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Transcript of POLYESTER POLYMER CONCRETE Indian Roads Congress Accredited (March 2012) DDR Global Infrastructure...
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POLYESTER POLYMER CONCRETEIndian Roads Congress Accredited (March 2012)
DDR Global Infrastructure Pvt. Ltd.
Rajesh Oberoi, P.E. (California, USA)
WALIA INTERNATIONAL MACHINES CORPORATION408, Vishwadeep, District Centre, Janak Puri, New Delhi – 110058
Ph # 011-25546044, 25521275, E-mail : [email protected] : www.waliainternational.com
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Introduction
DDR Global Infrastructure Pvt. Ltd.
RAJESH OBEROIP.E. (Civil) State of California,
USAB.Tech. (Civil), 1981, IIT,
Kanpur, IndiaM.S. (Civil), 1985, Univ. of
Massachussetts, Amherst, MA, USA
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Why Polyester Concrete for Overlays in India? Proven technology with a track record
of 30+ years ELIMINATES Maintenance Cost Provides almost 100% protection
against chloride intrusion Provides high skid resistance Quick return to service in less than 2
hrs Can be placed in one lift from 25mm –
300 mm Exceptional Bond Strength Used in EXTREME CLIMATIC
CONDITIONS with Altitude, Marine/Coastal, Humid, Freeze-Thaw and Desert Environments
Polyester
Concrete
Bond line
Break line
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What is Polyester Concrete?A very durable composite
material made of hardened polyester resin, coarse aggregate and sand.
The polyester resin serves as the binding agent - similar to hydrated Portland Cement in PCC.
Engineered Material with Consistent Properties.
Polyester
Concrete
Bond line
Break line
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Polyester Concrete backgroundFirst use of current system 1983 – Thomson
Creek & Beaver Creek Bridges, Yreka, California, USA
1985/86 Highway overlay I-80 (10 lane miles), California, USA
5 million m2 (55 million ft2) surface in place on BRIDGES ALONE in 20 States in the USA equates to approximately 1,500 km of single lane
TODAY – An average of 2 tenders/month are advertised in just one State (California)
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What is Polyester Concrete?POLYSTER POLYMER
CONCRETE (PPC 1121)PORTLAND CEMENT
CONCRETE
WATER
POLYESTER POLYMER RESIN (Unsaturated IsophthalicPoly-Styrene Co-Polymer)
CEMENT
SAND IS383
SANDIS383
AGGREGATENatural,10mm Down, River
Borne
AGGREGATECrushed, 26.5mm Down
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Approved by FHWA in year 1988
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AASHTO Guide Specifications - 1995
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Indian Roads Congress Accredited - 2012
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Polyester Concrete use in USA
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30+ Years of Proven Performance
Polyester Polymer Concrete Overlay Placed in 1983
These Pictures were taken in
July 2011
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Polyester Concrete Properties Thermal coefficient of expansion – 14.6 x 10-6
deg CLower modulus equals less stressHigher tensile and flexural strengthHigh abrasion resistanceExcellent bond strength (composite)Very low permeability to water and chloridesFast setting – traffic in about 2 hours
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Key Engineering Properties
Polyester Polymer
Concrete (PPC 1121)
Portland Cement(8-Bags)
Chloride Permeability,Coulombs 0 – 200 1,000 - 3,000
Compressive Strength 565 Kg/cm2 490 Kg/cm2
24-hr Early Strength 280 Kg/cm2 105 Kg/cm2
Flexural Strength 155 Kg/cm2 55 Kg/cm2
Modulus of Elasticity(E) 7000 - 14000 Mpa 21000 - 35000
Mpa
Abrasion 0.25mm/year 4.0 mm/year
Open to Traffic 2 - 4 Hours 3 - 7 Days
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PERMEABILITY
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Signature ProjectsPolyester Polymer Concrete Overlays
San Francisco-Oakland Bay Bridge, CA- 300,000 ADT
Richmond San Rafael Bridge, CA- 80,000 ADT
Benicia Martinez Bridge, CA – 100,000 ADTVincent Thomas Bridge, Long Beach, CA-
35,000 ADTSouth Grand Island Bridge Buffalo, NY-
40,000 ADTMcCullough Memorial Bridge, Oregon-
20,000 ADT
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Richmond-San Rafael BridgeExtreme Coastal/Marine EnvironmentBuilt in 1956, 8.85 KM, Upper & Lower Decks – 3 Lanes on Each DeckLeft Lane - GrindedRight Lane - Overlain by PPCMiddle Lane - Original,
Damaged, Potholed, patched
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1 KM long critical link, Niagara Falls and Buffalo, NY was overlaid with Polyester Concrete.
