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Pavement Preservation and Maintenance

Pavement Preservation and Maintenance. Private Roads Maintenance Workshop August 18, 2012. ASPHALT. SMOOTH | DURABLE | SAFE | QUIET. Pavement Maintenance Types. Preventive (Proactive) Preserves good condition pavement Arrest light deterioration

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Pavement Preservation and Maintenance

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  1. Pavement Preservation and Maintenance Private Roads Maintenance Workshop August 18, 2012 ASPHALT SMOOTH | DURABLE | SAFE | QUIET

  2. Pavement Maintenance Types Preventive (Proactive) Preserves good condition pavement Arrest light deterioration Retard progressive failures Reduce need for corrective maintenance Corrective (Reactive) After deficiency occurs; more expensive Load carrying ability Waterproofing (cracks) Surface slope (rutting) Surface roughness

  3. Pavement Preservation Techniques Crack Seal (for Flexible / Asphalt Pavements) Fog Seal Slurry Seal Thin HMA Overlay Ultrathin Bonded Wearing Course Micro-Surfacing

  4. Crack Sealing Routine maintenance Cleaning & sealing Prevents intrusion of water & incompressible materials

  5. Crack Sealing Extent of Problem Effective High severity Low severity Distress Type Marginal Fatigue Cracking Linear or Block Crack. Rutting Raveling Bleeding Roughness Texture Loss Moisture Damage No Impact Not Appropriate For identification of severity of distress: SHRP P338 Distress Manual

  6. Surface Treatments Typically used to: Seal cracks Waterproof surface Improve surface texture Rejuvenate surface

  7. Fog Seal Seal pavement Inhibit raveling Enrich hardened/ oxidized asphalt Provide delineation with shoulder

  8. Fog Seal Extent of Problem Effective High severity Low severity Distress Type Marginal Fatigue Cracking Linear or Block Crack. Rutting Raveling Bleeding Roughness Texture Loss Moisture Damage No Impact Not Appropriate

  9. Slurry Seal Type I (small aggregate) Seal surface cracks Type II (medium aggregate) Correct raveling/ oxidation Type III (larger aggregate) Fill minor surface irregularities and restore surface texture

  10. Slurry Seal Extent of Problem Effective High severity Low severity Distress Type Marginal Fatigue Cracking Linear or Block Crack. Rutting Raveling Bleeding Roughness Texture Loss Moisture Damage No Impact Not Appropriate

  11. Micro-Surfacing Inhibit raveling & surface oxidation Improve surface texture Fill ruts/minor surface irregularities Seal pavement surface

  12. Micro-Surfacing

  13. Micro-Surfacing Extent of Problem Effective High severity Low severity Distress Type Marginal Fatigue Cracking Linear or Block Crack. Rutting Raveling Bleeding Roughness Texture Loss Moisture Damage No Impact Not Appropriate

  14. Ultrathin Bonded Wearing Course Porous Firmly bond to existing surface Seal pavement Increase surface macro-texture Address surface distress Reduce back-spray improving visibility

  15. Thin Overlay Improve smoothness and surface texture Address surface distress Improve profile, crown, and cross-slope

  16. Thin Overlay Extent of Problem Effective High severity Low severity Distress Type Marginal Fatigue Cracking Linear or Block Crack. Rutting Raveling Bleeding Roughness Texture Loss Moisture Damage No Impact Not Appropriate

  17. Benefits of Pavement Preservation The “right” treatment At the “right” time On the “right” project Extended life or serviceability Lower life-cycle costs (cost effectiveness)

  18. Questions? Larry Patrick Executive Director Ok. Asphalt Pavement Assoc. 405-524-7675 lpatrick@okhotmix.com

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