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The World’s First Thermoplastic Bridges made of Recycled Plastics John S. Kim, PhD, PE, Senior Professional Associate, Parsons Brinckerhoff October 10,

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Presentation on theme: "The World’s First Thermoplastic Bridges made of Recycled Plastics John S. Kim, PhD, PE, Senior Professional Associate, Parsons Brinckerhoff October 10,"— Presentation transcript:

1 The World’s First Thermoplastic Bridges made of Recycled Plastics John S. Kim, PhD, PE, Senior Professional Associate, Parsons Brinckerhoff October 10, 2013

2 U.S. Highway Bridges 600,000 highway bridges in U.S.  One third of them built immediately after World War II  The use of deicing material  Increased traffic volume and weight  Structurally deficient or functionally obsolete

3 Bridges in Trouble $229 billion bridge issue  When people in ties and suites frequently appear under the bridges, it means a serious business!  60 percent of 600,000 US highway bridges are short- span bridges.

4 Why Recycled Plastic? Plastic waste: global issue  100 million tons each year worldwide  Hard to degrade  Recycled plastics are hardly reused. Enhanced properties from constant R&D Collective efforts for green solutions  Governments’ incentives on the use of green products

5 From Wasteful to Useful

6  Recycled Plastic  Immiscible Polymer Blend  High Density Polyethylene with Polystyrene or Polypropylene coated glass fibers Thermoplastic Composite

7 Product Advantages  Green Product (Recycled Plastic)  No Corrosion, Rotting or Insect Infestation  Reduced Landfill Dumping  Good Toughness Characteristics  No Chemical Additives  Green House Gas Savings  Reduced Maintenance  Sustainable & Durable  Cost Competitive: Initial and Life Cycle

8 Thermoplastic Properties  Weight: 55pcf (Wood: 60pcf; Concrete: 150pcf; Steel: 490pcf)  Specific Gravity: 0.85 – 0.90  Elastic Modulus: 350,000 psi  Allowable Flexural Stress: 600 psi (Ult. = 3,000 psi)  Allowable Compressive Stress: 600 psi (Ult. = 2,500 to 4,300 psi)  Allowable Shear Stress: 350 psi (Ult. = 1,500 psi)  Coefficient of Thermal Expansion: in/in/deg F

9 Typical Stress/Strain Curve

10 Design Considerations  Ultraviolet Degradation: Less than inches/year (in full sun exposure)  Moisture Absorption: Virtually impervious, retains properties in humid and wet environments  Thermal Resistance: Heat deflection temperature is 125 deg C and material viable to -125 deg C  Environmental Resistance: Resistant to attack by marine borers, insects, rot and corrosion  Acid Resistance: Resistant to most acids and salts

11 Design Considerations (Cont’d)  Creep: High Factor of Safety with respect to Ultimate Stress lowers creep considerably  Abrasion: Highly Resistant to salts and sand occurring in Marine environments  Skid Resistance: Coefficient of Friction = 0.5 with Tire (can be improved with surface texturing)  Abutment Backfill: Prefer light weight material  Color: Basic color is Graphite but can be produced in Gray, Beige, etc.

12 Fire Retardant Testing

13 Bridge Applications

14 Fort Leonard Wood, MO W = 26 ft; L = 24 ft Max Load = 25,000 lbs. 1998

15 Wharton State Forest, NJ * Length - 56 feet * Live Load - HS

16 Fort Bragg, NC Load Bearing CapabilityM1 Abrams Tank on the Bridge 2009

17 Fort Bragg Construction Driving RSPC piles Pile Cap Installation

18 World’s First Railroad Bridges Fort Eustis, Virginia Bridge No. 3 Bridge No

19 World’s First Railroad Bridges Fort Eustis, Virginia Bridges No. 3 and No. 7  Live Load: Cooper E60 and 260 Kip alternate loading with 20% impact  Deflection: L/600  Length of Piles: about 45 feet  Capacity of piles: 17 – 20 tons in end bearing per Pile  Abutments: Existing timber abutments retained  RSPC Elements: Railroad ties, curbs, girders, shear blocks, pier caps, piles and transverse connectors

20 Fort Eustis, VA Typical Section

21 Driving RSPC Piles Splicing Pile Cap Installation Fort Eustis Construction

22 Transportation Installation Storage Fort Eustis Construction

23 Fort Eustis, VA Competed Bridge No. 3

24 Fort Eustis, VA Completed Bridge No. 7

25 Live Load Testing

26 Bridge No. 3 Bridge No. 7 Fort Eustis, VA Deflections

27 Scotland Highway Bridges 2011

28 Scotland Highway Bridges

29

30

31 Maine Highway Bridge 2011

32 Maine Highway Bridge Before - 3 ft Culvert After - 13 ft Bridge

33 Maine Highway Bridge Abutment Backfilling Piles and Pier Cap

34 Ohio Highway Bridge Exiting Bridge-Deteriorated Superstructure

35 Ohio Highway Bridge New Bridge-Plan View

36 Ohio Highway Bridge New Bridge - Elevation

37 Ohio Highway Bridge Typical Section

38 Ohio Highway Bridge Pile Driving

39 Ohio Highway Bridge Beam Installation

40 Ohio Highway Bridge Deck Installation

41 Ohio Highway Bridge Opened in December 2012

42 Other Applications

43 Railroad Ties and Switch Set

44 Retaining Walls

45 Sound Walls

46 More Applications  Marinas  Fenders  Jetties and Piers  Platforms and Boardwalks  Temporary Reusable Bridges  Culverts

47 Acknowledgement  Producer:Axion International, Inc.  Designer:Parsons Brinckerhoff  Inventor: Rutgers University

48 Conclusions  Green, Sustainable and Durable  Environmentally Beneficial  Vast Areas of Application  Accelerated Construction  Minimal Maintenance  Cost Competitive

49 Questions?


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