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KSU Bond Test Update Slide 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 Slide 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 Slide 4 4 APT Facility at KSU Slide 5 5 Pavement Structure Schematic Slide 6 6 APT Machine with Temperature Control Chamber (November 2005) Slide 7 APT Machine Slide 8 8 Third Pit Slide 9 KSU Testing Contacted KSU about doing a bond test in the APT Daniel Mealiff Dr. Mustaque Hossain Slide 10 Lab Testing Milled and non-milled cores Compacted lift on top with Gyratory Daniel Mealiff presented results of this last forum Slide 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) Slide 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 Slide 13 Slide 14 Slide 15 Slide 16 Slide 17 Slide 18 Slide 19 Slide 20 Slide 21 APT Bond Test CISL 17 Strain gages at interface Compacted to 7% in-situ air voids Slide 22 APT Bond Test CISL 17.025.05 Slide 23 APT Bond Test CISL 17.16 Slide 24 APT Bond Test CISL 17.07 EBL Slide 25 APT Bond Test CISL 17 Slide 26 Slide 27 Slide 28 Slide 29 Now are looking at 4 different rates of SS-1HP Slide 30 Questions?