2. INTRODUCTION
TYPES OF RIGID PAVEMENTS
FAILURE MODES OF RIGID PAVEMENT
PAVEMENT DESIGN METHOD IN SOUTH AFRICA
CONSTRUCTION PRACTICES
SUMMARY AND CONCLUSION
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PRESENTATION OUTLINE
3. CONCRETE ROADS/RIGID PAVEMENTS - A pavement with road
surface of concrete on a gravel base and subbase, with or
without steel reinforcement and often with transverse joints.
Load Transfer Mechanism
Economics of Rigid Pavement over Flexible Pavements
Longer relative service life
Maintenance free over designed lifespan
Quick construction
High reflective surface
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INTRODUCTION
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TYPES OF RIGID PAVEMENTS
Precast pre-stressed pavements (adopted from www.concreteconstruction.net)
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TYPES OF RIGID PAVEMENTS
CRCP (adopted from www.eupave.eu)JPCP (adopted from onlnemanuals.txdot.gov)
15. cncPave is a computer simulation program whose purpose is
to facilitate competent decision-making when designing
concrete pavements.
Standards of serviceability are determined by the road
engineer.
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PAVEMENT DESIGN METHOD IN SOUTH
AFRICA
16. Preparation of the base layer
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CONSTRUCTION PRACTICES
Proper surface preparationPresence of leaves and mud
17. Concrete mixing and transport
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CONSTRUCTION PRACTICES
Drop concrete at low heights to stifle segregationContinuous batching from Readymix Plant
18. Concrete paving
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CONSTRUCTION PRACTICES
Slip form for accurate level Paver wheels so sit on level surface
Use of supersmoother for finer finish Sawn Joints
19. SUMMARY
Proper design and its accurate execution ensures durable and
structurally sound rigid pavements.
The choice of a pavement material or method requires careful
consideration, accurate analysis and total commitment.
CONCLUSION
Current trends show that concrete pavements are the prime
choice compared to flexible pavements.
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SUMMARY AND CONCLUSION