Ultra-Thin Whitetopping Project Selection Criteria

1. Ultra-Thin Whitetopping Project Selection Criteria Alan Sparkman Executive Director Tennessee Ready Mixed Concrete Association

2. UTW Project Selection Warning!!! This topic is extremely technical and many people may find some of the content offensive due to the level of detail This presentation has been rated X-E for excessive engineering content

3. UTW Project Selection The audience is asked to please refrain from flash photography and audible outbursts during the presentation

4. Selection Criteria #1 Carefully choose any pavement section where asphalt pavement is performing poorly

5. Next Step Send UTW your poor, your tired, your huddled masses of motorists yearning for freedom from potholes, ruts, and constant repairs

6. Thank You for Your Attention! Questions???

7. Selection Criteria � The Letterbox Expanded Edition Intersections Bus lanes Turning lanes Stopping zones Especially ones that are not level

8. Selection Criteria - Continued High-volume traffic areas Difficult and/or inconvenient to repair Heavy traffic (trucks) �Difficult� areas Very light traffic (GA airports) Concentrated wheel loads Short turning radius

9. Other Selection Criteria Existing asphalt pavement condition Thickness of asphalt Foundation Traffic loops (protected) Rebuild or repair?

10. More Selection Criteria Expected future traffic Current repair frequency Safety Ability to stop Skid resistance Lighting

11. One final Criteria Environmental Impact Fuel savings Air Quality � less idling traffic Cool Communities Stormwater runoff/retention Pervious Pavement

12. Thank You for Your Attention! Questions??? (Remember, no flash photography)

13. UTW Construction Sequence (Please refer to previous presentation for any information important enough to remember about the speaker)

14. UTW Construction Sequence Get in Get out Stay out!

15. Construction Considerations Traffic flow determines sequence and method of placement Time available to perform paving and re-open pavement Place by hand or by paving machine Determine mix specifications and proportions

16. Construction Considerations Traffic flow determines sequence and method of placement Shut down or maintain traffic? Restricted working times? Other constraints

17. Construction Considerations Time available to perform paving and re-open pavement Hi-early concrete mix design

18. Construction Considerations Place by hand or by paving machine Size of job especially length of lanes Adequate clearance (4 � 5 feet) Rideability specifications

19. Construction Considerations Determine mix specifications and proportions Early strength requirements Slump (depends on placement method) Haul time from plant to jobsite Time of year Mix characteristics

20. Construction Considerations Mix Characteristics Consistent slump (but not too dry) Fibers (3 lbs/cubic yard) Set time (have to place and finish) Admixtures Dosage rates Dosage order and timing Finishability

21. Construction Considerations Finishability Sticky High air content High cement content Admixtures Bleeding Some combo�s may yield excessive bleed water Surface tearing

22. Before you block traffic � Realistic expectations Clear communication Both sides listen as well as talk Pre-job meeting Post-completion evaluation

23. Construction Sequence Milling Install loops in remaining asphalt Place concrete Try to avoid floating Straightedge Texture or tine

24. Sequence Continues Saw Cure Paint/mark Re-open

25. What about joints? Some do � Kentucky Some don�t � Tennessee

26. Thank You for Your Attention! Questions???