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SmartPave

SmartPave. SmartPave: Technical Details Asphalt Rheometer according to AASHTO TP5, T315-04. Features Perfect temperature control Lowest thermal gradients due to the actively heated hood Designed for testing according to AASHTO T315 No water or gas flow Special asphalt software

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SmartPave

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  1. SmartPave

  2. SmartPave: Technical DetailsAsphalt Rheometer according to AASHTO TP5, T315-04 Features • Perfecttemperaturecontrol • Lowest thermal gradientsdue totheactivelyheatedhood • DesignedfortestingaccordingtoAASHTO T315 • Nowateror gas flow • Special asphaltsoftware • Automatic temperature calibration • -30°C (-40°C) -> 120°C (200°C) • Amplitude sweeplinearitytest • Based on MCR • Highlydynamic EC-Motor • Air bearingofextremelyhighstiffnessTorquerange: 0.1µNm to 150 mNmAngle resolution: 0.01 µrad

  3. What is Bitumen? What is Asphalt? • Bitumen = Binder • Asphalt = Binder + Additives (ash, ...) • Contents of binder • hydrocarbons • resins • paraffins, waxes and fats • heavy oils • proteins, lignins and complex oxygen, nitogen and sulfur compounds • Formed by microorganisms as part of crude oil and coal. • Residue from evaporation/distillation at 400 °C. • Example: Bitumen 1 Bitumen 2 • 80 % hydrocarbons 60 % hydrocarbons • 10 % resins 20 % resins • 1 % asphaltenes 15 % asphaltenes • 9 % others 5% others

  4. PTD – Asphalt Peltier Temperature Device MCR Series Peltier Temperature Device Truly Peltier Heated Hood Patented Technology • Excellent Heating and Cooling characteristics • Temperature range -30°C to 120°C • Truly Peltier heated hood • Sliding Rail for peltier hood • Quick Connect • Toolmaster for basis plate & hood • Control Boards are part of the MCR • Combination of Radiation & Conductive Heating and Cooling • Certified temperature calibration sensor • Constant counter cooling temperature over a wide working range • Measuring plates and insets 25mm, 8mm -30°C to 120°C Sliding Rail: Flexible Positioning Peltier Convection & Radiation MCR Integrated Control Boards Peltier Heated Basis Plate

  5. PTD – Peltier Temperature DeviceSliding Rail for the Modular Peltier Hood Any description needed ? • Quick Connect • Toolmaster • Sliding Rail for flexible positioning of the peltier hood

  6. Sample Handling… Test Specimen Preparation • Direct pour • No mould. • Limits stearic hardening. • Referee method. • Mould pouring • Can pour multiple specimens at once. • Convenient. • Can mount specimen on upper or lower plate. • Limit time in mould, 2 hrs max., stearic hardening a concern.

  7. Specimen Trimming Cleanly trimming the specimen, this is very important. Excessive material (smears) leftover after trimming and/or removing too much material can lead to errors. • Recommendations: • Keep specimen to a manageable size. • Trim in small sections. • Heat the trimming tool to appropriate temperature, avoid too hot (smoking) and too cool (pulling) conditions. • Trimming tool design important.

  8. Specimen Trimming

  9. PTD – Peltier Temperature DeviceVerification / Calibration of the sample temperature For those customers who have to verify the temperature in the measuring gap: • Automatic temperature calibration routine (Rheoplus Software) • Certified sensor • Calibration sensor in the measuring gap • Connection of the calibration sensor to the rheometer • Plug & play

  10. SmartPave: Technical DetailsAccessories Accessories for SmartPave: Software Rheoplus Insets 25 and 8 mm Measuring plates 25 and 8 mm Calibration sensor CSA Peltier chamber P-PTD200/56/I Peltier hood H-PTD120

  11. AASHTO T315Application • Performance based Asphalt Binder Specifications • High and low temperatures • Loading conditions • Vehicle speed of 100 km/h • Traffic volume

