture, cement
and water which when compact, cure and harden will turn into a durable structural
material.
2.
A change in today’s traffic loading conditions as compared to previous; notably
high traffic volume and heavy axle load have rendered modification of the
conventional soil-cement most necessary, if not a must.
3.
The technique is appropriate for new pavement construction, pavement
rehabilitation and recycling works for maintenance.
7 CONCLUSIONS (Cont.#1)
4. By optimizing and improving the engineering properties and performance (e.g. Load
carrying capacity, elastic modulus and thus fatigue resistance and permeability
and thus dimensional stability) of
local materials available on site (e.g. Soil, crushed rocks and gravel) so that they can
be efficient, economical and durable this method lessen the dependence and
reliance on outside imported quarry products and/or borrowed soil materials during
pavement construction. Consequently, it represents not only a time saving solution
but also an environmental sustainable & friendly construction and maintenance
approach.
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7 CONCLUSIONS (Cont.#2)
5. Although partial mechanization, a seemingly more affordable method, is suitable for less
trafficked rural roads or construction in remote areas, full mechanization is preferred in
the construction of major highways and runways or the like structures where better
homogeneity is achieved through more efficient mixing process and also higher and more
predictable output capacity are realizable. In brevity, effective RC-Soils stabilization
treatment requires specialized stabilization or recycling equipment, engineering knowhow, an understanding of materials and quality systems. All these are necessary to
ensure that desired design outcomes are achieved.
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PROJECT REFERENCE
Acapulco Highway, Mexico
Project
Pavement Recycle on Acapulco Highway
Location
Acapulco Highway, Mexico
Project Description
Damaged road demolition and renovation by
Renolith Base Course with Asphalt Concrete pavement.
Total Area
8,000 m2
Type of Existing Soil
Crushed rock
Type of Soil to Fill
No Fill
Type of Soil for Polimer Course
Existing Soil
Typical Section
-Renolith Course Thickness 15 cm
-Asphalt Concrete Thickness 7 cm
Mix Design of Polimer Course
-Portland Cement 6 % by Weight of Dry Soil
-Renolith 10 % by Weight of Cement
-Water 6 % by Weight of Dry Soil
Equipment
-RS500B Reclaimer / Stabiliser
-10 Ton Roller / Water Truck ( 2 )
-Motor Grader
Construction Period
1 month
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Project
Bicycle Track Managed by Bangkok Metropolitan Authority
Location
Ekamai – Ramintra Toll way Road
Project Description
Bicycle Track along the footpath, 2.5 meter width and 24 kilometers length
Total Area
60,000 m2
Type of Existing Soil
Sandy Silt
Type of Soil to Fill
No Fill
Type of Soil for Polimer Course
Existing Soil
Typical Section
- Renolith Course Thickness 7 cm.Asphalt
- Concrete Thickness 3 cm.
Mix Design of Polimer Course
- Cement 5 % by Weight of Dry Soil
- Renolith 5 % by Weight of Cement
- Water 10 % by Weight of Dry Soil
Equipment
Construction Period
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PROJECT REFERENCE
Bicycle Track ,Thailand
-Grader / Roller Compactor
1 Month, November 1997
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PROJECT REFERENCE
Car Parking, Thailand
Project
Auto City Entertainment Center
Location
Rachadaphisek Road, Huay Kwuang, Bangkok
Project Description
Road and Car Parking
Total Area
27,000 m2
Type of Existing Soil
Very Soft Clay
Type of Soil to Fill
Imported Laterite for Sub-grade Course
Type of Soil for Polimer Course
Imported Laterite for Renolith Course
Typical Section
- Sub-grade Course Thickness 10 cm
- Renolith Course Thickness 10 cm
- Concrete Pavement Thickness 7 cm
Mix Design of Polimer Course
- Cement 7 % by Weight of Dry Soil
- Renolith 5 % by Weight of Cement
- Water 10 % by Weight of Dry Soil
Equipment
Back-Hoe / Grader / Roller Compactor
Construction Period
30 Days, December 1998
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PROJECT REFERENCE
Highway No.1003, Thailand
Project
Polimer Soil-Cement Road at Phetchaburi
Managed by Public Works Department
Location
Highway No. 1003 Puploo-Thasalao–Huaykasem
Amphur Nongyaplong, Phetchaburi Province
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Project Description
Road Construction Project Comparing Between Renolith Road and
Conventional Road
Total Area
(W) 8 m. x (L) 18 Km.
Type of Existing Soil
Laterite
Type of Soil to Fill
No Fill
Type of Soil for Polimer Course
Laterite
Typical Section
-Renolith Course Thickness 20 cm
Mix Design of Polimer Course
- Cement 5 % by Weight of Dry Soil
- Renolith 5 % by Weight of Cement
- Water 10% by Weight of Dry Soil
Equipment
Grader / Roller Compactor
Construction Period
55 Days , 26 March 1999
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PROJECT REFERENCE
Rehabilitation Road ,Bangkok
Project
Road Rachadamnoenklang
Managed by Bangkok Metropolitan Authority
Location
Rachadamnoenklang Road, Bangkok
Project Description
Settlement Course Demolition and renovation by Renolith Course with Overlaying
Asphalt Concrete
Total Area
8,000 m2
Type of Existing Soil
Very Soft clay
Type of Soil to Fill
Recycling Asphalt Concrete from Demolition for Sub-grade Course
Type of Soil for Polimer Course
Crushed Rock
Typical Section
- Sub-grade Thickness 15 cm
- Renolith Course Thickness 30 cm
- Asphalt Concrete Thickness 5 cm
Mix Design of Polimer Course
- Cement 5 % by Weight of Crushed Rock
- Renolith 10 % by Weight of Cement
- Water 5 % by Weight of Crushed Rock
Equipment
Back-Hoe, Grader, Roller Compactor and Ready-Mixed Concrete Truck
Construction Period
30 Days, November 1999
Project Cost
3,200,000 Baht
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PROJECT REFERENCE
Farm Entrance Road, Malaysia
Project
FARM ENTRANCE ROAD BY RENOLITH
Location
Koda state, MALAYSIA
Project Description
Farm entrance road
Total Area
L 3,240 m x W 4.30m. x D 150 mm.
Type of Existing Soil
Laterite
Type of Soil to Fill
Laterite ( A-7-5, AASHO Classification)
Type of Soil for Polimer Course
Laterite ( A-7-5, AASHO Classification)
Typical Section
Renolith Course Thickness 15 cm
Mix Design of Polimer Course
- Cement 6.8 % by Weight of Dry Soil
Renolith 5% by Weight of Cement
Water 8% by Weight Laterite (O.M.C.)
Equipment
Grader ,Rotary tiller ,8 tons rubber roller compactor, 12 tons vibratory roller ,Water
truck
Construction Period
14 March 2000
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PROJECT REFERENCE
Road Construction ,GHANA
Project
ROAD Construction BY RENOLITH
Location
GHANA
Project Description
Road Construction by Renolith
Total Area
L 300 m x W 6.00 m x D 120 mm
Type of Existing Soil
Laterite
Type of Soil to Fill
-
Type of Soil for Polimer Course
Laterite
Typical Section
Renolith Course Thickness 12 cm
Mix Design of Polimer Course
- Cement 5% by Weight of Dry Soil
-Renolith 5% by Weight of Cement
-Water 6.48% by Weight Laterite
Equipment
Grader ,Steel Compaction ,Water truck
Construction Period
-