Concrete (PowerPoint presentation, 15 MB)

Rigid Pavement

ConcreteConcrete

Rigid Pavement

Transverse CrackingTransverse Cracking

Rigid Pavement

Transverse CrackingTransverse Cracking

Causes:Causes:Slab longer Slab longer than 15’than 15’

Slab CurlSlab CurlCuringCuring

Rigid Pavement

Transverse CrackingTransverse Cracking

Causes:Causes:Slab longer Slab longer than 15’than 15’

Slab CurlSlab CurlCuringCuring

Rigid Pavement

Transverse CrackingTransverse Cracking

Causes:Causes:Slab longer Slab longer than 15’than 15’

Slab CurlSlab CurlCuringCuring

Rigid Pavement

Transverse CrackingTransverse Cracking

Cures:Cures:Crack Crack SealingSealing

Full-depth Full-depth rigid repairrigid repair

Dowel bar Dowel bar retrofitretrofit

Rigid Pavement

Longitudinal CrackingLongitudinal Cracking

Rigid Pavement

Longitudinal Cracking Longitudinal Cracking

Causes:Causes:Waiting Waiting too long too long to cut to cut center center jointjoint

Rigid Pavement

Longitudinal Cracking Longitudinal Cracking

Causes:Causes:Waiting too Waiting too long to cut long to cut center jointcenter joint

Subsoil Subsoil settlementsettlement

Rigid Pavement

Longitudinal CrackingLongitudinal Cracking

Causes:Causes:Waiting too Waiting too long to cut long to cut center jointcenter joint

Subsoil Subsoil settlementsettlement

Rigid Pavement

Longitudinal CrackingLongitudinal Cracking

Causes:Causes:Waiting too Waiting too long to cut long to cut center jointcenter joint

Subsoil Subsoil settlementsettlement

Meander Meander crackscracks

Rigid Pavement

Longitudinal CrackingLongitudinal Cracking

CuresCuresJoint SealingJoint SealingFull Depth Full Depth replacementreplacement

Subsurface Subsurface stabilizationstabilization

Rigid Pavement

PumpingPumping

Rigid Pavement

PumpingPumping

Causes:Causes:WaterWaterFinesFinesLack of load Lack of load transfertransfer

LoadingLoading

Rigid Pavement

PumpingPumping

Causes:Causes:WaterWaterFinesFinesLack of load Lack of load transfertransfer

LoadingLoading

Rigid Pavement

PumpingPumping

Causes:Causes:WaterWaterFinesFinesLack of load Lack of load transfertransfer

LoadingLoading

Rigid Pavement

PumpingPumping

CuresCuresUnder Under sealingsealing

Dowel bar Dowel bar retrofitretrofit

Full depth Full depth rigid repairrigid repair

Concrete Concrete pavement pavement grindinggrinding

Rigid Pavement

FaultingFaulting

Rigid Pavement

FaultingFaulting

Causes:Causes:End-result of End-result of pumpingpumping

Rigid Pavement

FaultingFaulting

Causes:Causes:End-result of End-result of pumpingpumping

Eroded Eroded subsoilsubsoil

Rigid Pavement

FaultingFaulting

Causes:Causes:End-result of End-result of pumpingpumping

Eroded Eroded subsoilsubsoil

Rigid Pavement

FaultingFaulting

Cures:Cures:Full-depth Full-depth rigid repairrigid repair

UndersealingUndersealingDowel bar Dowel bar retrofitretrofit

GrindingGrinding

Rigid Pavement

Transverse Joint SpallingTransverse Joint Spalling

Rigid Pavement

Transverse Joint SpallingTransverse Joint Spalling

Causes:Causes:Improper Improper dowel dowel alignmentalignment

Rigid Pavement

Transverse Joint SpallingTransverse Joint Spalling

Causes:Causes:Improper Improper dowel dowel alignmentalignment

Lack of joint Lack of joint sealseal

Rigid Pavement

Transverse Joint SpallingTransverse Joint Spalling

Causes:Causes:Improper Improper dowel dowel alignmentalignment

Lack of joint Lack of joint sealseal

IncompressibIncompressibles in jointles in joint

Rigid Pavement

Transverse Joint SpallingTransverse Joint Spalling

Cures:Cures:Crack & Joint Crack & Joint SealSeal

Bonded Bonded PatchingPatching

Full-depth Full-depth patchingpatching

Rigid Pavement

Wear & PolishingWear & Polishing

Rigid Pavement

Wear & PolishingWear & Polishing

Causes:Causes:Traffic wears Traffic wears off surface off surface aggregateaggregate