  12. AASHTO T315Application • Environmental conditions may lead to the following phenomena • Ruttings: Aqua planing • Fatigue cracking • Thermal cracking

  13. RTFO & PAVApplication • Aging in the Rolling Thin Film Oven (RTFO): • Simulates the thin films of binder as they are exposed to heat and forced air during the mixing process and placement • Evaporation and oxidation (small molecules disappear) Aging in the Pressure Aging Vessel (PAV): • Simulates in-service aging after 5 to 10 years in the field • Asphalt Binders are exposed to high temperature (100°C) and air pressure (2.07 MPa) for 20 hours to simulate long-term aging. Resulting viscosity of the PAV-aged asphalt binder is approximately 8+ times the viscosity of the unaged asphalt binder. Source: SHRP 1994

  14. Rheoplus Supported TestsAASHTO T315 • The standard defines 4 tests: • Original Binder Deformation/Ruttings • Rolling Thin Film Oven - RTFO Aged Binder Deformation/Ruttings • Pressure Aging Vessel Residue - PAV Aged Binder Fatigue Cracking • Linearity • Grading: • Used to define the performance grade of an unknown sample • Test at start temperature (58°C, 19°C for PAV) • Test failed: • Temperature step until sample passes 6°C (3°C for PAV) • Test passed: • Temperature step until samples fails • Verification: • Carried out at one pre-defined temperature • To verify the grading of a sample (passed or failed)

  15. Rheoplus Predefined Asphalt Workbooks Predefined workbooks according to AASHTO T315 can be found in the Rheoplus The Smart Applications guide the user through the setup of the instrument.

  16. Rheoplus Grading TestsAASHTO T315 – Grading • Settings for grading tests • Parallel-Plate: PP25/1mm gap or PP08/2mm gap for PAV • Angular Frequency: 10 rad/s • Binder [ G*/sin(delta) > 1.0 kPa ] • Strain for Binder: 12% • Start temperature: 58°C • More temperatures: (46, 52, 58, 64, 70, 76, 82)°C • RTFO [ G*/sin(delta) > 2.2 kPa ] • Strain for RTFO: 10% • Start temperature 58°C • More temperatures (46, 52, 58, 64, 70, 76, 82)°C • PAV [ G*/sin(delta) < 5000 kPa ] • Strain for PAV: 1% • Start temperature 19°C • More temperatures (4, 7, 10, 13, 16, 19, 22, 25, 28, 31, 37, 40)°C

  17. Rheoplus Grading TestsAASHTO T315 – Grading • Settings for verification tests • Parallel-Plate PP25 (PP08 for PAV) • Angular Frequency for all samples: 10 rad/s • Binder [ G*/sin(delta) > 1.0 kPa ] • Strain for Binder: 12% • Performed at grading temperature • RTFO [ G*/sin(delta) > 2.2 kPa ] • Strain for RTFO: 10% • Performed at grading temperature • PAV [ G*/sin(delta) < 5000 kPa ] • Strain for PAV: 1% • Performed at grading temperature

  18. Rheoplus Predefined Asphalt Workbooks RheoPlus Software with special simple to run Asphalt Workbooks

  19. Rheoplus Asphalt WorkbookRheoPlus software with special asphalt workbooks that guide the user step-by-step

  20. SHRP: AASHTO T315Tests Results

  21. AASHTO T315Original Binder Test Results Original Binder; Passed at 64, 70; Failed at 76and 82 Criteria: |G*| /sind > 1.0 kPa

  22. AASHTO T315RTFO Aged Binder Test Results Test Results RTFOT; Passed at 46, 58, 70 Criteria: |G*| /sind > 2.2 kPa

  23. AASHTO T315PAV Aged Binder Test Results Test Results PAV (aged 12 hours); Passed at 28, 22, 16; Failed at 10and 4 Criteria: |G*| · sind < 5000 kPa

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