POLYESTER POLYMER CONCRETE Indian Roads Congress Accredited March

POLYESTER POLYMER CONCRETE Indian Roads Congress Accredited (March 2012) Rajesh Oberoi, P. E. (California, USA) DDR Global Infrastructure Pvt. Ltd. WALIA INTERNATIONAL MACHINES CORPORATION 408, Vishwadeep, District Centre, Janak Puri, New Delhi – 110058 Ph # 011 -25546044, 25521275, E-mail : waliaintl@yahoo. com Website : www. waliainternational. com

Introduction DDR Global Infrastructure Pvt. Ltd. RAJESH OBEROI P. E. (Civil) State of California, USA B. Tech. (Civil), 1981, IIT, Kanpur, India M. S. (Civil), 1985, Univ. of Massachussetts, Amherst, MA, USA

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 25 mm – 300 mm Exceptional Bond Strength Used in EXTREME CLIMATIC CONDITIONS with Altitude, Marine/Coastal, Humid, Freeze-Thaw and Desert Environments Polyester Bond line Concrete Break line

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 Bond line Concrete Break line

Polyester Concrete background First 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 m 2 (55 million ft 2) 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)

What is Polyester Concrete? POLYSTER POLYMER CONCRETE (PPC 1121) PORTLAND CEMENT CONCRETE WATER POLYESTER POLYMER RESIN (Unsaturated Isophthalic Poly-Styrene Co-Polymer) CEMENT SAND IS 383 AGGREGATE Natural, 10 mm Down, River Borne AGGREGATE Crushed, 26. 5 mm Down

Approved by FHWA in year 1988

AASHTO Guide Specifications - 1995

Indian Roads Congress Accredited - 2012

Polyester Concrete use in USA

30+ Years of Proven Performance Polyester Polymer Concrete Overlay Placed in 1983 These Pictures were taken in July 2011

Polyester Concrete Properties Thermal coefficient of expansion – 14. 6 x 10 -6 deg C Lower modulus equals less stress Higher tensile and flexural strength High abrasion resistance Excellent bond strength (composite) Very low permeability to water and chlorides Fast setting – traffic in about 2 hours

Key Engineering Properties Chloride Permeability, Coulombs Compressive Strength 24 -hr Early Strength Flexural Strength Modulus of Elasticity (E) Abrasion Open to Traffic Polyester Polymer Concrete (PPC 1121) Portland Cement (8 -Bags) 0 – 200 1, 000 - 3, 000 565 Kg/cm 2 280 Kg/cm 2 155 Kg/cm 2 0. 25 mm/year 490 Kg/cm 2 105 Kg/cm 2 55 Kg/cm 2 21000 - 35000 Mpa 4. 0 mm/year 2 - 4 Hours 3 - 7 Days 7000 - 14000 Mpa

PERMEABILITY

Signature Projects Polyester 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 ADT Vincent Thomas Bridge, Long Beach, CA- 35, 000 ADT South Grand Island Bridge Buffalo, NY- 40, 000 ADT Mc. Cullough Memorial Bridge, Oregon- 20, 000 ADT

Richmond-San Rafael Bridge Extreme Coastal/Marine Environment Built in 1956, 8. 85 KM, Upper & Lower Decks – 3 Lanes on Each Deck Left Lane - Grinded Right Lane - Overlain by PPC Middle Lane - Original, Damaged, Potholed, patched

South Grand Island Bridge, NY Extreme Winter Conditions 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

San Francisco - Oakland Bay Bridge Extreme 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

Polyester Concrete at Airports Polyester 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

Skid Data Marina Viaduct Measured Skid Resistance in 1991 Friction Coefficient = 0. 4 Measured Skid Resistance in 2010 Measured by Towed-Trailer Skid Test Friction Coefficient = 0. 4

Polyester Overlay Construction: Step 1 (If Required): Remove/Grinding existing asphalt or concrete overlay/coating by micro-milling Step 2: Find & Repair spalls or unsound concrete Step 3: Surface Preparation/Shotblasting Step 4: Apply HMWM Resin Prime Coat Step 5: Mix and Pave Step 6: Finish, Tine, sprinkle dry sand, Open to Traffic!

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) 6 mm tooth spacing Hand removal near metal joints Remove slurry seals, chip seals etc. Potholing may be needed to determine existing overlay thickness

Polyester Overlay Construction: Step 2: Find & Repair spalls or unsound concrete Construction Keys: Sawcut edges square Remove only unsound material May be placed during overlay Sandblast or shotblast, blow w/ air

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

Polyester Overlay Construction: Step 4: Apply HMWM Resin Prime Coat Construction 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 350 C Dry deck surface conditions

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

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

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

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

WHAT ABOUT THE COST? OVER A LIFE OF 30 YEARS Polyester Polymer Concrete Overlay (25 mm) Conventional Overlay on Concrete (Typical 65 -100 mm) Rs. 4, 500/Sq. m. Rs. 60, 000/Sq. m. Rs. 1. 25 Cr/Km Lane Length Rs. 21 Cr/Km Lane Length