Rigid Pavement

Wear & PolishingWear & Polishing

Cures:Cures:GrindingGrindingAsphalt Asphalt OverlayOverlay

Rigid Pavement

ScalingScaling

Rigid Pavement

ScalingScaling

Causes:Causes:Non-air-Non-air-entrained entrained concreteconcrete

Rigid Pavement

ScalingScaling

Causes:Causes:Non-air-Non-air-entrained entrained concreteconcrete

De-icing De-icing chemicalschemicals

Rigid Pavement

ScalingScaling

Causes:Causes:Non-air-Non-air-entrained entrained concreteconcrete

De-icing De-icing chemicalschemicals

Improper Improper finishing finishing techniquetechnique

Rigid Pavement

ScalingScaling

Cures:Cures:GrindingGrindingAsphalt Asphalt overlayoverlay

Bonded Bonded resurfacingresurfacing

Partial depth Partial depth patchpatch

Rigid Pavement

Shallow ReinforcingShallow Reinforcing

Rigid Pavement

Shallow ReinforcingShallow Reinforcing

Cause:Cause:Reinforcing Reinforcing Steel too Steel too close to close to surfacesurface

Rigid Pavement

Shallow ReinforcingShallow Reinforcing

Cause:Cause:Reinforcing Reinforcing Steel too Steel too close to close to surfacesurface

Rigid Pavement

Shallow ReinforcingShallow Reinforcing

Cure:Cure:Asphalt Asphalt overlay or overlay or patchpatch

Replacing Replacing steel & steel & partial or full partial or full depth repairdepth repair

Rigid Pavement

D-CrackingD-Cracking

Rigid Pavement

D-CrackingD-Cracking

Causes:Causes:Poor quality Poor quality aggregateaggregate

Rigid Pavement

D-CrackingD-Cracking

Causes:Causes:Poor quality Poor quality aggregateaggregate

Freeze/thaw Freeze/thaw cyclecycle

Rigid Pavement

D-CrackingD-Cracking

Cures:Cures:Temporary:Temporary:

Partial Partial depth depth asphalt asphalt patchpatch

Permanent:Permanent:Full-depth Full-depth repairrepair

Rigid Pavement

Corner CrackingCorner Cracking

Rigid Pavement

Corner CrackingCorner Cracking

Causes:Causes:Insufficient Insufficient soil supportsoil support

Rigid Pavement

Corner CrackingCorner Cracking

Causes:Causes:Insufficient Insufficient soil supportsoil support

Temperature Temperature related slab related slab movementmovement

Rigid Pavement

Corner CrackingCorner Cracking

Cures:Cures:Partial or full-Partial or full-depth patchdepth patch

Replace slab Replace slab Stabilize Stabilize subsurfacesubsurface

Rigid Pavement

BlowupsBlowups

Rigid Pavement

BlowupsBlowups

Causes:Causes:Expansion of Expansion of concreteconcrete

Rigid Pavement

BlowupsBlowups

Causes:Causes:Expansion of Expansion of concreteconcrete

Poorly sealed Poorly sealed jointsjoints

Rigid Pavement

BlowupsBlowups

Causes:Causes:Expansion of Expansion of concreteconcrete

Poorly sealed Poorly sealed jointsjoints

Hot weatherHot weather

Rigid Pavement

BlowupsBlowups

Cures:Cures:Pressure Pressure relief joints relief joints to preventto prevent

Patch or Patch or reconstructioreconstruction after n after occurrenceoccurrence