Asphalt Research in Pennsylvania. Larson Transportation Institute

Transcription

1 Asphalt Research in Pennsylvania

2 Facilities to Support Pavement/Materials Research Penn State, University Park Penn State, Altoona Temple University

3 Facilities to Support Pavement/Materials Research Penn State Test Track Civil Infrastructure Testing & Evaluation Laboratory (CITEL) Northeast Center of Excellence for Pavement Technology (NECEPT) Center for Dirt and Gravel Roads (CDGR) Materials Research Institute (MRI)

4 Facilities/Equipment Full Scale/Model Scale Testing/Evaluation Penn State Test Track Facilities (Full Scale) Model Mobile Load Simulator (Third Scale) Laboratory Scale Testing Several closed-loop servo-hydraulic Systems Instron Screw-Driven Machine & Biaxial Shear Tester Several Environmental Conditioning Chambers Compactors, Ovens, Viscometers Raveling Test Machine Anton Paar MCR302 Modular Compact Rheometer Canon Bending Beam Rheometer, Direct Tension Tester Asphalt Foaming Device Aging Ovens and Vessels

5 Penn State Test Track

6 Model Mobile Load Simulator (3 rd Scale) Accelerated Loading Up to 100 psi pressure Up to 600 lbs load 7200 passes per hour

7 Lab Equipment Rutting/Moisture Damage Testers

8 Lab Equipment Mechanical Testers Modulus/Fatigue Raveling/Durability (Cold Mix/Chip Seal) Foamer

9 Materials Characterization Lab (MCL) Microscopy (SEM, TEM, AFM) Mineralogy (QXRD) Chemical analysis of solids, liquids, gasses (XRF, ICP, IC, GC) Thermal analysis (TGA, DSC) Spectroscopy (FTIR, Raman, UV-Vis, XPS) Nanofabrication and testing Particle analysis (size, shape, surface area, pore size) Electrical and magnetic techniques

10 Enhanced Moisture Damage Study HWTD Dynamic Modulus Hamburg Wheel Tracking MiST

11 Wheel Tracking Results All mixes, 9.5mm SP, at 35% RAP Mixes at Various Rejuvenator Contents None 2% 5% 8%

12 Hamburg Wheel Tracking at 46C Number of Wheel Passes 0 5,000 10,000 15,000 20,000 25,000 30,000 SIP (# of passes) NONE Ratio of the slope (strip/creep) 0.99 Max Rut (mm) Rut Depth, mm Binder Effect -3.0 HWT TEST DATA Source: Limestone, PG Larson -3.5 Transportation Institute

13 Hamburg Wheel Tracking at 46C 0-2 Number of Wheel Passes 0 5,000 10,000 15,000 20,000 25,000 30,000 SIP (# of passes) 19,907 Ratio of the slope (strip/creep) 5.57 Max Rut (mm) Rut Depth, mm Binder Effect HWT TEST DATA Source: Limestone, PG 58-28

14 HWTD RAP/Rejuvenator Effect, 50C Number of Wheel Passes ,000 10,000 15,000 20,000 25,000 SIP (# of passes) NONE Ratio of the slope (strip/creep) 1.19 Max Rut (mm) Rut Depth, mm HWT TEST DATA Source: SP 9.5 mm, Limestone, 35% RAP - No Rejuventor

15 RAP/Rejuvenator Effect, 50C Number of Wheel Passes ,000 10,000 15,000 20,000 25,000 SIP (# of passes) 16,800 Ratio of the slope (strip/creep) 2.44 Max Rut (mm) Rut Depth, mm HWTD Test Data Source: SP 9.5mm, Limestone, PG 64-22, 35% RAP, 2% Rejuventor Larson -5.0 Transportation Institute

16 RAP/Rejuvenator Effect, 50C Number of Wheel Passes 0 5,000 10,000 15,000 20,000 25,000 SIP (# of passes) 9,083 Ratio of the slope (strip/creep) 2.79 Max Rut (mm) Rut Depth, mm HWT TEST DATA Source: SP 9.5 mm, Limestone, 35% RAP - 5% Rejuventor

17 RAP/Rejuvenator Effect, 50C Number of Wheel Passes 0 2,000 4,000 6,000 8,000 10,000 12,000 14,000 SIP (# of passes) 5,194 Ratio of the slope (strip/creep) 4.21 Max Rut (mm) Rut Depth, mm HWTD Test Data Source: SP 9.5mm, Limestone, PG 64-22, 35% RAP, 8% Rejuventor Larson Transportation Institute

18 RAP/Rejuvenator Effect, 50C Number of Wheel Passes 0 5,000 10,000 15,000 20,000 25,000 0% 2% Rut Depth, mm % Larson Transportation Institute 8%

19 RAP Characterization Through Impact Resonance Test

20 Use of Fibers in Pavement Materials Recent & Current Research Delaying reflection cracks using fiber mixes (MMLS3) Extending durability of microsurfacing (Cantabro, Wet Track Abrasion) Rheological behavior of fiber modified asphalt binders

21 Performance Enhancement Using New Polymers High Shear Polymer Blending Rheological Testing

22 Bio-Asphalt Research FT-IR spectrum of samples of bio-asphalt at different aging conditions Bruker FT IR spectrometer with Attenuated Total Reflectance (ATR) accessory

23 Recycled Asphalt Shingles (RAS) Over 10 million tons of RAS Almost 90% Post-Consumer (RAS-TO) The rest is Waste from Production (RAS-MW)

24 374F (190C) Binder Recovered from RAS Too Stiff to Pour

25 Mix Design Guide for RAP Cold Mixes A Simplified Approach

26 Use of Double Layer Chip Seals over Paving Fabrics

27 Use of Double Layer Chip Seals over Paving Fabrics Evaluation Oct 18, 2018 Placement August 6, 2018

28 Use of Quarter Size Aggregates for Single Layer Chip Seals Flakiness Index Gradation Average Least Dimension Raveling Flakiness Index Plate

29 Use of Quarter Size Aggregates for Single Layer Chip Seals