BILL BRANIFF, P.E. - Pavements/Materials Conference

BILL BRANIFF, P.E. - Pavements/Materials Conference

BILL BRANIFF, P.E.
SENIOR DIRECTOR, CONSTRUCTION
ISC DESIGN & DEVELOPMENT
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Track Re-Paving Challenges
• Side-by-side racing
• Uniform vs. Variable banking
• Paving Material Specifications
• Surface Smoothness and Texture
• Existing Infrastructure
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Computer Modeling of Racing Surface
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Side-by-side racing is a product of
Track ‘wearing-in’ (3 years +/-)
Track geometry (immediate)
• Modeling inputs
Track Surface (x, y, z coordinates)
Vehicle Characteristics (Center of gravity, hp, aero map)
• Modeling outputs
Lap Times, Speed, Chassis loading
Race Lines
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Existing Track Characteristics:
•Flat banking in turns
•Single-file racing
Goal: Create side-by side racing by constructing 3 lanes that have similar
lap times
•variable banking
•iterative computer modeling
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After
Before
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Phoenix Modeled Race Lines
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Phoenix Reconfigured Geometry
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Pavement Specification
• PG 82-22 Asphalt Cement
180 degree softening pt.
• Marshall Mix Design
4,000 lbs stability
• 8” / mile PRI
0.1 blanking band
• 96% Gmm target density
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Pedestrian Tunnels – Turns 1 & 2
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Pit Wall Reconstruction
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Crash Wall Reconstruction
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Concrete Pit Stalls
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Concrete Crew Boxes
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Paving Train
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Paving Train
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Specialized Equipment
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Spiral Joint
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Pizza cut
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Quality Control
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Other Tracks…….
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QUESTIONS
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