1. KSU Bond Test Update

2. 2 APT Facility at KSU Established in 1997 Owned by KSU Indoor facility Allows full-scale accelerated pavement testing on pavement structures under controlled loading and environment

3. 3 Capabilities Six lanes can be constructed with asphalt or concrete pavement in three pits Freeze thaw possible in one pit Air bag suspension loading on single or tandem axles Standard truck tires and inflation pressure Maximum speed is 7.5 mph

4. 4 APT Facility at KSU

5. 5 Pavement Structure Schematic

6. 6 APT Machine with Temperature Control Chamber (November 2005)

7. APT Machine

8. 8 Third Pit

9. KSU Testing Contacted KSU about doing a bond test in the APT – Daniel Mealiff – Dr. Mustaque Hossain

10. Lab Testing Milled and non-milled cores Compacted lift on top with Gyratory Daniel Mealiff presented results of this last forum

11. APT Bond Test – CISL 17 Existing Pit – CISL 14 – 4.0” 12.5-A HMA – 6.0” AB-3 – 5’ Clay Subgrade Milled 1.5” – Cleaned with Broom and Compressed Air 2.0” HMA Overlay (SR-12.5A)(PG58-28)

12. APT Bond Test – CISL 17 North West EBL 0.07 gal/yd 2 North Middle EBL 0.22 gal/yd 2 North East EBL 0.16 gal/yd 2 South West SS-1HP 0.013 gal/yd 2 South Middle SS-1HP 0.05 gal/yd 2 South East SS-1HP 0.025 gal/yd 2

21. APT Bond Test – CISL 17 Strain gages at interface Compacted to 7% in-situ air voids

22. APT Bond Test – CISL 17.025.05

23. APT Bond Test – CISL 17.16

24. APT Bond Test – CISL 17.07 EBL

25. APT Bond Test – CISL 17

29. Now are looking at 4 different rates of SS-1HP

30. Questions?