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Design and construction of concrete roads
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Design and construction of concrete roads

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  • 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 2013-10-01 CIV5002Z: Structural Concrete Properties and Practice 2 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 2013-10-01 CIV5002Z: Structural Concrete Properties and Practice 3 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 2013-10-01 CIV5002Z: Structural Concrete Properties and Practice 4 TYPES OF RIGID PAVEMENTS
  • 5. 2013-10-01 CIV5002Z: Structural Concrete Properties and Practice 5 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 2013-10-01 CIV5002Z: Structural Concrete Properties and Practice 6 TYPES OF RIGID PAVEMENTS
  • 7. 2013-10-01 CIV5002Z: Structural Concrete Properties and Practice 7 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 8 TYPES OF RIGID PAVEMENTS
  • 9. 2013-10-01 CIV5002Z: Structural Concrete Properties and Practice 9 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 2013-10-01 CIV5002Z: Structural Concrete Properties and Practice 10 TYPES OF RIGID PAVEMENTS
  • 11. 2013-10-01 CIV5002Z: Structural Concrete Properties and Practice 11 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 2013-10-01 CIV5002Z: Structural Concrete Properties and Practice 12 FAILURE MODES OF RIGID PAVEMENT
  • 13. 2013-10-01 CIV5002Z: Structural Concrete Properties and Practice 13 FAILURE MODES OF RIGID PAVEMENT Transverse CrackingAlligator Cracking Longitudinal Cracking
  • 14. 2013-10-01 CIV5002Z: Structural Concrete Properties and Practice 14 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. 2013-10-01 CIV5002Z: Structural Concrete Properties and Practice 15 PAVEMENT DESIGN METHOD IN SOUTH AFRICA
  • 16.  Preparation of the base layer 2013-10-01 CIV5002Z: Structural Concrete Properties and Practice 16 CONSTRUCTION PRACTICES Proper surface preparationPresence of leaves and mud
  • 17.  Concrete mixing and transport 2013-10-01 CIV5002Z: Structural Concrete Properties and Practice 17 CONSTRUCTION PRACTICES Drop concrete at low heights to stifle segregationContinuous batching from Readymix Plant
  • 18.  Concrete paving 2013-10-01 CIV5002Z: Structural Concrete Properties and Practice 18 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. 2013-10-01 CIV5002Z: Structural Concrete Properties and Practice 19 SUMMARY AND CONCLUSION
  • 20. 2013-10-01 CIV5002Z: Structural Concrete Properties and Practice 20 THANK YOU