08b waste plastic bags in asphalt concrete
DESCRIPTION
From the Technical Briefing on Plastics and the Environment, July 25, 2008, Century Park Hotel, Malate, Manila, PhilippinesMore at http://ecosolutionsmanila.blogspot.com/TRANSCRIPT
WASTE PLASTIC BAGS in
ASPHALT CONCRETE
Josefina R. CeloricoMSD-ITDI-DOST
Technical Briefing on Plastics and EnvironmentCentury 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
Determines the optimum mix of asphalt and aggregates suitable for road pavement
Immersion Compression Strength Determines retained strength after immersion in
water for 4 days at 50ºC Skid resistance
Determines durability of asphalt concrete
Marshall Method Mix Criteria
Heavy TrafficSurface and BaseMin Max
Asphalt concrete with waste plastic
bagsCompaction, no. of blows each end of specimens
75
75
Stability, lb 1800 - 3875
Marshall stability
Control(Asphalt concrete)
Dry Wet
Asphalt concrete with waste plastic bags
Dry WetBulk specific gravity
2.425 2.410 2.403 2.402
Stability,Kpa 2742 1981 2754 2081
Index of retained strength,%(minimum = 70) 70.44
75.45
Immersion Compression Strength
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
Asphalt with waste plastic bags
Blending/Mixing
Shredded waste plastic bags
Mixing
Asphalt with waste plastic bags Aggregates
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