1. Pavement Preservation and Maintenance Private Roads Maintenance Workshop August 18, 2012

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

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

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

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

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

12. Micro-Surfacing

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

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

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