Completed: night and full weekend closures
Largest polyester project to date on East Coast
Tough winter weather conditions
Overlay applied to newly replaced precast deck system to protect thin 100 mm concrete deck section
South Grand Island Bridge, NYExtreme Winter Conditions
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San Francisco - Oakland Bay BridgeExtreme Coastal/Marine Environment
Built in 1936 Total Length = 7.18 km Deck Surface overlaid with 25 mm Thick
PPC Total of 110,000 Square Meters One of the busiest bridges in the US 300,000+ vehicles per day 5 lanes on the upper and lower deck
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Polyester Concrete at AirportsPolyester Concrete has been used at airports across the country for spall and concrete repairs:
�San Diego International Airport �Southern CA Logistics Airport �Marine Corps Air Station Pendleton �Sacramento International Airport �Niagara Falls Guard Station Airport �Denver International Airport �Dallas Fort Worth International Airport �Los Angeles International Airport
�PPC 1121 - High Resistance to Jet Fuel/Aviation Hydraulic Fluids
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Skid DataMarina Viaduct
Measured Skid Resistance in 1991 Friction Coefficient = 0.4
Measured Skid Resistance in 2010Measured by Towed-Trailer Skid Test Friction Coefficient = 0.4
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Polyester Overlay Construction:Step 1 (If Required): Remove/Grinding existing asphalt or
concrete overlay/coating by micro-millingStep 2: Find & Repair spalls or unsound concreteStep 3: Surface Preparation/ShotblastingStep 4: Apply HMWM Resin Prime CoatStep 5: Mix and PaveStep 6: Finish, Tine, sprinkle dry sand, Open to Traffic!
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Polyester Overlay Construction:Step 1 (If Required): Remove existing asphalt
or concrete overlay/coating by micromilling Construction Keys:
Use specialized equipment to prevent damage to concrete deck (Caltrans Micromill spec) 6mm tooth spacing Hand removal near metal joints Remove slurry seals, chip seals etc. Potholing may be needed to determine existing overlay thickness
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Polyester Overlay Construction:Step 2: Find & Repair spalls or unsound
concreteConstruction Keys:
Sawcut edges square Remove only unsound material May be placed during overlay Sandblast or shotblast, blow w/ air
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Polyester Overlay Construction:Step 3: Surface
Preparation/Shotblasting Construction Keys
The objective is a surface free of loose material, laitance, previous coatings or oils.
Utilize shotblasting machines Reblast if too much primer
applied in previous shift Remove traffic stripe or buttons
prior to shotblasting Should be blown off with high
pressure air after shotblasting
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Polyester Overlay Construction:Step 4: Apply HMWM Resin
Prime CoatConstruction Keys:
Minimize puddling Place overlay within 15 mins of
placing primer and/or before primer gels
Can be applied with sprayer or rollers
Paving equipment may drive on prime coat
Deck surface temperature between 0 to 350C
Dry deck surface conditions
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Polyester Overlay Construction: Step 5: Mix and Pave
Construction Keys Volumetric mixer ensures best product consistency Paver should have grade control & should consolidate overlay Polyester concrete should be thoroughly mixed and should be
applied within 3-5 minutes of mixing
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Polyester Overlay Construction: Step 6: Finish, Tine, Apply Sand,
Open to Traffic! Construction Keys:
Edges should be tapered, joints/ends may require hand finishing
Expansion joints must be blocked out or sawcut within 4 hours
Sand should be applied uniformly, with additional sand for wet or glossy looking areas
Tining should be applied by paving machine or shortly after
Paving may be opened to traffic after Schmidt hammer reading of 24 or greater
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Polyester Concrete Spall Repair
Step 1: Determine limits, sawcut rectangular
Step 2: Chip and remove unsound concrete, prep and blow clean
Step 3: Apply HMWM prime coat
Step 4: Place and finish polyester concrete, apply sand
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Summary Polymer Concrete Overlay 30+ years of Proven performance. Used in EXTREME CLIMATIC CONDITIONS with Altitude,
Marine/Coastal, Humid, Freeze-Thaw and Desert Environments ELIMINATES almost 100% Maintenance Cost High Strength – Flexural, Tensile, and Compressive Strength 100% Seals bridge deck surfaces against chloride intrusion,
Extremely low permeability to seal the deck Superior adhesion, Exceptional Bond Strength Placement temperature - 00 C to 350 C Performance Temperature: -500 C to +500 C Open to traffic quickly – in 2 hours Provides high skid resistance Thermal coefficient of expansion – compatible to PCC Lower modulus and higher creep equals less stress Excellent abrasion resistance – 16 Times Portland Cement
Concrete Thin composite - minimizing dead load/clearance issues Improves ride quality and drainage MULTIPLE USES APPLICATION – ONE MATERIAL
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WHAT ABOUT THE COST?OVER A LIFE OF 30 YEARS
Polyester Polymer Concrete
Overlay (25 mm)
Conventional Overlay on Concrete
(Typical 65-100mm)
Rs. 4,500/Sq. m. Rs. 60,000/Sq. m.
Rs. 1.25 Cr/Km Lane Length
Rs. 21 Cr/Km Lane Length