Download - Design and construction of concrete roads
OLUKAYODE
ALAO
ALXOLU001
2013-10-01 1 CIV5002Z: Structural Concrete Properties and
Practice
CIV5002Z: JOURNAL
PAPER PRESENTATION
DESIGN AND CONSTRUCTION OF
CONCRETE ROADS
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
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
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
2013-10-01 CIV5002Z: Structural Concrete Properties and
Practice 5
TYPES OF RIGID PAVEMENTS
Precast pre-stressed pavements (adopted from www.concreteconstruction.net)
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
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)
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
2013-10-01 CIV5002Z: Structural Concrete Properties and
Practice 9
TYPES OF RIGID PAVEMENTS
RCC (adopted from www.specifyconcrete.org)
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
2013-10-01 CIV5002Z: Structural Concrete Properties and
Practice 11
TYPES OF RIGID PAVEMENTS
Pervious concrete (adopted from www.tececo.com)
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
2013-10-01 CIV5002Z: Structural Concrete Properties and
Practice 13
FAILURE MODES OF RIGID PAVEMENT
Transverse Cracking Alligator Cracking
Longitudinal Cracking
2013-10-01 CIV5002Z: Structural Concrete Properties and
Practice 14
FAILURE MODES OF RIGID PAVEMENT
Rutting
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
Preparation of the base layer
2013-10-01 CIV5002Z: Structural Concrete Properties and
Practice 16
CONSTRUCTION PRACTICES
Proper surface preparation Presence of leaves and mud
Concrete mixing and transport
2013-10-01 CIV5002Z: Structural Concrete Properties and
Practice 17
CONSTRUCTION PRACTICES
Drop concrete at low heights to stifle segregation Continuous batching from Readymix Plant
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
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