08b Waste Plastic Bags In Asphalt Concrete

WASTE PLASTIC BAGS in ASPHALT CONCRETE Josefina R. Celorico MSD-ITDI-DOST

Technical Briefing on Plastics and Environment Century Park Hotel, Manila

July 25, 2008

OUTLINE OVERVIEW  PROPERTIES  APPLICATION  SUMMARY 

Waste Utilization 

ITDI R&Ds initiatives     

Bioreactor Biogas Recycling of laminates Styro-plastic melting densifier Waste plastic bags in asphalt concrete

Asphalt concrete    

Common materials for road construction Consists of aggregates and asphalt Aggregates : fine and coarse Asphalt  



bituminous material obtained from petroleum processing binds aggregate in asphalt concrete

Use of waste and industrial products 

rubber tires

Waste plastic bags in asphalt concrete



Consists of aggregates and asphalt with waste plastic bags  

Constructing new road pavements Resurfacing of road pavements (repair of potholes)

Properties

Tests 

Marshall Mix Design 



Immersion Compression Strength 



Determines the optimum mix of asphalt and aggregates suitable for road pavement Determines retained strength after immersion in water for 4 days at 50ºC

Skid resistance 

Determines durability of asphalt concrete

Marshall stability Marshall Method Mix Criteria

Heavy Traffic Surface and Base Min Max

Compaction, no. of blows each end of specimens Stability, lb

75

1800

Asphalt concrete with waste plastic bags 75

-

3875

Immersion Compression Strength Control (Asphalt concrete) Dry Bulk gravity

specific 2.425

Stability,Kpa Index of retained strength,% (minimum = 70)

2742

Asphalt concrete with waste plastic bags

Wet

Dry

2.410

2.403

2.402

1981

2754

2081

70.44

Wet

75.45

Skid Resistance 

Minimum skid resistance value (SRV) 

 

55 SRV (Motorways, Trunk, and class 1 and heavily trafficked road carrying more than 2000 vehicles/day

Control (asphalt concrete) = 90 SRV Asphalt concrete with waste plastic bags = 102 SRV

APPLICATION

Repair of Potholes 

MSD bldg   



6 potholes August 2007 8.0 kg waste plastic bags

STD bldg   

6 potholes June 2008 6.0 kg waste plastic bags

Equipment   

 

Plastic Shredder Asphalt and waste plastic bags mixer Aggregate and asphalt with waste plastic bags mixer Concrete cutter Compactor

Shredding of waste plastic bags

Asphalt

Shredded waste plastic bags

Blending/Mixing

Asphalt with waste plastic bags

Asphalt with waste plastic bags

Aggregates

Mixing

Asphalt concrete with waste plastic bags

SUMMARY 



Potential of utilizing waste plastic bags in road pavement Asphalt concrete with waste plastic bags is economically, technically and environmentally viable