Deep patching of fatigued areas and Fatigue cracking structural overlay Thin cold treatment, chip seal, thin asphalt Block cracking (low to moderate) overlay Cracking Edge cracking treatment Longitudinal cracking Crack treatment Reflection cracking at joints Crack treatment Transverse cracking Crack treatment Extensively patched pavements are Patch/patch deterioration candidates for structural repairs, including Patching and deep patching and thick overlays potholes Potholes Same as for patched pavements above Fill rut with microsurfacing or strip chip Rutting densification of pavement seal, then thin cold treatment, chip seal, – thin overlay; or mill and replace. Rutting unstable asphalt concrete Mill and replace. – Shoving Mill unstable material and replace. Surface defects Bleeding Sand seal, chip seal, microsurfacing Thin cold treatment, chip seal, thin asphalt Polished aggregate overlay Fog seal, thin cold treatment, chip seal, Raveling thin asphalt overlay Table 11-. Candidate repair and preventive methods for distresses in concrete pavements (adapted from © ACPA 1997). Distress Type Repair Techniques Preventive Techniques repair and crack sealing Transverse Cracking Dowel bar retrofit Dowel bar retrofit Joint and crack sealing Full-depth repair stitching Longitudinal Cracking Cross stitching Dowel bar retrofit Dowel bar retrofit Slab stabilization Edge joint resealing Corner Cracking Full-depth repair Slab stabilization Cross stitching Intersecting Cracking Full-depth repair Dowel bar retrofit Slab stabilization Joint and crack resealing Spalling Partial-depth repair repair Slab stabilization Joint and crack resealing Full-depth repair Pumping bar retrofit bar retrofit Retrofitted concrete shoulder Retrofitted concrete shoulder Blowups Full-depth repairs Joint and crack resealing Slab stabilization Punchouts Full-depth repairs Retrofitted concrete shoulder
Cracking Fatigue cracking Deep patching of fatigued areas and structural overlay Block cracking (low to moderate) Thin cold treatment, chip seal, thin asphalt overlay Edge cracking treatment Longitudinal cracking Crack treatment Reflection cracking at joints Crack treatment Transverse cracking Crack treatment Patching and potholes Patch/patch deterioration Extensively patched pavements are candidates for structural repairs, including deep patching and thick overlays Potholes Same as for patched pavements above Surface defects Rutting – densification of pavement Fill rut with microsurfacing or strip chip seal, then thin cold treatment, chip seal, thin overlay; or mill and replace. Rutting – unstable asphalt concrete Mill and replace. Shoving Mill unstable material and replace. Bleeding Sand seal, chip seal, microsurfacing Polished aggregate Thin cold treatment, chip seal, thin asphalt overlay Raveling Fog seal, thin cold treatment, chip seal, thin asphalt overlay Table 11-. Candidate repair and preventive methods for distresses in concrete pavements (adapted from © ACPA 1997). Distress Type Repair Techniques Preventive Techniques Transverse Cracking repair Dowel bar retrofit and crack sealing Dowel bar retrofit Longitudinal Cracking Full-depth repair Cross stitching Dowel bar retrofit Joint and crack sealing stitching Dowel bar retrofit Slab stabilization Corner Cracking Full-depth repair Edge joint resealing Slab stabilization Intersecting Cracking Full-depth repair Cross stitching Dowel bar retrofit Slab stabilization Spalling Partial-depth repair Joint and crack resealing repair Pumping Slab stabilization Full-depth repair bar retrofit Retrofitted concrete shoulder Joint and crack resealing bar retrofit Retrofitted concrete shoulder Blowups Full-depth repairs Joint and crack resealing Punchouts Full-depth repairs Slab stabilization Retrofitted concrete shoulder
11%20Pavement%20Rehabilitation%20Strategies.docx