1. OLUKAYODE
ALAO
ALXOLU001
2013-10-01 1
CIV5002Z: Structural Concrete Properties and
Practice
CIV5002Z: JOURNAL
PAPER PRESENTATION
DESIGN AND CONSTRUCTION OF
CONCRETE ROADS

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

4.  Precast Pre-stressed pavements
 Conventional concrete pavements
 Joint Plain Concrete Pavements (JPCP)
 Joint Reinforced Concrete Pavements (JRCP)
 Continuously Reinforced Concrete Pavements (CRCP)
 Ultra-thin Reinforced Concrete Pavements (UTRCP)
 Roller concrete compacted pavements (RCC)
 Pervious or porous concrete pavement
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TYPES OF RIGID PAVEMENTS

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TYPES OF RIGID PAVEMENTS
Precast pre-stressed pavements (adopted from www.concreteconstruction.net)

6.  Precast Pre-stressed pavements
 Conventional concrete pavements
 Joint Plain Concrete Pavements (JPCP)
 Joint Reinforced Concrete Pavements (JRCP)
 Continuously Reinforced Concrete Pavements (CRCP)
 Ultra-thin Reinforced Concrete Pavements (UTRCP)
 Roller concrete compacted pavements (RCC)
 Pervious or porous concrete pavement
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TYPES OF RIGID PAVEMENTS

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TYPES OF RIGID PAVEMENTS
CRCP (adopted from www.eupave.eu)JPCP (adopted from onlnemanuals.txdot.gov)

8.  Precast Pre-stressed pavements
 Conventional concrete pavements
 Joint Plain Concrete Pavements (JPCP)
 Joint Reinforced Concrete Pavements (JRCP)
 Continuously Reinforced Concrete Pavements (CRCP)
 Ultra-thin Reinforced Concrete Pavements (UTRCP)
 Roller concrete compacted pavements (RCC)
 Pervious or porous concrete pavement
2013-10-01
CIV5002Z: Structural Concrete Properties and
Practice
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TYPES OF RIGID PAVEMENTS

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TYPES OF RIGID PAVEMENTS
RCC (adopted from www.specifyconcrete.org)

10.  Precast Pre-stressed pavements
 Conventional concrete pavements
 Joint Plain Concrete Pavements (JPCP)
 Joint Reinforced Concrete Pavements (JRCP)
 Continuously Reinforced Concrete Pavements (CRCP)
 Ultra-thin Reinforced Concrete Pavements (UTRCP)
 Roller concrete compacted pavements (RCC)
 Pervious or porous concrete pavement
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Practice
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TYPES OF RIGID PAVEMENTS

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TYPES OF RIGID PAVEMENTS
Pervious concrete (adopted from www.tececo.com)

12.  Cracking – Alligator, Transverse, Longitudinal
 Joint deficiencies
 Surface defects - Rutting
 Miscellaneous distresses – classified as blow-ups, faulting of
transverse joints and cracks, lane-to-shoulder drop-off, lane-
to-shoulder separation, patch deterioration, and water
bleeding and pumping
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FAILURE MODES OF RIGID PAVEMENT

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FAILURE MODES OF RIGID PAVEMENT
Transverse CrackingAlligator Cracking
Longitudinal Cracking

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FAILURE MODES OF RIGID PAVEMENT
Rutting

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

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THANK YOU